[Qgis-user] Error of "Cannot Use Project Transform..."

[Michael Treglia]

Hi All,

Using QGIS 3.10.2 on Windows x64, installed via OSGeo4w.

When opening a .qgz file with data in ESRI code 102008 and the project in
EPSG 4326, I get a warning - "Cannot use project transform between
ESRI:102008 and Unknown CRS"

Upon clicking the Details button, a window pops up - "Project
Transformation Not Available", with the full text pasted at the end of the
email. There is also a link to download and button to install the "Grid
Shift File"

I wanted to check if there was a big change from 3.4 to 3.10 that
deprecates certain types of transformations or something, that now requires
these grid shift files to specifically be installed. I know there have been
some major broader changes with gdal and such, but this issue does not
happen with version 3.4.15.  As much as anything, I'm just thinking about
what might come up in future workflows, as 3.10 becomes the LTR.

Thanks so much for any insights, and for your time. Best regards,
Mike


Full message from Project Transformations Not Available Box:

This project specifies a preset transform between ESRI:102008 -
North_America_Albers_Equal_Area_Conic and Unknown CRS:
GEOGCRS["unknown",DATUM["unknown",ELLIPSOID["WGS 8…, which is not available
for use on the system.

   - This transformation requires the grid file “NA83SCRS.GSB”, which is
   not available for use on the system.

The operation specified for use in the project is:

+proj=pipeline +step +inv +proj=aea +lat_0=40 +lon_0=-96 +lat_1=20
+lat_2=60 +x_0=0 +y_0=0 +ellps=GRS80 +step +inv +proj=hgridshift
+grids=NA83SCRS.GSB +step +proj=aea +lat_0=40 +lon_0=-96 +lat_1=20
+lat_2=60 +x_0=0 +y_0=0 +ellps=GRS80
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[Qgis-user] Styling Issues with Graduated Styling

[Michael Treglia]

Hi All,

I was recently noticing an issue when applying graduated styling to a layer
based on a field. Basically, in some instances the lower bounds for the
lower-most class were rounded up slightly at the nth decimal place, so the
feature with that lowest value was not actually shown. And on the flip
side, on occasion the uppermost value for the uppermost bin gets rounded
down slightly, such that the feature with the highest value doesn't get
displayed.

The the data admittedly have an unnecessary level of precision, but I don't
think I noticed this issue with similar datasets until recently, and it
would be ideal to not have to adjust fields a all just so they can be
reliably displayed.

I'm happy to file a bug, but figured I'd raise it here. If it's a known
issue and such, that's good to know also.  Of course if it sounds like I
might be doing something wrong, happy to listen to advice too :-)

Thanks everyone! Best regards
Mike
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Re: [Qgis-user] Potential Bug in writing gpkg from database manager?

[Michael Treglia]

I'll file a bug when I can deal with an issue logging into the issue
tracker system, but if somebody else can do it quickly and beats it to me,
just report back. Thanks all!

On Fri, Oct 5, 2018 at 4:29 PM Michael Treglia  wrote:

> Alright - I get the exact same issue in the nightly dev version.  I
> thought it might have been because I didn't have a primary key in the
> postgis table, but had the same issue for a table that did have a primary
> key.
>
> On Fri, Oct 5, 2018 at 4:16 PM Luigi Pirelli  wrote:
>
>> exactly
>>
>> Luigi Pirelli
>>
>>
>> **
>> * LinkedIn: https://www.linkedin.com/in/luigipirelli
>> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
>> * GitHub: https://github.com/luipir
>> * Mastering QGIS 2nd Edition:
>> *
>> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
>> * Hire me: http://goo.gl/BYRQKg
>>
>> **********
>>
>>
>> On Fri, 5 Oct 2018 at 22:12, Michael Treglia  wrote:
>>
>>> Just to clarify, if installing via OSGeo4w, use QGIS-Dev: QGIS Nightly
>>> build of the development branch (3.3.0-88)?
>>>
>>>
>>>
>>> On Fri, Oct 5, 2018 at 4:08 PM Luigi Pirelli  wrote:
>>>
>>>> may you check with master? 3.2 is at end of life.
>>>>
>>>> tnx
>>>>
>>>> Luigi Pirelli
>>>>
>>>>
>>>> **
>>>> * LinkedIn: https://www.linkedin.com/in/luigipirelli
>>>> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
>>>> * GitHub: https://github.com/luipir
>>>> * Mastering QGIS 2nd Edition:
>>>> *
>>>> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
>>>> * Hire me: http://goo.gl/BYRQKg
>>>>
>>>> **
>>>>
>>>>
>>>> On Fri, 5 Oct 2018 at 21:59, Michael Treglia 
>>>> wrote:
>>>>
>>>>> Whoops! Forgot the key information:
>>>>> (Running on Windows 7 Pro x64)
>>>>>
>>>>> QGIS version
>>>>>
>>>>> 3.2.3-Bonn
>>>>>
>>>>> QGIS code revision
>>>>>
>>>>> 9b176802e5 <https://github.com/qgis/QGIS/commit/9b176802e5>
>>>>>
>>>>> Compiled against Qt
>>>>>
>>>>> 5.9.2
>>>>>
>>>>> Running against Qt
>>>>>
>>>>> 5.9.2
>>>>>
>>>>> Compiled against GDAL/OGR
>>>>>
>>>>> 2.2.4
>>>>>
>>>>> Running against GDAL/OGR
>>>>>
>>>>> 2.2.4
>>>>>
>>>>> Compiled against GEOS
>>>>>
>>>>> 3.6.1-CAPI-1.10.1
>>>>>
>>>>> Running against GEOS
>>>>>
>>>>> 3.6.1-CAPI-1.10.1 r0
>>>>>
>>>>> PostgreSQL Client Version
>>>>>
>>>>> 9.2.4
>>>>>
>>>>> SpatiaLite Version
>>>>>
>>>>> 4.3.0
>>>>>
>>>>> QWT Version
>>>>>
>>>>> 6.1.3
>>>>>
>>>>> QScintilla2 Version
>>>>>
>>>>> 2.10.1
>>>>>
>>>>> PROJ.4 Version
>>>>>
>>>>> 493
>>>>>
>>>>> On Fri, Oct 5, 2018 at 4:00 PM Michael Treglia 
>>>>> wrote:
>>>>>
>>>>>> Hi All,
>>>>>>
>>>>>> Just checking if others are observing something similar:
>>>>>> * I was writing data to gpkg files from a postgis database.from the
>>>>>> Database Manager. (e.g., select a layer from the PostGIS database and hit
>>>>>> the "export to file" button at the top.
>>>>>> * The resulting gpkg layer loses data in a column towards the left,
>>>>>> but all of the headings are maintained. Thus, data are shifted to the 
>>>>>> left
>>>>>> one column from a certain point on, and the last column has NULLs.
>>>>>>
>>>>>> If writing into an existing gpkg file, dragging and dropping the
>>>>>> layer from the PostGIS db into the gpkg file and selecting appropriate
>>>>>> options in the dialogue box that pops up does not have that issue.
>>>>>>
>>>>>> I'm still trying to see exactly what's going on, but figured I'd see
>>>>>> if this is something others are experiencing (or if it's already been
>>>>>> reported).
>>>>>>
>>>>>> Mike
>>>>>>
>>>>>> ___
>>>>> Qgis-user mailing list
>>>>> Qgis-user@lists.osgeo.org
>>>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>>>
>>>>
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Re: [Qgis-user] Potential Bug in writing gpkg from database manager?

[Michael Treglia]

Alright - I get the exact same issue in the nightly dev version.  I thought
it might have been because I didn't have a primary key in the postgis
table, but had the same issue for a table that did have a primary key.

On Fri, Oct 5, 2018 at 4:16 PM Luigi Pirelli  wrote:

> exactly
>
> Luigi Pirelli
>
>
> **
> * LinkedIn: https://www.linkedin.com/in/luigipirelli
> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
> * GitHub: https://github.com/luipir
> * Mastering QGIS 2nd Edition:
> *
> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
> * Hire me: http://goo.gl/BYRQKg
>
> ******
>
>
> On Fri, 5 Oct 2018 at 22:12, Michael Treglia  wrote:
>
>> Just to clarify, if installing via OSGeo4w, use QGIS-Dev: QGIS Nightly
>> build of the development branch (3.3.0-88)?
>>
>>
>>
>> On Fri, Oct 5, 2018 at 4:08 PM Luigi Pirelli  wrote:
>>
>>> may you check with master? 3.2 is at end of life.
>>>
>>> tnx
>>>
>>> Luigi Pirelli
>>>
>>>
>>> **
>>> * LinkedIn: https://www.linkedin.com/in/luigipirelli
>>> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
>>> * GitHub: https://github.com/luipir
>>> * Mastering QGIS 2nd Edition:
>>> *
>>> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
>>> * Hire me: http://goo.gl/BYRQKg
>>>
>>> **
>>>
>>>
>>> On Fri, 5 Oct 2018 at 21:59, Michael Treglia  wrote:
>>>
>>>> Whoops! Forgot the key information:
>>>> (Running on Windows 7 Pro x64)
>>>>
>>>> QGIS version
>>>>
>>>> 3.2.3-Bonn
>>>>
>>>> QGIS code revision
>>>>
>>>> 9b176802e5 <https://github.com/qgis/QGIS/commit/9b176802e5>
>>>>
>>>> Compiled against Qt
>>>>
>>>> 5.9.2
>>>>
>>>> Running against Qt
>>>>
>>>> 5.9.2
>>>>
>>>> Compiled against GDAL/OGR
>>>>
>>>> 2.2.4
>>>>
>>>> Running against GDAL/OGR
>>>>
>>>> 2.2.4
>>>>
>>>> Compiled against GEOS
>>>>
>>>> 3.6.1-CAPI-1.10.1
>>>>
>>>> Running against GEOS
>>>>
>>>> 3.6.1-CAPI-1.10.1 r0
>>>>
>>>> PostgreSQL Client Version
>>>>
>>>> 9.2.4
>>>>
>>>> SpatiaLite Version
>>>>
>>>> 4.3.0
>>>>
>>>> QWT Version
>>>>
>>>> 6.1.3
>>>>
>>>> QScintilla2 Version
>>>>
>>>> 2.10.1
>>>>
>>>> PROJ.4 Version
>>>>
>>>> 493
>>>>
>>>> On Fri, Oct 5, 2018 at 4:00 PM Michael Treglia 
>>>> wrote:
>>>>
>>>>> Hi All,
>>>>>
>>>>> Just checking if others are observing something similar:
>>>>> * I was writing data to gpkg files from a postgis database.from the
>>>>> Database Manager. (e.g., select a layer from the PostGIS database and hit
>>>>> the "export to file" button at the top.
>>>>> * The resulting gpkg layer loses data in a column towards the left,
>>>>> but all of the headings are maintained. Thus, data are shifted to the left
>>>>> one column from a certain point on, and the last column has NULLs.
>>>>>
>>>>> If writing into an existing gpkg file, dragging and dropping the layer
>>>>> from the PostGIS db into the gpkg file and selecting appropriate options 
>>>>> in
>>>>> the dialogue box that pops up does not have that issue.
>>>>>
>>>>> I'm still trying to see exactly what's going on, but figured I'd see
>>>>> if this is something others are experiencing (or if it's already been
>>>>> reported).
>>>>>
>>>>> Mike
>>>>>
>>>>> ___
>>>> Qgis-user mailing list
>>>> Qgis-user@lists.osgeo.org
>>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>>
>>>
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Re: [Qgis-user] Potential Bug in writing gpkg from database manager?

[Michael Treglia]

Just to clarify, if installing via OSGeo4w, use QGIS-Dev: QGIS Nightly
build of the development branch (3.3.0-88)?



On Fri, Oct 5, 2018 at 4:08 PM Luigi Pirelli  wrote:

> may you check with master? 3.2 is at end of life.
>
> tnx
>
> Luigi Pirelli
>
>
> **
> * LinkedIn: https://www.linkedin.com/in/luigipirelli
> * Stackexchange: http://gis.stackexchange.com/users/19667/luigi-pirelli
> * GitHub: https://github.com/luipir
> * Mastering QGIS 2nd Edition:
> *
> https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition
> * Hire me: http://goo.gl/BYRQKg
>
> **********
>
>
> On Fri, 5 Oct 2018 at 21:59, Michael Treglia  wrote:
>
>> Whoops! Forgot the key information:
>> (Running on Windows 7 Pro x64)
>>
>> QGIS version
>>
>> 3.2.3-Bonn
>>
>> QGIS code revision
>>
>> 9b176802e5 <https://github.com/qgis/QGIS/commit/9b176802e5>
>>
>> Compiled against Qt
>>
>> 5.9.2
>>
>> Running against Qt
>>
>> 5.9.2
>>
>> Compiled against GDAL/OGR
>>
>> 2.2.4
>>
>> Running against GDAL/OGR
>>
>> 2.2.4
>>
>> Compiled against GEOS
>>
>> 3.6.1-CAPI-1.10.1
>>
>> Running against GEOS
>>
>> 3.6.1-CAPI-1.10.1 r0
>>
>> PostgreSQL Client Version
>>
>> 9.2.4
>>
>> SpatiaLite Version
>>
>> 4.3.0
>>
>> QWT Version
>>
>> 6.1.3
>>
>> QScintilla2 Version
>>
>> 2.10.1
>>
>> PROJ.4 Version
>>
>> 493
>>
>> On Fri, Oct 5, 2018 at 4:00 PM Michael Treglia 
>> wrote:
>>
>>> Hi All,
>>>
>>> Just checking if others are observing something similar:
>>> * I was writing data to gpkg files from a postgis database.from the
>>> Database Manager. (e.g., select a layer from the PostGIS database and hit
>>> the "export to file" button at the top.
>>> * The resulting gpkg layer loses data in a column towards the left, but
>>> all of the headings are maintained. Thus, data are shifted to the left one
>>> column from a certain point on, and the last column has NULLs.
>>>
>>> If writing into an existing gpkg file, dragging and dropping the layer
>>> from the PostGIS db into the gpkg file and selecting appropriate options in
>>> the dialogue box that pops up does not have that issue.
>>>
>>> I'm still trying to see exactly what's going on, but figured I'd see if
>>> this is something others are experiencing (or if it's already been
>>> reported).
>>>
>>> Mike
>>>
>>> ___
>> Qgis-user mailing list
>> Qgis-user@lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
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Re: [Qgis-user] Potential Bug in writing gpkg from database manager?

[Michael Treglia]

As a quick follow-up - it seems like maybe the first numeric or integer
column gets assigned to an FID column, but the original column name stays
there with all values from other numeric/integer columns ending up
apparently shifted over to the left one, because there's an extra column.

On Fri, Oct 5, 2018 at 4:01 PM Michael Treglia  wrote:

> Whoops! Forgot the key information:
> (Running on Windows 7 Pro x64)
>
> QGIS version
>
> 3.2.3-Bonn
>
> QGIS code revision
>
> 9b176802e5 <https://github.com/qgis/QGIS/commit/9b176802e5>
>
> Compiled against Qt
>
> 5.9.2
>
> Running against Qt
>
> 5.9.2
>
> Compiled against GDAL/OGR
>
> 2.2.4
>
> Running against GDAL/OGR
>
> 2.2.4
>
> Compiled against GEOS
>
> 3.6.1-CAPI-1.10.1
>
> Running against GEOS
>
> 3.6.1-CAPI-1.10.1 r0
>
> PostgreSQL Client Version
>
> 9.2.4
>
> SpatiaLite Version
>
> 4.3.0
>
> QWT Version
>
> 6.1.3
>
> QScintilla2 Version
>
> 2.10.1
>
> PROJ.4 Version
>
> 493
>
> On Fri, Oct 5, 2018 at 4:00 PM Michael Treglia  wrote:
>
>> Hi All,
>>
>> Just checking if others are observing something similar:
>> * I was writing data to gpkg files from a postgis database.from the
>> Database Manager. (e.g., select a layer from the PostGIS database and hit
>> the "export to file" button at the top.
>> * The resulting gpkg layer loses data in a column towards the left, but
>> all of the headings are maintained. Thus, data are shifted to the left one
>> column from a certain point on, and the last column has NULLs.
>>
>> If writing into an existing gpkg file, dragging and dropping the layer
>> from the PostGIS db into the gpkg file and selecting appropriate options in
>> the dialogue box that pops up does not have that issue.
>>
>> I'm still trying to see exactly what's going on, but figured I'd see if
>> this is something others are experiencing (or if it's already been
>> reported).
>>
>> Mike
>>
>>
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Re: [Qgis-user] Potential Bug in writing gpkg from database manager?

[Michael Treglia]

Whoops! Forgot the key information:
(Running on Windows 7 Pro x64)

QGIS version

3.2.3-Bonn

QGIS code revision

9b176802e5 <https://github.com/qgis/QGIS/commit/9b176802e5>

Compiled against Qt

5.9.2

Running against Qt

5.9.2

Compiled against GDAL/OGR

2.2.4

Running against GDAL/OGR

2.2.4

Compiled against GEOS

3.6.1-CAPI-1.10.1

Running against GEOS

3.6.1-CAPI-1.10.1 r0

PostgreSQL Client Version

9.2.4

SpatiaLite Version

4.3.0

QWT Version

6.1.3

QScintilla2 Version

2.10.1

PROJ.4 Version

493

On Fri, Oct 5, 2018 at 4:00 PM Michael Treglia  wrote:

> Hi All,
>
> Just checking if others are observing something similar:
> * I was writing data to gpkg files from a postgis database.from the
> Database Manager. (e.g., select a layer from the PostGIS database and hit
> the "export to file" button at the top.
> * The resulting gpkg layer loses data in a column towards the left, but
> all of the headings are maintained. Thus, data are shifted to the left one
> column from a certain point on, and the last column has NULLs.
>
> If writing into an existing gpkg file, dragging and dropping the layer
> from the PostGIS db into the gpkg file and selecting appropriate options in
> the dialogue box that pops up does not have that issue.
>
> I'm still trying to see exactly what's going on, but figured I'd see if
> this is something others are experiencing (or if it's already been
> reported).
>
> Mike
>
>
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[Qgis-user] Potential Bug in writing gpkg from database manager?

[Michael Treglia]

Hi All,

Just checking if others are observing something similar:
* I was writing data to gpkg files from a postgis database.from the
Database Manager. (e.g., select a layer from the PostGIS database and hit
the "export to file" button at the top.
* The resulting gpkg layer loses data in a column towards the left, but all
of the headings are maintained. Thus, data are shifted to the left one
column from a certain point on, and the last column has NULLs.

If writing into an existing gpkg file, dragging and dropping the layer from
the PostGIS db into the gpkg file and selecting appropriate options in the
dialogue box that pops up does not have that issue.

I'm still trying to see exactly what's going on, but figured I'd see if
this is something others are experiencing (or if it's already been
reported).

Mike
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Re: [Qgis-user] PGRaster users

[Michael Treglia]

I'd be happy to try if you have specific data and workflows. Might be a
couple of weeks, let me know what you're thinking.

Please pardon any typos, this message was sent from a mobile device.

On Sat, Sep 15, 2018, 7:15 AM Paolo Cavallini  wrote:

> Hi Michael,
>
>
> Il 09/15/2018 01:11 PM, Michael Treglia ha scritto:
> > Hmm, I'm curious to learn more about the issues you are describing. I
> > have my rasters stored as in-db rasters, and have no prob bringing
> > them into QGIS for visualization. And I haven't done much processing
> > of the in QGIS, but have used zonal histogram of a categorical
> > (integer) raster by polygon, as a bug with ST_Clip in PostGIS made it
> > impossible for me to do a similar process there. (Spot checks
> > indicated I was getting proper results).  This has all been with QGIS
> 3.2.
> thanks for the feedback, and for the good news. Would you be available
> to cross check our results?
> All the best.
>
> --
> Paolo Cavallini - www.faunalia.eu
> QGIS.ORG Chair:
> http://planet.qgis.org/planet/user/28/tag/qgis%20board/
>
>
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Re: [Qgis-user] PGRaster users

[Michael Treglia]

Hmm, I'm curious to learn more about the issues you are describing. I have
my rasters stored as in-db rasters, and have no prob bringing them into
QGIS for visualization. And I haven't done much processing of the in QGIS,
but have used zonal histogram of a categorical (integer) raster by polygon,
as a bug with ST_Clip in PostGIS made it impossible for me to do a similar
process there. (Spot checks indicated I was getting proper results).  This
has all been with QGIS 3.2.

Cheers,
Mike

Please pardon any typos, this message was sent from a mobile device.

On Sat, Sep 15, 2018, 6:52 AM Paolo Cavallini  wrote:

> Hi Michael,
>
>
> Il 09/15/2018 12:46 PM, Michael Treglia ha scritto:
> > Hi Paolo,
> >
> > I use PostGIS rasters... Any questions in mind?
> >
> thanks for your reply. On QGIS 3.2 I found a number of important
> limitations in PGRaster handling, including some critical, long standing
> bugs. For me they are almost unusable in QGIS. I'm curious whether
> someone has solved this, or has found good workarounds.
> All the best.
>
> --
> Paolo Cavallini - www.faunalia.eu
> QGIS.ORG Chair:
> http://planet.qgis.org/planet/user/28/tag/qgis%20board/
>
>
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Re: [Qgis-user] PGRaster users

[Michael Treglia]

Hi Paolo,

I use PostGIS rasters... Any questions in mind?

Best,
Mike

Please pardon any typos, this message was sent from a mobile device.

On Sat, Sep 15, 2018, 4:57 AM Paolo Cavallini  wrote:

> Hi all,
>
> I'd be happy knowing whether there are PostGIS Raster users around.
>
> Thanks.
>
> --
> Paolo Cavallini - www.faunalia.eu
> QGIS.ORG Chair:
> http://planet.qgis.org/planet/user/28/tag/qgis%20board/
>
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Re: [Qgis-user] Simple Vector-Editing Question - Deleting Multiple Rings at Once

[Michael Treglia]

Hi Delaz, Nicholas,

Thanks so much for the responses!

Delaz - your solution works - not sure if it's quicker/simpler to click on
the rings using the 'delete ring' tool, but it's a smart alternative option.

Nicholas - I think the challenge is that you can select the objects, but I
couldn't figure out a way to select rings for a bulk deletion, as it's more
about removing the holes (and selecting the bounding vertices) than
selecting the objects themselves. I'm happy to learn if I was just missing
something.

On a related note - for the Shape Digitizing toolbar, those tools only work
to create new polygons, not new parts of a multipolygon, correct? Or is
there a way to do that I've been missing? (I know you can merge tool in
this case as well, but figured I'd check).

Thanks!
Mike

On Wed, Sep 12, 2018 at 12:12 PM Nicolas Cadieux <
nicolas.cadi...@archeotec.ca> wrote:

> Hi,
>
> You have various selection tools in the GUI. (yellow box Icon with an
> arrow).  If you use shift + left mouse click, you can add to the current
> selection.  I think it is Ctlt + left mouse click in some version of QGIS.
>
> Nicolas
>
> On 2018-09-12 11:12 AM, Michael Treglia wrote:
>
> Hi All,
>
> I'm doing some work that entails fixing up some digitization based on
> per-pixel image classification. Sometimes there are polygons with lots of
> rings contained, so I'm using the Delete  Ring tool, but that requires
> clicking on every individual ring. Is there a way to delete multiple rings
> at one time via clicking/dragging with a keyboard key held or anything like
> that?
> Thanks!
> Mike
>
>
>
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[Qgis-user] Simple Vector-Editing Question - Deleting Multiple Rings at Once

[Michael Treglia]

Hi All,

I'm doing some work that entails fixing up some digitization based on
per-pixel image classification. Sometimes there are polygons with lots of
rings contained, so I'm using the Delete  Ring tool, but that requires
clicking on every individual ring. Is there a way to delete multiple rings
at one time via clicking/dragging with a keyboard key held or anything like
that?
Thanks!
Mike
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Re: [Qgis-user] Add new layer to existing GeoPackage file

[Michael Treglia]

Hi Rick,

Here's what I've done albeit this isn't as smooth as directly doing "save
as" to the gpkg file...:
Save the file as another file type (or another gpkg file);
You can then drag layers from the Layers panel to the .gpkg file in the
Browser panel.

I hope that helps!
Mike

On Wed, Jun 13, 2018 at 1:25 PM, Rick Rupp  wrote:

> Hi,
>
> I want to use the “Save as” function on a GeoPackage layer to save a
> reprojected copy to a new layer in the same GeoPackage file. The function
> fails with an “Error: Cannot overwrite an OGR layer in place” message. The
> same thing happens if I try to save a subset of selected features from a
> layer to the same GeoPackage file. However, if I use the ogr2ogr function
> it works nicely. Is this the expected behavior? I am updating lab exercises
> for students in my beginning GIS class, and trying to switch from
> shapefiles to GeoPackage, so I am reluctant to send students to the command
> line early in their GIS training. I am working with QGIS 3.0.3 on Windows
> 10.
> Regards, Richard
>
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Re: [Qgis-user] Quick Question on QGIS for MacOS

[Michael Treglia]

Oh, I see now - thanks! (For some reason I hadn't thought to scroll back up
in the page before... now that I do though, it's quite clear).

Best,
Mike

On Sun, May 13, 2018 at 10:18 PM, William Kyngesburye <wokl...@kyngchaos.com
> wrote:

> The disk image is what is downloaded, with a .dmg extension.
>
> I think the scrolling down to the bottom part is just a glitch in the css
> for the page, it should scroll to the top of the Mac section when it
> expands.  When a Mac user goes to the page, the Mac section expands
> correctly without scrolling to the bottom of the page.  There is no need to
> go to the All Downloads page.
>
> On May 13, 2018, at 6:53 PM, Michael Treglia <mtreg...@gmail.com> wrote:
>
> Hi All,
>
> I'm not a Mac user myself, but updating a tutorial to 3.0(.2) for new(ish)
> users and wanting to include info on where to find info for installing on
> Macs, realizing how many folks are Mac users.
>
> When I go to the main download page (https://www.qgis.org/en/site/
> forusers/download.html) and click on the box for MaxOS, it the page
> scrolls down to the bottom (presumably for users to click on the All
> Downloads page?  https://www.qgis.org/en/site/forusers/alldownloads.html)
>
> When on the All Downloads page, for MacOS (https://www.qgis.org/en/site/
> forusers/alldownloads.html#mac-os-x-macos) - it says "Installation
> instructions are in the ReadMe on the disk image.", but it's not clear to
> me where users should find the disk image file - might somebody clarify
> this?
>
> Sorry if I'm missing something obvious, and thanks in advance.
>
> Cheers,
> Mike
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> -
> William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
> http://www.kyngchaos.com/
>
> All generalizations are dangerous, even this one.
>
>
>
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[Qgis-user] Quick Question on QGIS for MacOS

[Michael Treglia]

Hi All,

I'm not a Mac user myself, but updating a tutorial to 3.0(.2) for new(ish)
users and wanting to include info on where to find info for installing on
Macs, realizing how many folks are Mac users.

When I go to the main download page (
https://www.qgis.org/en/site/forusers/download.html) and click on the box
for MaxOS, it the page scrolls down to the bottom (presumably for users to
click on the All Downloads page?
https://www.qgis.org/en/site/forusers/alldownloads.html)

When on the All Downloads page, for MacOS (
https://www.qgis.org/en/site/forusers/alldownloads.html#mac-os-x-macos) -
it says "Installation instructions are in the ReadMe on the disk image.",
but it's not clear to me where users should find the disk image file -
might somebody clarify this?

Sorry if I'm missing something obvious, and thanks in advance.

Cheers,
Mike
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[Qgis-user] Best way to create geoPDF in qgis

[Michael Treglia]

Hi All,

Working on QGIS 2.18, and in searching the web for how to export a geopdf,
most of what I'm finding is a few years old. Any guidance on the current
'best' or 'easiest' way to go from a composer or (individual vector GIS
layer?) to a georeferenced PDF that can be read by PDF Maps?

Thanks!
mike
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Re: [Qgis-user] QGIS + PostGIS in production environment

[Michael Treglia]

The other thing I might suggest is writing the postgis-users list to get
any input from there, especially on the database end of things:
https://lists.osgeo.org/mailman/listinfo/postgis-users

Hope that helps!
Cheers,
mike

On Thu, Jun 15, 2017 at 1:49 PM, Árni Geirsson  wrote:

> Hello Felipe
> I use these systems but not at this large scale and can therefore probably
> not help you, but I find the question interesting. Could you be more
> specific about the performance and reliability bottlenecks that you would
> like to address? Have you experienced problems as the number of users grows?
>
> Árni
>
>
> Árni Geirsson
> *Alta ehf* // +354 582 5000 <+354%20582%205000> // +354 897 9549
> <+354%20897%209549>
>
> On 15 June 2017 at 17:25, Cap Diniz  wrote:
>
>> Hello,
>>
>> I am from the Cartographic Production Department from the Brazilian Army,
>> and we are trying to migrate from ArcGIS to QGIS+PostGIS.
>>
>> We are currently using QGIS 2.14.15, and we mostly do data digitizing
>> over an orthoimage. We have about 50 simultaneous users in a single PostGIS
>> server, but in different databases.
>>
>> I would like to know if there are any tips to improve performance and
>> QGIS reliability, such as tuning PostgreSQL, operating systems, hardware
>> recommendations, or QGIS specifics.
>>
>>
>> Regards,
>> Felipe Diniz
>>
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Re: [Qgis-user] Confirming Problem Importing Geopackage Data?

[Michael Treglia]

Thanks Even.

I renamed layers within Arc, just for anonymity of the data, and then tried
to open the data again in QGIS 2.18.9, and it worked, so not sure what was
going on.

If I can get another demonstrable and replicable example, I'll file a
ticket.

Cheers,
mike

On Tue, Jun 6, 2017 at 2:53 PM, Even Rouault <even.roua...@spatialys.com>
wrote:

> On mardi 6 juin 2017 14:41:19 CEST Michael Treglia wrote:
>
> > Hi All,
>
> >
>
> > I have a gpkg file into which I exported a bunch of layers from ArcGIS.
>
> > When drag the gpkg file into the QGIS desktop (2.18.8 & 2.18.9), most
>
> > layers show up as not having a geometry type, though the geometries
> appears
>
> > fine in both Arc (10.3.1) and QGIS 2.14.3, on a different PC.
>
> >
>
> > Can anybody confirm that there's an issue?
>
>
>
> Please file a ticket about that with a dataset demonstrating the issue
> attached (or a link to it)
>
>
>
> Even
>
>
>
> >
>
> > I'll note my 2.18.9 was installed via OSGeo4w, compiled against GDAL
> 2.2.0;
>
> > I'm not sure how my 2.14.3 was installed, as it's on a separately-managed
>
> > server, but it's compiled against GDAL 2.0.2. (SpatialLite version 4.3 in
>
> > both cases).
>
> >
>
> > I'm not seeing this specific issue reported in the bug tracker, but might
>
> > be missing it, and wanted to make sure I'm not missing something else
>
> > obvious.
>
> >
>
> > Thanks!
>
> > Mike
>
>
>
>
>
> --
>
> Spatialys - Geospatial professional services
>
> http://www.spatialys.com
>
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[Qgis-user] Confirming Problem Importing Geopackage Data?

[Michael Treglia]

Hi All,

I have a gpkg file into which I exported a bunch of layers from ArcGIS.
When drag the gpkg file into the QGIS desktop (2.18.8 & 2.18.9), most
layers show up as not having a geometry type, though the geometries appears
fine in both Arc (10.3.1) and QGIS 2.14.3, on a different PC.

Can anybody confirm that there's an issue?

I'll note my 2.18.9 was installed via OSGeo4w, compiled against GDAL 2.2.0;
I'm not sure how my 2.14.3 was installed, as it's on a separately-managed
server, but it's compiled against GDAL 2.0.2. (SpatialLite version 4.3 in
both cases).

I'm not seeing this specific issue reported in the bug tracker, but might
be missing it, and wanted to make sure I'm not missing something else
obvious.

Thanks!
Mike
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Re: [Qgis-user] PostGIS Query - DB Manager Not Recognizing Geom Column

[Michael Treglia]

Ah, this makes perfect sense - I figured that I needed to define the
geometry type, just wasn't quite figuring out how. Nice and simple solution!
Thanks so much,
Mike

On Tue, Mar 28, 2017 at 1:40 AM, Bernhard Ströbl <bernhard.stro...@jena.de>
wrote:

> Hi,
> you need to explicitly state the geometry type and SRS in you view
> definition like this:
> CREATE OR REPLACE VIEW test.testbuff as
> SELECT gid, area_id,
> st_buffer(testshape.geom, 100)::geometry(Polygon,your_srs_code)
> as geom2 FROM test.testshape where testshape.area_id=100;
>
> could be Polygon or Multipolygon depending on the input, your_srs_code
> should be the same as testshape's
>
> QGIS can analyze geometry columns and detect the type (and probably SRS),
> however only relations with geometry fields defined in this way are listed
> in geometry_columns.
>
> Bernhard
>
>
> Am 27.03.2017 um 23:42 schrieb Michael Treglia:
>
>> Hi All,
>>
>> I'm running a PostGIS query to create a view, buffering a polygon -
>> viewing the result in DB Manager, the associated icon, rather than being
>> polygons, is a question mark, and in the info tab for the layer, I see
>> the warning ' There is no entry in geometry_columns!'
>>
>> That said, the layer actually displays fine in QGIS, and in the list of
>> fields, the appropriate column is labeled as Type 'geometry'.
>>
>> Thus, is this really a problem? And if so, any easy fixes? A sample
>> query is below:
>>
>> CREATE OR REPLACE VIEW test.testbuff as
>> SELECT gid, area_id, st_buffer(testshape.geom, 100)
>> as geom2 FROM test.testshape where testshape.area_id=100;
>>
>>
>> Thanks for any suggestions!
>> Mike
>>
>>
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>>
>
>
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[Qgis-user] PostGIS Query - DB Manager Not Recognizing Geom Column

[Michael Treglia]

Hi All,

I'm running a PostGIS query to create a view, buffering a polygon - viewing
the result in DB Manager, the associated icon, rather than being polygons,
is a question mark, and in the info tab for the layer, I see the warning '
There is no entry in geometry_columns!'

That said, the layer actually displays fine in QGIS, and in the list of
fields, the appropriate column is labeled as Type 'geometry'.

Thus, is this really a problem? And if so, any easy fixes? A sample query
is below:

CREATE OR REPLACE VIEW test.testbuff as
SELECT gid, area_id, st_buffer(testshape.geom, 100)
as geom2 FROM test.testshape where testshape.area_id=100;


Thanks for any suggestions!
Mike
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Re: [Qgis-user] QGIS airlines: connecting airports with lines ?

[Michael Treglia]

Also, there were a couple of blog posts from Anita Graser recently that
look relevant (disclaimer: I have not yet given them a good read...). See
the recent posts here: https://anitagraser.com/2017/02/03/gradient-arrows/
and https://anitagraser.com/2016/12/30/new-style-flow-map-arrows/

Cheers
Mike



Please pardon any typos, this message was sent from a mobile device.

On Mar 26, 2017 7:02 PM, "Michael.Dodd"  wrote:

> The code to do this kind of thing has been in qgis for long time e.g. I
> published this map http://zookeys.pensoft.net/
> articles.php?id=4633_type=element_type=2&
> element_id=14_name= back in 2015 and had drawn it in qgis long
> time before it was published.  The difference is that the lines are
> straight not curved but in my case I wanted straight lines.
> --
> *From:* Qgis-user  on behalf of Falk
> Huettmann 
> *Sent:* 26 March 2017 00:06:18
> *To:* qgis-user
> *Subject:* [Qgis-user] QGIS airlines: connecting airports with lines ?
>
>
> Hi there,
>
> I have a question, if I may:
>
> at the following website
>
> http://openflights.org/data.html
>
> there are these maps of airlines, connecting airports.
>
> http://openflights.org/demo/openflights-routedb-2048.png
>
> The actual map and code can apparently be bought,
> but instead I am looking for a self-made solution (I do not like how
> people cash in on a GIS bottleneck).
>
> Would you perhaps know how that map can be done, e.g.
> in QGIS or related in an OpenGIS framework or code?
>
> Thanks so much; kind regards
>  Falk
>
>
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Re: [Qgis-user] Question about concurrent install of 2.x and 2.99

[Michael Treglia]

Great, Thanks Jürgen - will give it a go, and write back if I have any
issues. Looking forward to trying 3.0!
Mike

On Mon, Mar 13, 2017 at 5:03 PM, Jürgen E. Fischer <j...@norbit.de> wrote:

> Hi Michael,
>
> On Mon, 13. Mar 2017 at 16:53:14 -0400, Michael Treglia wrote:
> > Was considering adding QGIS 2.99 nightly build to my stack (via OSGeo4W
> > installer) to start exploring it, but realize it installs/uses Python 3.
> > Thus, will there be conflicts if I have 2.18.x and 2.99 installed
> > concurrently?  (Figured I'd ask before I cost myself time and added some
> > problems :-) )
>
> No - should work fine in parallel.
>
>
> Jürgen
>
> --
> Jürgen E. Fischer   norBIT GmbH Tel.
> +49-4931-918175-31
> Dipl.-Inf. (FH) Rheinstraße 13  Fax.
> +49-4931-918175-50
> Software Engineer   D-26506 Norden
> http://www.norbit.de
> QGIS release manager (PSC)  GermanyIRC: jef on FreeNode
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[Qgis-user] Question about concurrent install of 2.x and 2.99

[Michael Treglia]

Hi All,

Was considering adding QGIS 2.99 nightly build to my stack (via OSGeo4W
installer) to start exploring it, but realize it installs/uses Python 3.
Thus, will there be conflicts if I have 2.18.x and 2.99 installed
concurrently?  (Figured I'd ask before I cost myself time and added some
problems :-) )

(Sorry if I'm missing anything about this online - didn't see much in a
quick google search)

Thanks for any insights! Best,
Mike
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Re: [Qgis-user] counting fish

[Michael Treglia]

Not integrated with QGIS, but there is an R package designed to help
process images from Camera traps - possibly it could work for your
situation?
https://cran.r-project.org/web/packages/camtrapR/index.html  (the paper
describing the package can be found here::
https://www.researchgate.net/profile/Alexandre_Courtiol/publication/303794320_camtrapR_An_R_package_for_efficient_camera_trap_data_management/links/5755923e08ae155a87b99294.pdf
)

Looks like this program, Timelapse2, is also available:
http://saul.cpsc.ucalgary.ca/timelapse/

hope this helps - searches for camera trap analysis software, and similar,
might lead you to other tools like this.
Mike

On Mon, Feb 6, 2017 at 1:14 PM, Adam Dershowitz  wrote:

> Computer vision is not an easy task.  You might look into OpenCV as one
> way to get started:
> http://opencv.org
>
>
> --Adam
>
>
>
> On Feb 6, 2017, at 12:13 PM, Jake Maier  wrote:
>
> 
> Is there an easy way, even an existing plugin, to identify photos which
> show an object (fish)  swimming over a white board.
>
> I live on a river and there is a potential problem with alewives, an
> extremely important fish in the food chain. I’d like to find a way with a
> wildlife camera to take a photo at regular intervals over 3 week. The more
> photos I can handle (possibly thousands) the more accurate my count.
>
> I was hoping to find an automated way to identify those photos which show
> an object on the whitish background. I thought it should be possible to
> just look at the average gray value of the photo.
>
> Is there a fairly easy way to do this?
>
> Thanks for any help.
>
> Jake
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Re: [Qgis-user] Version of GDAL used for the windows binary on qgis site

[Michael Treglia]

If installing on Windows, you can use the OSGeo4W installer (
https://trac.osgeo.org/osgeo4w/) - and if you choose the advanced option,
you can identify (and have some control over) which versions of gdal and
other items get installed. (here's the QGIS page on the OSGeo4W installer:
https://www.qgis.org/en/site/forusers/alldownloads.html)

hope that helps!
Mike

On Thu, Jan 26, 2017 at 1:54 PM, Mike <msw...@gmail.com> wrote:

> Right, that's exactly the info I'm looking for, but I'm trying to get that
> info before installing it.
>
> Any ideas how to find that?
>
>
>
> On Jan 26, 2017 11:26 AM, "Michael Treglia" <mtreg...@gmail.com> wrote:
>
>> If you have QGIS installed and open, go to Help -> About, and it'll show
>> those details.
>> Hope that helps,
>> mike t
>>
>> On Thu, Jan 26, 2017 at 1:05 PM, Mike <msw...@gmail.com> wrote:
>>
>>> I'm looking at QGIS 2.18.3, but am trying to find the version of GDAL
>>> used for this. Where can I find it?
>>>
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Re: [Qgis-user] Version of GDAL used for the windows binary on qgis site

[Michael Treglia]

If you have QGIS installed and open, go to Help -> About, and it'll show
those details.
Hope that helps,
mike t

On Thu, Jan 26, 2017 at 1:05 PM, Mike  wrote:

> I'm looking at QGIS 2.18.3, but am trying to find the version of GDAL used
> for this. Where can I find it?
>
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Re: [Qgis-user] Non-Earth Coordinates

[Michael Treglia]

Hi Grant - good question. Looks like a similar question came up on Stack
Exchange last spring. Does it sound like this answer works for you?
http://gis.stackexchange.com/questions/187699/how-to-create-a-qgis-map-of-unprojected-data


(Ultimately the suggestion is to assign it to a UTM or foot based
coordinate system, as that should work fine for display and such - if you
find out there is a real Geographic coordinate system later, you can just
assign as appropriate).

If not, curious to hear more about the specific case you're dealing with.
mike


On Mon, Jan 16, 2017 at 9:10 PM, Grant Boxer  wrote:

> Is there an option in QGIS to select a non-earth coordinate system? This
> is useful when you get data in a local grid without a readily available
> conversion to real earth coordinates. There is this option in MapInfo and
> it is really handy when dealing with old data. The “local grid” can then be
> transformed later when a  conversion can be determined.
>
>
>
> Grant Boxer
>
> Perth, Western Australia
>
>
>
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[Qgis-user] 3d Vector to Raster Elevation?

[Michael Treglia]

Hi All,

With 3d-vector datasets, I'm wondering if there is a good way to convert to
a raster representing height.

Case in point - 3-D Building data for NYC:
http://www1.nyc.gov/site/doitt/initiatives/3d-building.page

The ESRI Multipatch format comes as gdb files, which I can import into
QGIS, and it seems to recognize the z coords (QGIS will style, more or
less, with the 2.5 styling). But, I would love to have a raster layer
simply representing the height above ground. (everything else either 0 or
nodata).

Any thoughts on how to do this? Is it possible/am I missing something
obvious? (Open to other tools outside of QGIS, but greatly prefer OSS)

Thanks!
Mike
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Re: [Qgis-user] QGIS vs ArcGIS in Education and Practice

[Michael Treglia]

In my training, one thing I found immensely valuable, was even a small
amount of cross-training. For example, if the course is primarily given
with Arc, showing students how easily similar operations can be conducted
in a differnent tool - your course might give 'proficiency' in a main tool
of focus, but also a 'working knowledge' of other tools (I originally
learned primarily in Manifold GIS, with some Arc sprinkled in by the
professor). I think the titles of different software packages that exist
can be a hinderance and overwhelming, particularly to new GIS users who
'only learned on Arc/QGIS'. Thus, even a small bit of cross training can go
a long way - both in terms of actual knowledge and working confidence to
try new things.

hope that helps.
best,
Mike

On Thu, Dec 15, 2016 at 2:31 PM, Jochen Albrecht 
wrote:

>
> It really depends on who your audience is, Markus.
> In general, the advice that you got is (still) true but:
> I am not aware of any GIS program from small consultancies to large
> multi-hundred seats enterprise systems that don't now also use QGIS.
> I have put this question to employers as part of a graduate class, where
> in the course of 15 weeks, we visited a range of GIS employers once a week.
> Without exception, they told me that we would be remiss if we skipped
> ArcGIS completely. But they also, unanimously (public, private, and
> non-profit) were adamant that if we don't teach our students open source
> software that we would be doing our students a disservice.
> So, if this is only one course, and if the audience is in wealthy
> countries, then the answer is ArcGIS. If your audience is people who cannot
> afford commercial licenses or organizations that are just starting to get
> into the GIS business, then the answer would be QGIS. If you are offering
> more than one course, then I would recommend to teach both.
> Cheers,
>Jochen
>
> Dr. Jochen Albrecht
> Computational and Theoretical Geography
> Hunter College CUNY
> 695 Park Avenue
> New York, NY 10065
>
> On Thu, Dec 15, 2016 at 2:07 PM, Markus Weidenbach  > wrote:
>
>> Dear List,
>>
>> I was asked to give a 5 days international GIS training course at the
>> university and proposed to do it with QGIS. The program leader finally
>> insisted on doing it with ArcGIS arguing  that the students had better
>> chances to find a job knowing ArcGIS rather than QGIS. This argumentation
>> does not reflect my long professional experience as a GIS consultant at all!
>> But how can I proof that knowing QGIS is the better choice for young GIS
>> professionals than ArcGIS (or at least that both systems are equally
>> suited)?
>> Does anybody know any official numbers of GIS users worldwide or on the
>> worldwide application of QGIS over ArcGIS?
>>
>> I know the Master thesis from Boku Vienna (https://geoobserver.wordpress
>> .com/2016/02/09/arcgis-vs-qgis/) but it is focused on a technical
>> comparison of both systems only.
>> Also the link https://www.g2crowd.com/grid_r
>> eport/documents/gis-winter-2016-report is not really helpful because it
>> is based on some 40 reviews only and therefore not representative.
>> I really need to know some proven facts on the number of global QGIS
>> users and renown companies using QGIS worldwide.
>>
>> Thanks for your help in advance,
>> Markus
>>
>> --
>> Dr. Markus Weidenbach
>> *landConsult.de*
>> Geographical Information Management
>> and Environmental Planning
>> D-77815 Bühl
>> Germany
>> e.mail see: http://landConsult.de
>>
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Re: [Qgis-user] New user problems

[Michael Treglia]

Also, for what it's worth, I developed the tutorial you're referencing (
http://mltconsecol.github.io/QGIS-Tutorial/).  Note-  it hasn't been
updated since version 2.12 (when I was last developing it for teaching
material) - thus, the operations should generally work as described, but
there may have been slight changes since 2.12.

If you notice anything that straight-up doesn't work the same or similar
with a newer version of QGIS, let me know directly (this e-mail address is
fine) or file it as a bug report in Github:
https://github.com/mltConsEcol/QGIS-Tutorial/issues

I have no immediate plans to update the tutorial, but will keep track of
these things and fix as I can/when I need to develop further for some
reason.

Cheers,
Mike



On Wed, Dec 7, 2016 at 7:31 PM, DelazJ  wrote:

> Hi,
>
> welcome to QGIS! Comments inline.
>
> 2016-12-08 0:56 GMT+01:00 G A Sansom :
>
>> OK. I am new to QGIS, but not so new to GIS in general.
>>
>> Using 2.14.7 Essen and working through the QGIS-2.14-UserGuide-en.pdf
>>
>> and a tutorial that I found on the web (Treglia_QGIS_Tutorial_2_12.pdf)
>>
>>
>>
>> I have 3 problems (so far!)
>>
>>
>>
>> 1)  When setting Relations (in the Project Properties) and creating a
>> new
>>
>> Relation with a name but nothing else, QGIS throws a dump (30+ meg)
>>
>> and sometimes simply quits at that time.
>>
>> Getting past this, so far I haven’t been able to see anything useful with
>>
>> this feature.
>>
>>
>>
> Maybe should you read http://docs.qgis.org/2.14/en/
> docs/user_manual/working_with_vector/attribute_table.html#
> creating-one-to-many-relations to see what the relations are designed for.
>
>
>> 2)  Occasionally, when attempting to set symbology properties for a
>>
>> Polygon shape file, QGIS starts treating the shape file like a LINE shape.
>>
>> Even though it is a Polygon, only allowing line type symbology.  It also
>>
>> does NOT display anything of the data while doing this.
>>
>> I am certain that it is a Polygon;  for a while it did display the layer
>> and
>>
>> allowed me to set a fill color.
>>
>> Additionally, it allowed me to make a data column and fill it with $area,
>>
>> which I assume that it would not allow if it was an unclosed line.
>>
>> The only work-around that I can find is to remove the offending layer
>>
>> and to bring it back into the project.  If you have already placed in
>> into
>>
>> the Print Composer, this is more than a little inconvenient.
>>
>>
>>
> Weird! No idea
>
>
>> 3)  Using the Print Composer, I built a map, then built an inset map to
>>
>> show the big picture.  When I attempted to export the composition, as
>>
>> image, pdf or jpg it seems to refresh all of the maps on the page.  This
>>
>> makes it impossible to create the composition a single page production
>>
>> map.
>>
>> I have not found any work-around for this.
>>
>
> You can fix the content of each map item by checking "Lock layers for map
> items" in its properties tab or creating a layer preset.
> See http://docs.qgis.org/2.14/en/docs/user_manual/print_
> composer/composer_items/composer_map.html#main-properties
>
> HTH,
> Harrissou
>
>>
>>
>> This last item, with no work-around, is a show stopper.
>>
>>
>>
>> Alan
>>
>>
>> --
>> [image: Avast logo]
>> 
>>
>> This email has been checked for viruses by Avast antivirus software.
>> www.avast.com
>> 
>>
>>
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Re: [Qgis-user] QGis and Mac hardware

[Michael Treglia]

There actually is a plugin to call on NVIDIA CUDA-enabled GPUs, called CUDA
Raster - not sure if it will work on Macs, as it is 'Only tested to work on
linux machines', but worth looking into

You can find the project in the plugin repository; the github page for it
is here: https://github.com/aFuerst/PyCUDA-Raster and there's a blog post
about it by Art Lembo here:
https://artlembo.wordpress.com/2016/07/22/qgis-gpu-processing-update/#more-1941

hope that helps,
mike

On Mon, Nov 7, 2016 at 1:34 PM, Even Rouault 
wrote:

> Le lundi 07 novembre 2016 19:18:33, Nicolas Cadieux a écrit :
> > Hi,
> >
> > Currently GPU acceleration is not used.  Maybe some plugins can use it
> but
> > I have not seen anything yet.  I have put in a request to use GPU for the
> > qgis 3.0 raster calculator as it needs to be upgraded for huge rasters.
> > Currently , the qgis raster calculator can not handle big rasters.  The
> > new version needs to break up the raster into smaller chucks and if you
> > have done that, you might as well use the multi CPU ou GPU to do the
> rest.
> >  I an hopping this will be fixed for 3.0.  Rendering is multithreaded and
> > will be faster the more cores you have.  Personally, I would go for the
> > quad core without even thinking for this and other softwares.  I would
> > think of getting an ssd also.  I have not used qgis on a MAC (PC and
> > ubuntu only) but I expect this comment  to be valid for Macs also.
>
> If you use gdalwarp, with GDAL configured with OpenCL (which is rarely the
> case
> for most standard binary builds), you can get GPU acceleration for non
> nearest
> neighbour resampling. Although currently the gain is generally modest (or
> even
> slower) w.r.t multi-threaded acceleration, and you may face issues with
> buggy
> OpenCL drivers. Might be that the OpenCL code path isn't completely
> optimized
> too as it is still rather experimental.
>
> >
> > Nicolas
> >
> > > Le 7 nov. 2016 à 11:12, Matthias Kuhn-2 [via OSGeo.org]
> > >  a écrit :
> > >
> > > Hi
> > >
> > > On 11/07/2016 05:02 PM, Square Cube wrote:
> > > >> I am looking to update some hardware and am trying to evaluate what
> > > >> performance difference in QGis might be gained from the options
> > > >> currently on offer from Apple.  I have two specific questions:
> > > >>
> > > >> - Does QGis have GPU acceleration features that leave the graphics
> > > >> card to perform certain calculations, instead of the CPU?
> > >
> > > No
> > >
> > > >> - Does QGis take advantage of multiple cores and / or multithreaded
> > > >> rendering?
> > >
> > > Yes, and it is expected that it will make even more use of multiple
> > > cores in the upcoming QGIS 3.0 version.
> > >
> > > Matthias
> > >
> > > >> I am trying to understand if it would be worth my while investing
> in a
> > > >> 15" MacBookPro (with quad core CPU and discreet graphics card) over
> a
> > > >> 13" MacBook Pro (with dual core CPU and integrated graphics).
> > > >>
> > > >> Very grateful for any advice.
> > > >
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> > > below:
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Re: [Qgis-user] Question on Rotating Map in Print Composer

[Michael Treglia]

Ah, just figured it out - in the 'Main Properties' for the map object,
there's the 'Map Rotation' area, which is what I want to be using... (I was
previously looking at the separate 'Rotation' section for the broader Item
Properties of the map object, which didn't confine things in the same way.)

Learning new stuff every day :-). Glad to find this so easy to do!

On Thu, Oct 13, 2016 at 4:35 PM, Michael Treglia <mtreg...@gmail.com> wrote:

> Hi All,
>
> I'm working to create a map of a pretty linear area that runs ~30 degrees
> off of N.
>
> In addition to the focal area, I have some bordering regions (e.g.,
> counties) that I want displayed, just to help show context. .
>
> I was playing around with rotating the map in the print composer, and it
> seems that if I want any blank-space border around the map, I would need to
> clip all of the surrounding layers appropriately first, right? (otherwise
> the corners of the original rotated map stick out...)
>
> Or is there some way rotate the area and clip off the boundaries of a
> certain extent entirely within the composer?
>
> Just as an example, think of this NYC map (which is rotated off-North),
>  if it had a blank border around it.
>
> Thanks! Curious to hear how others have dealt with this kind of question
> before.
> Mike
>
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[Qgis-user] Question on Rotating Map in Print Composer

[Michael Treglia]

Hi All,

I'm working to create a map of a pretty linear area that runs ~30 degrees
off of N.

In addition to the focal area, I have some bordering regions (e.g.,
counties) that I want displayed, just to help show context. .

I was playing around with rotating the map in the print composer, and it
seems that if I want any blank-space border around the map, I would need to
clip all of the surrounding layers appropriately first, right? (otherwise
the corners of the original rotated map stick out...)

Or is there some way rotate the area and clip off the boundaries of a
certain extent entirely within the composer?

Just as an example, think of this NYC map (which is rotated off-North),  if
it had a blank border around it.

Thanks! Curious to hear how others have dealt with this kind of question
before.
Mike
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Re: [Qgis-user] Database options

[Michael Treglia]

GeoPackage might have some utility - especially in being able to package up
data and share it (http://www.geopackage.org/). I haven't used it at all,
but have thought about it as I'm trying to make data more usable across
users and platforms...  (It stores data in a SQLite db, and has support via
GDAL/QGIS, ESRI, and many other interfaces.)

Hope that helps - I'd be curious to hear others' experiences in working
with GeoPackage dbs
Mike

On Fri, Sep 30, 2016 at 2:37 PM, Tyler Veinot 
wrote:

> That was my thought for a solution, do the data entry in QGIS and use that
> as the primary got to for entry and data retrieval using data entry forms
> and widgets. Issue has been the m:n relationships. I downloaded postgreSQL
> portable to try and since upgrading to 2.16.3 I have not tried my SQLite
> forms to see if they work better as of yet; hoping to get to it this
> weekend but I got quite a bit of work to do before I can get back to it.
> Likely going to have to go with PostgreSQL; it is the only one that works
> well with both platforms.
> Tyler
>
> On Fri, Sep 30, 2016 at 2:27 PM, Alex M 
> wrote:
>
>> I looked for this unicorn many moons ago. It sadly doesn't exist. I have
>> not found any interface quite like Access (which I have successfully
>> used via ODBC to sqlite). Libre Base comes close but there's been many
>> years of them saying they'd implement sqlite as a 1st class db and no
>> movement, they always prefer Java based solutions it seems.
>>
>> The conclusion I reached is that you need either a web or local
>> interface to your db. For data entry I looked into writing a custom
>> Python application with the widgets I wanted for data entry, a node type
>> app could work also (share code between a web interface and desktop
>> interface). One option would be to make custom forms, or a plugin for
>> QGIS and do all your data entry there.
>>
>> For writing queries there's lots of GUI tools, I usually use Spatialite
>> GUI, QGIS QSpatialite Plugin, or Firefox SQLite Manager (non-spatial
>> queries only). But both of these would be terrible for mass data entry.
>>
>> You could also, do a spreadsheet->csv->db script
>>
>> Thanks,
>> Alex
>>
>> On 09/28/2016 11:06 AM, Tyler Veinot wrote:
>> > Luigi;
>> > Thanks, I will give it a try. Also tried using using MS Access to
>> connect
>> > to the SQLite database following steps I found online using an ODBC
>> > connection. Got no useable sqlite3.dll found. It doesn't tell me where
>> it
>> > is looking or anything; the ODBC driver install did put an sqlite3.dll
>> in
>> > the system32 folder so I am not sure what the issue is, if the file is
>> not
>> > what access is looking for or if it is looking in the wrong spot for it;
>> > Libre seems to be able to find it no problem.
>> > Tyler
>> >
>> > On Wed, Sep 28, 2016 at 1:22 PM, Luigi Pirelli 
>> wrote:
>> >
>> >> Tyler may you try with latest backported bugfixes on sqlite ogr
>> >> provider? Probably related with your problem ("unable to commit
>> >> changes to the database"). Check if it is similar following these
>> >> steps: https://hub.qgis.org/issues/15351
>> >>
>> >> regards
>> >> Luigi Pirelli
>> >>
>> >> 
>> >> **
>> >> * Boundless QGIS Support/Development: lpirelli AT boundlessgeo DOT com
>> >> * LinkedIn: https://www.linkedin.com/in/luigipirelli
>> >> * Stackexchange: http://gis.stackexchange.com/u
>> sers/19667/luigi-pirelli
>> >> * GitHub: https://github.com/luipir
>> >> * Mastering QGIS:
>> >> https://www.packtpub.com/application-development/mastering-qgis
>> >> 
>> >> **
>> >>
>> >>
>> >> On 28 September 2016 at 17:54, Tyler Veinot 
>> >> wrote:
>> >>> I would prefer to go with postgre but I think that is going to have to
>> >> be a
>> >>> future project; right now we use a file geodatabase because it can be
>> >> copied
>> >>> and distributed. Some of our PC's are disconnected from a network
>> and/or
>> >>> have very limited network access. To my knowledge I cannot just copy a
>> >>> Postgres, MySQL, Maria, or other like databases to a PC or tablet and
>> run
>> >>> them. I have run Postgre as a local service doing some testing and
>> >> playing
>> >>> but I have no place to put it for everyone to access, thats why I am
>> >> looking
>> >>> for a SQLite/File geodatabase type solution.
>> >>> SQLite's only issue is that the qgsEditRelationWidget and
>> >> qgsRelationWidget
>> >>> don't seem to respond well to it. I have tried a number of different
>> >> ways to
>> >>> make those features work and it always ends in either a crash with
>> >> minidump
>> >>> or "unable to commit changes to the database". LibreBase does not
>> >>> acknowledge SQLite's capabilities as a database; tried it with both
>> JDBC
>> >> and

[Qgis-user] Fwd: [R-sig-Geo] ArcGIS File Geodatabase Format

[Michael Treglia]

Hi All,
the below e-mail came across the r-sig-geo listserv, but thought it would
be of interest to QGIS users too.
Best,
mike


-- Forwarded message --
From: Richard Barnes 
Date: Mon, Aug 29, 2016 at 4:58 PM
Subject: [R-sig-Geo] ArcGIS File Geodatabase Format
To: r-sig-...@r-project.org


I've just released C++ source code at https://github.com/r-barnes/Ar
cRasterRescue for extracting raster data from the ArcGIS File Geodatabase
(gdb) format.

Additional work, as outlined in the README.md file, needs to be done to
extend the kinds of compression the code handles, deal with issues of
endianness (the code has only been tested on a little endian system), and
better extract geotransforms and CRSs, but the program is serviceable.

I've got what I need out of this, so I don't anticipate putting too much
more active development into the program myself, but wanted to make the
community aware of it in case there are others who can benefit from it.

Best regards,
Richard

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Re: [Qgis-user] EPSG of data from Manifold?

[Michael Treglia]

I used to use Manifold a lot, as that's what I originally learned on.
Still would, but been making a concerted effort to stick with FOSS tools.
But yes, Manifold has, and seems to be further developing their GPU
capabilities.  Mike Sumner has even been developing an R package to
interface with Manifold: https://github.com/mdsumner/manifoldr



On Wed, Jul 20, 2016 at 10:13 AM, Nicolas Cadieux <
nicolas.cadi...@archeotec.ca> wrote:

> Good for you!
>
> I would like to try Manifold...  they have a lot of GPU computing I would
> like to see in Qgis.
>
> Cheers!
> Nicolas
>
> On Jul 20, 2016 09:31, "berndv. [via OSGeo.org]" <[hidden email]
> > wrote:
>
> Hi folk,
> just caught the guy responsible for the data, and he said that they were
> wrongly exported from Manifold (seems to be quite tricky), so they still
> appear on place in Manifold, but not in other systems.
>
> Received new data that fit.
>
> Thanx for helping
> Bernd
>
> Am 19.07.2016, 21:05 Uhr, schrieb Bernd Vogelgesang
> < href="/user/SendEmail.jtp?typenodenode5277349i0">[hidden
> email]>:
>
> > Hi,
> > we just received some shapes accompanied by an xml and no prj.
> > So far I was out of luck finding the proper projection for this, but I'm
>
> > guessing that this stuff is from Manifold (my first contact with that)
> >
> > Can anyone tell me from the xml what would be the related EPSG code for
>
> > this data?
> >
> > 
> > 
> > 
> > Orthographic
> > World Geodetic 1984 (WGS84)
> > Orthographic
> > Meter
> > 6.37813700e+006
> > 8.1819190842621486e-002
> > 0.e+000
> > 0.e+000
> > 0.e+000
> > 0.e+000
> > 0.e+000
> > 0.e+000
> > 0.e+000
> > 1.e+000
> > 3.17500700e+000
> > 1.e+000
> > 3.17500700e+000
> > 0.e+000
> > 4.393181425026e+006
> > 0.e+000
> > 5.437772499972e+006
> > 0.e+000
> > 0.e+000
> > 
> > 
> >
> >
> >
> > Thanx a lot
> > Bernd
> >
>
> --
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> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
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Re: [Qgis-user] How to import/convert *.ige files

[Michael Treglia]

Hi Douwe,

I've re-added the QGIS-User-List to the thread, so others can find the
answers/full thread in the archives. There's a 28 kb file that looks like
an img, though it does not have the extension displayed based on your local
pc configurations. (The icon with the file looks like an img).

To show the extension on all files, in the Control Panel (displayed as
Icons), go to Folder Options - 'View' tab, and uncheck the box for 'Hide
Extensions for Known File types'

Hope that helps -
mike


On Tue, Jun 14, 2016 at 2:55 PM, Douwe van Rees <douwevanr...@xs4all.nl>
wrote:

> Hello Mike,
>
>
>
> Thanks for your help. I downloaded the data again with the same result, no
> *.img file included. I have attached a screenshot with the data files, the
> only one I’m able to open in QGIS is a .shp file in the Metadata directory
> (apparently with the changes in land cover from 2001 to 2011, which I don’t
> need at the moment). I’m using Winrar to unzip, no particularities as far
> as I know….. I have also unzipped the compressed file using the 7-zip app,
> same results again. That’s why I don’t believe anything is wrong with the
> download, but maybe I’m mistaken. Thanks again in advance for your trouble!
>
>
>
> Best regards,
>
> Douwe
>
>
>
> *Van:* Michael Treglia [mailto:mtreg...@gmail.com]
> *Verzonden:* dinsdag 14 juni 2016 17:27
> *Aan:* Douwe van Rees <douwevanr...@xs4all.nl>
> *CC:* qgis-user@lists.osgeo.org
> *Onderwerp:* Re: [Qgis-user] How to import/convert *.ige files
>
>
>
> The file should come with a .img file - as noted in a stack exchange
> answer, "The ige file is just an indexing file to address large files
> that exceed 32bit addressing space. The file that you work with is the
> img." (
> http://gis.stackexchange.com/questions/55299/mysterious-problems-with-ige-file
> )
>
>
>
> For NLCD 2011 data, I just drag and drop the IMG file into QGIS, and it
> opens right away, with the appropriate color pallet and such.  If that
> doesn't work, maybe try re-downloading, as sometimes if a giant download
> gets interrupted it could lead to the file getting corrupted.
>
>
>
> Hope that helps!
>
> Mike
>
>
>
> On Tue, Jun 14, 2016 at 7:49 AM, Douwe van Rees <douwevanr...@xs4all.nl>
> wrote:
>
> Hi,
>
>
>
> I’m looking for a way to import Erdas image files (NLCD 2011 data) with
> *.ige (> 4 GB) in QGIS 2.14 . As I understand the *.ige is a file extension
> used for large files, I have tried to import it as a raster layer but the
> file format is not valid. Thanks for your assistance!
>
>
>
> Kind regards,
>
> Douwe van Rees
>
>
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Re: [Qgis-user] How to import/convert *.ige files

[Michael Treglia]

The file should come with a .img file - as noted in a stack exchange
answer, "The ige file is just an indexing file to address large files that
exceed 32bit addressing space. The file that you work with is the img." (
http://gis.stackexchange.com/questions/55299/mysterious-problems-with-ige-file
)

For NLCD 2011 data, I just drag and drop the IMG file into QGIS, and it
opens right away, with the appropriate color pallet and such.  If that
doesn't work, maybe try re-downloading, as sometimes if a giant download
gets interrupted it could lead to the file getting corrupted.

Hope that helps!
Mike

On Tue, Jun 14, 2016 at 7:49 AM, Douwe van Rees 
wrote:

> Hi,
>
>
>
> I’m looking for a way to import Erdas image files (NLCD 2011 data) with
> *.ige (> 4 GB) in QGIS 2.14 . As I understand the *.ige is a file extension
> used for large files, I have tried to import it as a raster layer but the
> file format is not valid. Thanks for your assistance!
>
>
>
> Kind regards,
>
> Douwe van Rees
>
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Re: [Qgis-user] Lookup Tables in File GDB?

[Michael Treglia]

Thanks all for the quick feedback! I'll give these things a try and will
report back. And for what it's worth, same issue with using both
openFileGDB and ESRI FileGDB drivers.
Cheers,
mike

On Mon, Jun 6, 2016 at 12:12 PM, Justin Robinson <j...@spatialbias.com>
wrote:

> Hi Michael,
>
> That's probably GDAL's openFileGDB driver and it's interaction with Esri's
> Coded Domains, there's an open ticket at
> https://trac.osgeo.org/gdal/ticket/5741
>
> It doesn't sound like there was any resolution to it based on other
> threads (
> http://osgeo-org.1560.x6.nabble.com/gdal-dev-OGR-How-to-access-Coded-Value-Domains-in-File-Geodatabases-td5180262.html
> ) either, it's in a GDB_Items table in the geodatabase and isn't easy to
> access without some amount of work.
>
> Not exactly an answer, but more info, cheers,
>
> Justin
>
> On Mon, Jun 6, 2016 at 8:59 AM, Michael Treglia <mtreg...@gmail.com>
> wrote:
>
>> Hi All,
>>
>> I'm trying to work with a planimetric dataset available here:
>> https://data.cityofnewyork.us/Transportation/NYC-Planimetrics/wt4d-p43d,
>> which is available in a FileGDB format.
>>
>> When I load the layers from the gdb in QGIS, some fields are field with
>> numeric values (e.g., entries in the PARK layer, for the FEATURE_CODE
>> column are integers). However, when I load the gdb in Arc, FEATURE_CODE is
>> filled with string entries (e.g,  'Park Boundary'). Thus, it seems like
>> ESRI uses a lookup table or something on this. Does anybody have experience
>> in dealing with this type of issue? Is there a good way to deal with this
>> via QGIS or OGR? (I'm ultimately wanting to import the data to PostGIS,
>> where the same issue is occurring, using org2ogr)
>>
>> Thanks!
>> Mike
>>
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[Qgis-user] Lookup Tables in File GDB?

[Michael Treglia]

Hi All,

I'm trying to work with a planimetric dataset available here:
https://data.cityofnewyork.us/Transportation/NYC-Planimetrics/wt4d-p43d,
which is available in a FileGDB format.

When I load the layers from the gdb in QGIS, some fields are field with
numeric values (e.g., entries in the PARK layer, for the FEATURE_CODE
column are integers). However, when I load the gdb in Arc, FEATURE_CODE is
filled with string entries (e.g,  'Park Boundary'). Thus, it seems like
ESRI uses a lookup table or something on this. Does anybody have experience
in dealing with this type of issue? Is there a good way to deal with this
via QGIS or OGR? (I'm ultimately wanting to import the data to PostGIS,
where the same issue is occurring, using org2ogr)

Thanks!
Mike
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Re: [Qgis-user] Standard Deviational Ellipse

[Michael Treglia]

If you're comfortable with R at all, that functionality is in the 'aspace'
package (function 'calc_sde')
https://cran.r-project.org/web/packages/aspace/

Hope that helps!
mike

On Thu, May 19, 2016 at 10:04 AM, Philip Pierdomenico 
wrote:

> I have never found an analogous tool in QGIS, but I have also used the
> standard deviational ellipse in ArcMap many times and would love to see
> something similar in QGIS.
>
>
> Phil
>
> On Thu, May 19, 2016 at 9:02 AM, Josefine Petrenz <
> josefineschm...@gmail.com> wrote:
>
>> Hi all,
>>
>> is there a tool or a plugin in qgis, that is similar to the arcgis-tool
>> "Directional Distribution (Standard Deviational Ellipse)?
>> Many Thanks in advance!
>>
>> josi
>>
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Re: [Qgis-user] Rendering Very Large Shapefile

[Michael Treglia]

Ah, didn't google hard enough before - Solved my problem by Creating
Spatial Index, following solutions here:
http://gis.stackexchange.com/questions/131996/shapefile-layers-in-qgis-dont-display-unless-i-zoom-out

Cheers and have a great weekend,
MIke

On Fri, Mar 25, 2016 at 3:57 PM, Michael Treglia <mtreg...@gmail.com> wrote:

> Hi All,
>
> I am working with a very large polygon shapefile (~100,000 objects), and
> the data import just fine, but when I zoom in, many objects just don't
> render once I zoom closer than a certain scale.  Are there any rendering
> settings I should try to adjust or anything?
>
> I tried this with 2.14 on WIndows and 2.12.3 on Ubuntu.The shapefile
> appears fine and works without issue in Arc
>
> Thanks in advance for any input!
> Cheers,
> Mike
>
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[Qgis-user] Rendering Very Large Shapefile

[Michael Treglia]

Hi All,

I am working with a very large polygon shapefile (~100,000 objects), and
the data import just fine, but when I zoom in, many objects just don't
render once I zoom closer than a certain scale.  Are there any rendering
settings I should try to adjust or anything?

I tried this with 2.14 on WIndows and 2.12.3 on Ubuntu.The shapefile
appears fine and works without issue in Arc

Thanks in advance for any input!
Cheers,
Mike
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Re: [Qgis-user] PROBLEM IN RUNNING DEM

[Michael Treglia]

Hi Ashish,

Can you please elaborate on what you did? What tool were you using, and
exactly what was your goal? (Was it something through the processing
toolbox? Or the main functions in QGIS?)

These errors kind of look like what I've seen when I use SAGA GIS through
the processing toolbox and operations fail - I often find some SAGA
functions work best when I use SAGA as a stand-alone tool.  It should be
installed with QGIS (on Windows you should be able to find it by searching
in your start menu... not sure offhand about mac/linux systems).
Alternatively, you could download (a newer version of) SAGA and install
that on its own as well: http://www.saga-gis.org/en/index.html

Again though, giving more details will help others give some advice.
Cheers,
Mike

On Wed, Feb 17, 2016 at 9:42 AM, Ashish Guruji <
ashish.guruji-poly...@msubaroda.ac.in> wrote:

> SYSTEM:32 BIT
> VERSON QGIS:2.6.1
> INSTALLED:JANUARY 2016
> ​MESSAGE CAME IN QGIS​
>
> Oooops! The following output layers could not be open
>
> · Pit Removed Elevation Grid: 
> D:/ashishgurujipolytechnic-20-6-14/ashishgurujipolytechnic-29-8-15/RESEARCH
> WORK/MSU RESEARCH CELL/BHUVAN DATA/cdnf43t/pit_rmv.tif
>
> The above files could not be opened, which probably indicates that they
> were not correctly produced by the executed algorithm
>
> Checking the log information might help you see why those layers were not
> created as expected
>
>
>
>
>
> Oooops! The following output layers could not be open
>
> · D8 Flow Direction Grid: 
> D:/ashishgurujipolytechnic-20-6-14/ashishgurujipolytechnic-29-8-15/RESEARCH
> WORK/MSU RESEARCH CELL/BHUVAN DATA/cdnf43t/flow_drc.tif
>
> · D8 Slope Grid: 
> D:/ashishgurujipolytechnic-20-6-14/ashishgurujipolytechnic-29-8-15/RESEARCH
> WORK/MSU RESEARCH CELL/BHUVAN DATA/cdnf43t/flow_grid.tif
>
> The above files could not be opened, which probably indicates that they
> were not correctly produced by the executed algorithm
>
> Checking the log information might help you see why those layers were not
> created as expected
>
>
> IS THIS DUE TO LONG PATH OF FILE?
>
> --
> Ashish Laxman Guruji
> Lecturer & Internal Co-ordinator
> Civil & CDTP(Community Development Through Polytechnic)
> Polytechnic
> The M.S.University of Baroda
> Near Shashtri Bridge
> Fateh gunj
> Vadodara-390002
> Ph:91-9904222832
>
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Re: [Qgis-user] Problem w/ Processing Plugin in Mac

[Michael Treglia]

Thanks Alexander,

That worked!

(It was actually the first thing I was going to try, but definitely wanted
to see if there was anything else obvious...)
Cheers,
mike

On Wed, Feb 3, 2016 at 1:17 PM, Alexander Bruy <alexander.b...@gmail.com>
wrote:

> Hi Michael,
>
> try to remove Processing plugin from your user directory,
> e.g. /Users/evan/.qgis2/python/plugins/processing
>
> 2016-02-03 21:02 GMT+02:00 Michael Treglia <mtreg...@gmail.com>:
> > Hi All,
> >
> > I have a student trying to work with QGIS on a Mac and is having trouble
> > starting the Processing Plugin; I'm primarily Windows & Ubuntu user and
> > thought some Mac users on the list might have some trouble-shooting tips
> I
> > can recommend. (It might be something simple - I just haven't encountered
> > this issue before, and a lot of the options I see on StackExchange are
> > homebrew focused).
> >
> > The student is on a fairly recent version of OS 10, and said he installed
> > QGIS via the downloads (w/ dependencies) available from KyngChaos.
> >
> > The student first started with 2.12.1-1, and when trying to make sure the
> > processing plugin was activated/installed, got this error:
> > Couldn't load plugin 'processing'
> > ImportError: cannot import name spatialite_utils
> >
> > I can send the entire traceback if needed, but this is where it seems to
> > have gotten hung up:
> >
> >   File "/Users/evan/.qgis2/python/plugins/processing/tools/vector.py",
> line
> > 20, in
> >
> > from processing.algs.qgis import spatialite_utils
> >
> > ImportError: cannot import name spatialite_utils
> >
> > They then tried QGIS 2.8.4-1 (also from KyngChaos), with Processing
> throwing
> > the result given at the end of this e-mail. I will be meeting with the
> > student later today to try a couple of things, but any suggestions of
> what
> > might be going on or how to deal with this are welcome. I think for the
> > 2.8.4, might just need to remove the .qgis folder and start over, but it
> > would be great to solve the issue in 2.12 also.
> >
> > Thanks!
> > Mike
> >
> >
> >
> >
> > Couldn't load plugin 'processing' from
> >
> ['/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins/processing',
> > '/Applications/QGIS.app/Contents/MacOS/../Resources/python',
> > '/Users/evan/.qgis2/python', '/Users/evan/.qgis2/python/plugins',
> > '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins',
> > '/Library/Frameworks/SQLite3.framework/Versions/C/Python/2.7',
> > '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7/site-packages',
> > '/Library/Python/2.7/site-packages/numpy-override',
> > '/Library/Python/2.7/site-packages/matplotlib-override',
> >
> '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
> > '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
> >
> '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC',
> > '/Library/Python/2.7/site-packages', '/Users/evan/.qgis2//python',
> > '/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools']
> > Traceback (most recent call last):
> >   File
> >
> "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py",
> > line 196, in loadPlugin
> > __import__(packageName)
> >   File
> >
> "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py",
> > line 478, in _import
> > mod = _builtin_import(name, globals, locals, fromlist, level)
> >   File "/Users/evan/.qgis2/python/plugins/processing/__init__.py", line
> 29,
> > in
> > from processing.tools.general import *
> >   File
> >
> "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qg

[Qgis-user] Problem w/ Processing Plugin in Mac

[Michael Treglia]

Hi All,

I have a student trying to work with QGIS on a Mac and is having trouble
starting the Processing Plugin; I'm primarily Windows & Ubuntu user and
thought some Mac users on the list might have some trouble-shooting tips I
can recommend. (It might be something simple - I just haven't encountered
this issue before, and a lot of the options I see on StackExchange are
homebrew focused).

The student is on a fairly recent version of OS 10, and said he installed
QGIS via the downloads (w/ dependencies) available from KyngChaos.

The student first started with 2.12.1-1, and when trying to make sure the
processing plugin was activated/installed, got this error:
Couldn't load plugin 'processing'
ImportError: cannot import name spatialite_utils

I can send the entire traceback if needed, but this is where it seems to
have gotten hung up:

  File "/Users/evan/.qgis2/python/plugins/processing/tools/vector.py",
line 20, in

from processing.algs.qgis import spatialite_utils

ImportError: cannot import name spatialite_utils

They then tried QGIS 2.8.4-1 (also from KyngChaos), with Processing
throwing the result given at the end of this e-mail. I will be meeting with
the student later today to try a couple of things, but any suggestions of
what might be going on or how to deal with this are welcome. I think for
the 2.8.4, might just need to remove the .qgis folder and start over, but
it would be great to solve the issue in 2.12 also.

Thanks!
Mike




Couldn't load plugin 'processing' from
['/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins/processing',
'/Applications/QGIS.app/Contents/MacOS/../Resources/python',
'/Users/evan/.qgis2/python', '/Users/evan/.qgis2/python/plugins',
'/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins',
'/Library/Frameworks/SQLite3.framework/Versions/C/Python/2.7',
'/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7/site-packages',
'/Library/Python/2.7/site-packages/numpy-override',
'/Library/Python/2.7/site-packages/matplotlib-override',
'/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages',
'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old',
'/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload',
'/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC',
'/Library/Python/2.7/site-packages', '/Users/evan/.qgis2//python',
'/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools']
Traceback (most recent call last):
  File
"/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py",
line 196, in loadPlugin
__import__(packageName)
  File
"/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py",
line 478, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
  File "/Users/evan/.qgis2/python/plugins/processing/__init__.py", line 29,
in
from processing.tools.general import *
  File
"/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py",
line 478, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
  File "/Users/evan/.qgis2/python/plugins/processing/tools/general.py",
line 28, in
from processing.core.Processing import Processing
  File
"/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py",
line 478, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
  File
"/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins/processing/core/Processing.py",
line 41, in
from processing.gui.AlgorithmClassification import AlgorithmDecorator
ImportError: cannot import name AlgorithmDecorator

Python version:
2.7.10 (default, Oct 23 2015, 18:05:06)
[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)]


QGIS version:
2.8.4-Wien Wien, exported

Python path:
['/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins/processing',
'/Applications/QGIS.app/Contents/MacOS/../Resources/python',
u'/Users/evan/.qgis2/python', u'/Users/evan/.qgis2/python/plugins',
'/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins',
'/Library/Frameworks/SQLite3.framework/Versions/C/Python/2.7',
'/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7/site-packages',
'/Library/Python/2.7/site-packages/numpy-override',
'/Library/Python/2.7/site-packages/matplotlib-override',

Re: [Qgis-user] desktop icons on fresh windows

[Michael Treglia]

Hi Richard,

I think that's a good suggestion, as I've had the exact same experience
with new users (and it creates some desktop clutter).

As a regular QGIS user, I actually tend to remove the icons other than qgis
desktop and open up anything else I need via start menu or command line.


Thanks!
Cheers,
mike

On Fri, Jan 22, 2016 at 4:07 PM, Richard Duivenvoorde 
wrote:

> Hi Users,
>
> I've installed QGIS for other beginning QGIS users recently.
>
> And almost 8 out of 10 are overwhelmed with the number of icons that are
> place on their desktop, and do not know which one to 'start'.
>
> What about with a fresh windows install ONLY place th QGIS-Desktop
> window on your desktop, all other stuff (designer, browser, cli etc etc)
> are already available.
>
> Does this sound as a good idea? Please let me/us know...
>
> Second step is to find out how to do this :-)
>
> Regards,
>
> Richard
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Re: [Qgis-user] Best way to work in QGIS as 'clean install'

[Michael Treglia]

Ah, these suggestions are super useful! Thanks!

Cheers,
Mike

On Mon, Jan 11, 2016 at 1:59 PM, Richard Duivenvoorde <rdmaili...@duif.net>
wrote:

>
> Yep, I would go for the command line args too:
>
> if you find the bat file which starts qgis and change it to add the
> command line args, you start with a qgis which puts all normal settings
> and options in a (temp) directory you point to:
>
> about class room setups:
>
> http://www.qgis.nl/2014/04/22/qgis-in-de-klas-onder-windows/?lang=en
> and
> http://planet.qgis.org/planet/user/26/
>
> Regards,
>
> Richard
>
> On 11-01-16 20:41, Nathan Woodrow wrote:
> > Hi,
> >
> > There is command line args you can use. --optionspath and --settingspath
> > which will let you set a folder to write and Save settings to.  This is
> > what I use when I want a clean QGIS start each time.
> >
> > Regards,
> > Nathan
> >
> > On Tue, 12 Jan 2016 5:25 am Michael Treglia <mtreg...@gmail.com
> > <mailto:mtreg...@gmail.com>> wrote:
> >
> > Thanks Alex,
> >
> > Good point about Clones of the VM - I hadn't thought about that, and
> > didn't realize it only stores the differences against the original -
> > that sounds really useful more broadly too.
> >
> > Thanks!
> > mike.
> >
> >
> >
> > On Mon, Jan 11, 2016 at 1:17 PM, Alex M <tech_...@wildintellect.com
> > <mailto:tech_...@wildintellect.com>> wrote:
> >
> > On 01/11/2016 10:59 AM, Michael Treglia wrote:
> > > Hi Everybody,
> > >
> > > I'm updating some training material I use in a course, and
> > want to make
> > > sure I'm viewing things as new users with a clean install
> > would (while
> > > maintaining a copy with everything as I want it configured).
> > I've figured
> > > out a way to do this, but wanted to see if others have a
> > better solution.
> > >
> > > My method that works just fine (and lets me do screenshots and
> > such) is to
> > > work on QGIS within a Ubuntu virtual machine, from my host
> > Windows pc.
> > >
> > > It seems like a slightly easier way would be to have a
> > separate install of
> > > QGIS on Windows - tried that using two different install
> > methods on the
> > > same user account (OSGeo4W vs Standalone installer), but the
> > standalone
> > > picked up the settings from my OSGeo install.  To work as
> > desired, would
> > > that have to be done on a separate user account?
> > >
> > > Thanks for your thoughts - Cheers,
> > > mike
> > >
> > >
> >
> > +1 Virtual Machine
> > It's the only real way to ensure it's 100% separate. You can
> > also make
> > cheap clones of the VM (only stores the differences), so that
> > you always
> > have a clean base VM to roll back to.
> >
> > I suppose you could login to a different windows account and
> > that would
> > at least not look at your users customization. But I'm not sure
> > if all
> > other settings would be unique.
> >
> > Thanks,
> > Alex
> >
> >
> > ___
> > Qgis-user mailing list
> > Qgis-user@lists.osgeo.org <mailto:Qgis-user@lists.osgeo.org>
> > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
> >
> >
> > ___
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> > Qgis-user@lists.osgeo.org
> > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
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> >
>
>
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[Qgis-user] Best way to work in QGIS as 'clean install'

[Michael Treglia]

Hi Everybody,

I'm updating some training material I use in a course, and want to make
sure I'm viewing things as new users with a clean install would (while
maintaining a copy with everything as I want it configured).  I've figured
out a way to do this, but wanted to see if others have a better solution.

My method that works just fine (and lets me do screenshots and such) is to
work on QGIS within a Ubuntu virtual machine, from my host Windows pc.

It seems like a slightly easier way would be to have a separate install of
QGIS on Windows - tried that using two different install methods on the
same user account (OSGeo4W vs Standalone installer), but the standalone
picked up the settings from my OSGeo install.  To work as desired, would
that have to be done on a separate user account?

Thanks for your thoughts - Cheers,
mike
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Re: [Qgis-user] Best way to work in QGIS as 'clean install'

[Michael Treglia]

Thanks Alex,

Good point about Clones of the VM - I hadn't thought about that, and didn't
realize it only stores the differences against the original - that sounds
really useful more broadly too.

Thanks!
mike.



On Mon, Jan 11, 2016 at 1:17 PM, Alex M <tech_...@wildintellect.com> wrote:

> On 01/11/2016 10:59 AM, Michael Treglia wrote:
> > Hi Everybody,
> >
> > I'm updating some training material I use in a course, and want to make
> > sure I'm viewing things as new users with a clean install would (while
> > maintaining a copy with everything as I want it configured).  I've
> figured
> > out a way to do this, but wanted to see if others have a better solution.
> >
> > My method that works just fine (and lets me do screenshots and such) is
> to
> > work on QGIS within a Ubuntu virtual machine, from my host Windows pc.
> >
> > It seems like a slightly easier way would be to have a separate install
> of
> > QGIS on Windows - tried that using two different install methods on the
> > same user account (OSGeo4W vs Standalone installer), but the standalone
> > picked up the settings from my OSGeo install.  To work as desired, would
> > that have to be done on a separate user account?
> >
> > Thanks for your thoughts - Cheers,
> > mike
> >
> >
>
> +1 Virtual Machine
> It's the only real way to ensure it's 100% separate. You can also make
> cheap clones of the VM (only stores the differences), so that you always
> have a clean base VM to roll back to.
>
> I suppose you could login to a different windows account and that would
> at least not look at your users customization. But I'm not sure if all
> other settings would be unique.
>
> Thanks,
> Alex
>
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Re: [Qgis-user] Extracting Raster values (time series) using polygons

[Michael Treglia]

Hi Sam,

Important point of clarification: Do you want all of the individual pixel
values? Or aggregate statistics, like min/max/mean/med...?

For the latter, there are a few tools you can use. I typically use a tool
in the Processing Toolbox, implemented in SAGA: Go to Processing Toolbox -
> SAGA -> Shape-Grid -> Grid Statistics and you'll be able to get those
stats for your desired grids. The only downside, if i recall correctly, is
that the column names don't necessarily indicate which layer the stats are
from, if you're operating on multiple rasters at a time.  There's a  'Zonal
Statistics'  tool also, which I think works well too. It is a plugin - it
is a 'core plugin', which means it come with QGIS,though you might need to
activate it (can't remember). If it is already activated, you'll see it
when you go to the 'Raster' toolbar menu.  If you don't see it there, you
can search for it in the 'Plugin' dialogue and make sure the box next to it
is checked.

(more details on plugins here:
https://docs.qgis.org/2.8/en/docs/user_manual/plugins/plugins.html)

If you want the former, that might be a bit more complicated, and is
something I typically do directly in R, but could give advice here too.

hope that helps!
mike

On Mon, Oct 5, 2015 at 1:39 PM, Sam Almond  wrote:

> Dear QGIS Users,
>
>
>
> I am new to using qGIS and can’t find an obvious solution to my problem.
>
>
>
> I have created a time series of NDVI rasters covering my area of interest.
> The NDVI time series is derived from the Landsat imagery spanning a decade
> of so. I also have a created a vector layer, consisting of polygons, which
> represents digitized farmed fields (70 or so). The plan is to use the
> polygons to extract the raster values from the time series, ideally one
> year at a time. The ideal scenario is to be provided with the pixel values
> per field (polygon) per NDVI over the year. Is this possible? Help
> appreciated.
>
>
> Many thanks
>
>
> Sam
>
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[Qgis-user] Issues with Global Soil Data netCDFs in QGIS GDAL

[Michael Treglia]

Hi All,

I'm trying to work with the Global Soil Dataset for Earth System Modeling
(available at: http://globalchange.bnu.edu.cn/research/soilw) and having
mixed success with the netCDF files - wanted to get any thoughts from folks
here as I'm pretty new to working with this format, and running into some
issues.

I'm primarily working with the 8-layer files (which are split into two
4-band files each; each band represents a different horizon). I'm able to
load netCDFs of some layers (in particular 'gypsum', 'CaCO3', and 'Total
Carbon') without issue (using QGIS 2.8 - both import raster and via the
netCDF viewer plugin). And running gdalinfo from the command line returns
the metadata without issue.

However, I've also been trying to work with Sand, Silt, Clay, and Gravel
Content (as % by weight), and not having any success in QGIS - the netCDF
files aren't recognized by the netCDF viewer, and can't be pulled in via
'import raster'. Also,  gdalinfo returns the following error:

ERROR 4: `SAND1.nc' not recognised as a supported file format.

I am able to read these data using R - most simply, using the 'raster'
package (sample code below), and I can also get the info using ncdf and
ncdf4 packages:
library(raster)
brk - brick([file name.nc], varname=[variablename])
#Can plot using
plot(brk) #plots all 4 layers from netcdf
plot(brk[[1]]) #Plots only first layer from netcdf

But, I'm trying to do this in QGIS or via gdal utilities for speed  - R is
slow for this (may be ways to speed it up, but haven't toyed with it much).

I'd appreciate any ideas on what might be contributing to these issues -
thanks in advance for any input!

Mike
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Re: [Qgis-user] Issues with Global Soil Data netCDFs in QGIS GDAL

[Michael Treglia]

Quick follow-up - Just tried importing one of these problematic layers into
stand-alone SAGA (version 2.1.3, x64), which worked. (Only problem was the
projection was flipped upside-down) - interesting as it was via the 'GDAL:
Import NetCDF' tool.

And the gdal version I was using (from previous e-mail) is GDAL 1.11.2

Any thoughts on this are appreciated - thanks again!
mike

On Fri, Jun 19, 2015 at 11:02 AM, Michael Treglia mtreg...@gmail.com
wrote:

 Hi All,

 I'm trying to work with the Global Soil Dataset for Earth System Modeling
 (available at: http://globalchange.bnu.edu.cn/research/soilw) and having
 mixed success with the netCDF files - wanted to get any thoughts from folks
 here as I'm pretty new to working with this format, and running into some
 issues.

 I'm primarily working with the 8-layer files (which are split into two
 4-band files each; each band represents a different horizon). I'm able to
 load netCDFs of some layers (in particular 'gypsum', 'CaCO3', and 'Total
 Carbon') without issue (using QGIS 2.8 - both import raster and via the
 netCDF viewer plugin). And running gdalinfo from the command line returns
 the metadata without issue.

 However, I've also been trying to work with Sand, Silt, Clay, and Gravel
 Content (as % by weight), and not having any success in QGIS - the netCDF
 files aren't recognized by the netCDF viewer, and can't be pulled in via
 'import raster'. Also,  gdalinfo returns the following error:

 ERROR 4: `SAND1.nc' not recognised as a supported file format.

 I am able to read these data using R - most simply, using the 'raster'
 package (sample code below), and I can also get the info using ncdf and
 ncdf4 packages:
 library(raster)
 brk - brick([file name.nc], varname=[variablename])
 #Can plot using
 plot(brk) #plots all 4 layers from netcdf
 plot(brk[[1]]) #Plots only first layer from netcdf

 But, I'm trying to do this in QGIS or via gdal utilities for speed  - R is
 slow for this (may be ways to speed it up, but haven't toyed with it much).

 I'd appreciate any ideas on what might be contributing to these issues -
 thanks in advance for any input!

 Mike

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Re: [Qgis-user] Why does clipping a raster alters cell size? (Luciano La Sala)

[Michael Treglia]

Hi Luciano,

the file that can be opened in notepad is probably has a header of
something like:
ncols
nrows
xllcorner
yllcorner
cellsize
NODATA_value

Followed by the values from your raster next, right?

If so, that is the .asc file that you want - when I export the .asc file
(running QGIS 2.8.1 x64 on Win 7), it exports these files correctly, with
the appropriate extension. (Though in the file Explorer, if you are viewing
the

On Windows [not sure about other OSs], the file extension (.asc) is not
shown by default, for files that Windows knows how to open.  To change
this, you would go to Control Panel - [view by icons] -Folder Options -
View Tab, and un-check the box next to 'Hide extensions for known file
types'.  Also, if when you are looking at the available files in Windows
Explorer, if you change to the detail view (which has file size, date
modified, etc.), there should be a field Type, for which this file should
be specified as a ASC file

Hope this helps and works for you.

Best
mike


On Wed, May 20, 2015 at 10:21 AM, Luciano La Sala 
lucianolas...@yahoo.com.ar wrote:

 Thank you very much Nicolas for your response. I have no idea how to use
 use the -tr xres yres switch in gdalwarp.
 However, I solved the problem using GDAL's algorithm Clip raster by mask
 layer and by seting the option Keep resolution of output raster to
 Yes. That produced a .tif file with equal pixel size (200, -200).

 Following, I convert this GeoTIFF to .ASC format using: Raster 
 Conversion  Translate (Convert format) and the setting the Output file to
 [GDAL] Arc/Info ASCII Grid (*.asc *.ASC).

 The result is three files: the auxiliary file .aux, the coordinate system
 file .prj, and one more filename of File type FILE that can be opened with
 Notepad. Disappointingly, no .asc file was created. What am I doing wrong?
 I need .asc files of my environmental variables to be later processed using
 other software.

 Thanks!



 El 5/20/2015 a las 6:02 AM, qgis-user-requ...@lists.osgeo.org escribió:

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 When replying, please edit your Subject line so it is more specific
 than Re: Contents of Qgis-user digest...


 Today's Topics:

 1. Re: Error installing QGIS 2.8.2-1 on Mac (Jacopo Tonetti)
 2. Draw square or line and see meters (elmalle)
 3. Re: Error installing QGIS 2.8.2-1 on Mac (Jes?s)
 4. Re: Error installing QGIS 2.8.2-1 on Mac (William Kyngesburye)
 5. Why does clipping a raster alters cell size? (Luciano La Sala)
 6. Re: Why does clipping a raster alters cell size? (Nicolas Cadieux)
 7. How I create web gis through Qgis (Debajyoti Ghosh)
 8. Re: new issue with raster calculator (Bernd Vogelgesang)
 9. Re: How I create web gis through Qgis (McDonaldR)


 --

 Message: 1
 Date: Tue, 19 May 2015 22:23:33 +0200
 From: Jacopo Tonetti jacopotone...@gmail.com
 To: Jes?s jesusl.te...@gmail.com
 Cc: qgis-user@lists.osgeo.org
 Subject: Re: [Qgis-user] Error installing QGIS 2.8.2-1 on Mac
 Message-ID:
 
 cajnh74mjhzhajenxj6pmq_uqf_n04p5onmzong8ujmwyrea...@mail.gmail.com
 Content-Type: text/plain; charset=iso-8859-1

 Hi, seems that you have an older version of PROJ library. Did you download
 the package or install via homebrew? I recommend the latter (but you
 should
 use command line), I followed this
 
 https://github.com/OSGeo/homebrew-osgeo4mac/wiki/Developing-on-QGIS-using-OSGeo4Mac
 
 guide and everything is fine, same OS and version of QGIS.
 j

 2015-05-19 19:38 GMT+02:00 Jes?s jesusl.te...@gmail.com:

  Trying to install 2.8.2-1 on a Mac (10.9.5) I find this error:

 Dyld Error Message:
Library not loaded: /Library/Frameworks/PROJ.framework/Versions/4/PROJ
Referenced from: /Applications/QGIS.app/Contents/MacOS/QGIS
Reason: Incompatible library version: QGIS requires version 10.0.0 or
 later, but PROJ provides version 8.0.0

 Binary Images:
  0x7fff6810f000 - 0x7fff68142817  dyld (239.4)
 7AD43B9B-5CEA-3C7E-9836-A06909F9CA56 /usr/lib/dyld
  0x7fff8bc7f000 - 0x7fff8bc7  com.apple.ApplicationServices
 (48
 -
 48) 3E3F01A8-314D-378F-835E-9CC4F8820031


 /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Applicat
 ionServices
  0x7fff8bc9f000 - 0x7fff8bd0bfff  com.apple.framework.IOKit
 (2.0.1 -
 907.100.14) 10932113-9F7E-38A0-A158-A019A555CAC3
 /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
  0x7fff8dd59000 - 0x7fff8df3efff  com.apple.CoreFoundation (6.9 -
 855.17) 729BD6DA-1F63-3E72-A148-26F21EBF52BB


 

Re: [Qgis-user] Why does clipping a raster alters cell size? (Luciano La Sala)

[Michael Treglia]

Hi Luciano,
glad it worked now - the latest version is 2.8.2 ('Wien')
http://www.qgis.org/en/site/forusers/download.html
best,
mike

On Wed, May 20, 2015 at 12:11 PM, Luciano La Sala 
lucianolas...@yahoo.com.ar wrote:

 Hola Mike,

 Thanks! Adding the extension myself did work! The has to be something
 wrong either with my OS or my version of QGIS. By the way, I am using the
 latest version of QGIS (2.2.0 Valmiera).

 Best,

 Luciano

 El 5/20/2015 a las 1:47 PM, Michael Treglia escribió:

 Hi Luciano,

 I'm bringing this back to the list so others can chime in and follow
 this thread in the future.

 Strange that the file isn't writing out with the .asc extension (it does
 for me) - what version of QGIS are you using?

 A very simple solution: simply rename the file to add the '.asc'
 extension. (Right click on the file name in Windows Explorer, select
 'Rename', and at the end of the filename simply add '.asc') - again ,
 this should be with the Windows setting to have file extensions visible.

 Hope that helps
 mike


 On Wed, May 20, 2015 at 11:30 AM, Luciano La Sala
 lucianolas...@yahoo.com.ar mailto:lucianolas...@yahoo.com.ar wrote:

 Hi Mike,

 Many thanks for the response. Your assumption about the content of
 my file is correct. This seems to be the .asc file that I need. I
 did follow your instructions and unchecked the box next to Hide
 extensions for known file types. Now, two of the three files show
 their extension, namely .aux.xml and .prj. However, the suspected
 .asc file still shows no extension. Also, when I look at the file in
 Windows Explorer, under the detail view, there is no extension for
 the file! Finally, when right-click on the file, go to Properties
 and then under General  Type of file: FILE, and under Details 
 Type: File. No extension whatsoever!

 I did a quick search on the web and I found that the FILE file type
 is primarily associated with 'File With No Extension'. If you are
 seeing the file type FILE this is not a file extension but an
 indicator in Windows Explorer that the file has not file extension.
 Incorrect file associations could be the result of underlying issues
 within the PC system.

 This is very frustrating since I need those .asc files to model my
 species distribution models using maxent.

 Ideas?

 Best,

 Luciano


 El 5/20/2015 a las 12:50 PM, Michael Treglia escribió:

 Hi Luciano,

 the file that can be opened in notepad is probably has a header of
 something like:
 ncols
 nrows
 xllcorner
 yllcorner
 cellsize
 NODATA_value

 Followed by the values from your raster next, right?

 If so, that is the .asc file that you want - when I export the
 .asc file
 (running QGIS 2.8.1 x64 on Win 7), it exports these files
 correctly,
 with the appropriate extension. (Though in the file Explorer, if
 you are
 viewing the

 On Windows [not sure about other OSs], the file extension (.asc)
 is not
 shown by default, for files that Windows knows how to open.  To
 change
 this, you would go to Control Panel - [view by icons] -Folder
 Options
 - View Tab, and un-check the box next to 'Hide extensions for
 known
 file types'.  Also, if when you are looking at the available
 files in
 Windows Explorer, if you change to the detail view (which has
 file size,
 date modified, etc.), there should be a field Type, for which
 this
 file should be specified as a ASC file

 Hope this helps and works for you.

 Best
 mike


 On Wed, May 20, 2015 at 10:21 AM, Luciano La Sala
 lucianolas...@yahoo.com.ar mailto:lucianolas...@yahoo.com.ar
 mailto:lucianolas...@yahoo.com.ar

 mailto:lucianolas...@yahoo.com.ar wrote:

  Thank you very much Nicolas for your response. I have no
 idea how to
  use use the -tr xres yres switch in gdalwarp.
  However, I solved the problem using GDAL's algorithm Clip
 raster by
  mask layer and by seting the option Keep resolution of
 output
  raster to Yes. That produced a .tif file with equal
 pixel size
  (200, -200).

  Following, I convert this GeoTIFF to .ASC format using:
 Raster 
  Conversion  Translate (Convert format) and the setting
 the Output
  file to [GDAL] Arc/Info ASCII Grid (*.asc *.ASC).

  The result is three files: the auxiliary file .aux, the
 coordinate
  system file .prj, and one more filename of File type FILE
 that can
  be opened with Notepad. Disappointingly, no .asc file was
 created.
  What am I doing wrong? I need .asc files of my

Re: [Qgis-user] Why does clipping a raster alters cell size? (Luciano La Sala)

[Michael Treglia]

Hi Luciano,

I'm bringing this back to the list so others can chime in and follow this
thread in the future.

Strange that the file isn't writing out with the .asc extension (it does
for me) - what version of QGIS are you using?

A very simple solution: simply rename the file to add the '.asc' extension.
(Right click on the file name in Windows Explorer, select 'Rename', and at
the end of the filename simply add '.asc') - again , this should be with
the Windows setting to have file extensions visible.

Hope that helps
mike


On Wed, May 20, 2015 at 11:30 AM, Luciano La Sala 
lucianolas...@yahoo.com.ar wrote:

 Hi Mike,

 Many thanks for the response. Your assumption about the content of my file
 is correct. This seems to be the .asc file that I need. I did follow your
 instructions and unchecked the box next to Hide extensions for known file
 types. Now, two of the three files show their extension, namely .aux.xml
 and .prj. However, the suspected .asc file still shows no extension. Also,
 when I look at the file in
 Windows Explorer, under the detail view, there is no extension for the
 file! Finally, when right-click on the file, go to Properties and then
 under General  Type of file: FILE, and under Details  Type: File. No
 extension whatsoever!

 I did a quick search on the web and I found that the FILE file type is
 primarily associated with 'File With No Extension'. If you are seeing the
 file type FILE this is not a file extension but an indicator in Windows
 Explorer that the file has not file extension. Incorrect file associations
 could be the result of underlying issues within the PC system.

 This is very frustrating since I need those .asc files to model my species
 distribution models using maxent.

 Ideas?

 Best,

 Luciano


 El 5/20/2015 a las 12:50 PM, Michael Treglia escribió:

 Hi Luciano,

 the file that can be opened in notepad is probably has a header of
 something like:
 ncols
 nrows
 xllcorner
 yllcorner
 cellsize
 NODATA_value

 Followed by the values from your raster next, right?

 If so, that is the .asc file that you want - when I export the .asc file
 (running QGIS 2.8.1 x64 on Win 7), it exports these files correctly,
 with the appropriate extension. (Though in the file Explorer, if you are
 viewing the

 On Windows [not sure about other OSs], the file extension (.asc) is not
 shown by default, for files that Windows knows how to open.  To change
 this, you would go to Control Panel - [view by icons] -Folder Options
 - View Tab, and un-check the box next to 'Hide extensions for known
 file types'.  Also, if when you are looking at the available files in
 Windows Explorer, if you change to the detail view (which has file size,
 date modified, etc.), there should be a field Type, for which this
 file should be specified as a ASC file

 Hope this helps and works for you.

 Best
 mike


 On Wed, May 20, 2015 at 10:21 AM, Luciano La Sala
 lucianolas...@yahoo.com.ar mailto:lucianolas...@yahoo.com.ar wrote:

 Thank you very much Nicolas for your response. I have no idea how to
 use use the -tr xres yres switch in gdalwarp.
 However, I solved the problem using GDAL's algorithm Clip raster by
 mask layer and by seting the option Keep resolution of output
 raster to Yes. That produced a .tif file with equal pixel size
 (200, -200).

 Following, I convert this GeoTIFF to .ASC format using: Raster 
 Conversion  Translate (Convert format) and the setting the Output
 file to [GDAL] Arc/Info ASCII Grid (*.asc *.ASC).

 The result is three files: the auxiliary file .aux, the coordinate
 system file .prj, and one more filename of File type FILE that can
 be opened with Notepad. Disappointingly, no .asc file was created.
 What am I doing wrong? I need .asc files of my environmental
 variables to be later processed using other software.

 Thanks!



 El 5/20/2015 a las 6:02 AM, qgis-user-requ...@lists.osgeo.org
 mailto:qgis-user-requ...@lists.osgeo.org escribió:

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Re: [Qgis-user] How to get a subset of polygons crossed by lines?

[Michael Treglia]

Hi Patrick,

I haven't had experience with using the intersect tool in QGIS, but looks
like a spatial query (with the Spatial Query Plugin) can do what you want -
see a tutorial here, starting around step 22:
http://www.qgistutorials.com/en/docs/performing_spatial_queries.html

(after you get the result, there will be a list of feature IDs that are
selected based on the query, and there will be an icon on the screen to
create a new layer with the selected features)

I just did it with a test dataset and it performed as expected.

Hope that helps
mike

On Fri, May 1, 2015 at 2:10 AM, Patrick Giraudoux 
patrick.giraud...@univ-fcomte.fr wrote:

 Hello,

 I have a question related to how the function intersect works. I have
 two shapefiles, one of lines the others of polygons. I would like to get
 into a shapefile the polygons that are intersected by the lines. I tried
 unsuccessfully using Vector  Geoprocessing tools  intersect. In this
 case, if the input is the lines and the intersect the polygon, I can split
 the lines according to the border of each polygon, and each segment is
 identified by the polygon name in the attribute, but this is not what I
 want to. If I do the  reverse, I get an empty polygon vector file.

 What I want is the shapefile of the subset of polygons that intersect the
 lines...

 Any idea about how to proceed ?

 Patrick

 PS: for info, the expected result can be easily obtained in R, package
 'rgeos', function 'gIntersection'
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Michael Treglia]

Hi Johan.

I've re-added the QGIS-User list to this, as I'm primarily on Windows. Just
upgraded to QGIS 2.8.1 no a virtual machine with ubuntu 14.04, and also
didn't get SAGA or GRASS installed immediately, and don't have time right
now to figure it out.  (I imagine others on the list can help you with the
saga/grass install issues)

As a quick work-around, you should be able to just install SAGA via the
tarball here:
http://sourceforge.net/projects/saga-gis/files/SAGA%20-%202.1/SAGA%202.1.4/
[or just sudo apt-get install saga seems to work too].  At least on
windows, you can just drag files into SAGA and work with them there, and
then work with the respective modules, so hopefully that is the same on
Ubuntu.

An alternative is working with R, using the 'extract' function in the
'raster' package (see the documentation here:
http://cran.r-project.org/web/packages/raster/index.html; and a good intro
to spatial data with R is available here:
http://science.nature.nps.gov/im/datamgmt/statistics/r/advanced/spatial.cfm)

Sorry I can't be more help - good luck.
Cheers,
Mike

On Mon, Apr 20, 2015 at 9:12 AM, Johan Nilsson joni8...@gmail.com wrote:

 Can't find Saga or Grass tools on Ubuntu 14.04 with
 http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu

 Maybe down grade to stable? For a couple of years ago unstable was stable,
 but now with Grass 7.0 and i don't know how it is with SAGA, but I can not
 find it. Maybe It is why Processing -- Zonal Statistics do not work
 because it depend on Grass 6.4 or Saga? When i run processing -- zonal
 statistics noting happens but say I shoukld check the log, but the
 log-window does not show anything.

 2015-04-20 2:23 GMT+02:00 Michael Treglia mtreg...@gmail.com:

 Also, theres a utility in SAGA, implemented within the Processing
 toolbox. See SAGA - Shapes - Grid - Grid statistics for polygons

 Lets you calculate:
 * Number of Cells
 * Minimum
 * Maximum
 * Range
 * Sum
 * Mean
 * Variance
 * Standard Deviation
 * Specified Quartiles

 Hope that helps,
 mike

 On Sun, Apr 19, 2015 at 11:54 AM, Micha Silver mi...@arava.co.il wrote:



 On 04/19/2015 12:34 PM, Johan Nilsson wrote:

  Zonal statistics work well to extract, numers of cells(counts) , sum
 of the value (sum)  and also average (mean) But I want the minimum AND
 max-value and also standard error, if possible. Is there another plugin or
 a tutorial how it may bee done in another way.

   The GRASS module v.rast.stats does what you want. But it's not in the
 Processing toolbox. You can import your raster into a GRASS mapset then do
 the analysis directly within GRASS.

  The code to Zonal statistics are here, but I'm total lost in how it
 work.


 https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp

  /Cheers

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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Michael Treglia]

Also, theres a utility in SAGA, implemented within the Processing toolbox.
See SAGA - Shapes - Grid - Grid statistics for polygons

Lets you calculate:
* Number of Cells
* Minimum
* Maximum
* Range
* Sum
* Mean
* Variance
* Standard Deviation
* Specified Quartiles

Hope that helps,
mike

On Sun, Apr 19, 2015 at 11:54 AM, Micha Silver mi...@arava.co.il wrote:



 On 04/19/2015 12:34 PM, Johan Nilsson wrote:

  Zonal statistics work well to extract, numers of cells(counts) , sum of
 the value (sum)  and also average (mean) But I want the minimum AND
 max-value and also standard error, if possible. Is there another plugin or
 a tutorial how it may bee done in another way.

   The GRASS module v.rast.stats does what you want. But it's not in the
 Processing toolbox. You can import your raster into a GRASS mapset then do
 the analysis directly within GRASS.

  The code to Zonal statistics are here, but I'm total lost in how it work.


 https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp

  /Cheers

 This mail was received via Mail-SeCure System.


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Re: [Qgis-user] Problem with raster calculator

[Michael Treglia]

Hi All,

Was encountering a similar problem with Raster Calculator [albeit a bit
different] just yesterday - I had a layer that had values ranging ~0-1000
(integers). I wanted the layer to represent probability values (ranging
0-1), so I used the raster calculator to divide it by 1000.

I ended up with 'nan' values displayed as the max and min on the Layers
pane and when I try to get into the properties I get a Bad allocation
message.   Using the 'Identify Features' tool, the values look appropriate,
but  I can't adjust the style or anything.

I ended up doing what I needed in R for now, but it would be great to work
through this issue - I'm open to any suggestions, or can send the data in
case others want to test.

Using QGIS 2.8.1 64-bit on Win7.

Cheers,
mike

On Wed, Apr 15, 2015 at 4:30 AM, Ricardo Filipe Soares Garcia da 
ricardo.garcia.si...@gmail.com wrote:

 Hi Jesus

 Perhaps your input layer has no values that match the = 73 condition?

 I can reproduce this behaviour if I use a layer in which pixel values go
 up to 50 and I ask for pixels = 60.

 Otherwise, if the input layer has values above the threshold, it seems
 strange and I cannot seem to reproduce it here (QGIS 2.8.1)




 On Wed, Apr 15, 2015 at 8:58 AM, Jesus Munoz jesusmunozserr...@gmail.com
 wrote:

 Good morning list!!

 I am trying to do a cloud mask for a Landsat image based on the values of
 the pixels where the clouds are found. I am using the raster calculator for
 this purpose by introducing the expression:

 (“Band 1 layer name = 73) * Band 1 layer name”

 So basically, I am trying to obtain a layer in which all pixels with a
 value lower than 73 are removed.

 However, after calculating this expression I only get an empty raster
 layer, only visible in the layers panel and populated only by “nan” values.
 Does anybody know what am I doing wrong???

 Jesus
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[Qgis-user] Styles for Extremely Small-Value Rasters

[Michael Treglia]

Hi All,

I had a raster output from a kernel density estimate I produced in R (using
the adehabitatHR package). I imported the layer to QGIS, and it displays by
default without any issue (Rener type: Singleband Gray).

However, when I try changing this to color (Render type: Singleband
pseudocolor), I can't get the gradient in values to display. Since it is a
Kernel Density Estimate result, the values are all extremely low, covering
a fairly large area. The range of values is 0 to 6.4773e-10. When I either
use the 'Classify' button to set value ranges to specific colors, all of
the values stay at 0.  When I enter the small values into the
classification Value field by hand, the display does not change.

Increasing the values by multiplying the layer makes it feasible and plots
okay, but I'd rather keep values to the originals/not go through an extra
step.

Anybody have success with plotting rasters with extremely small values with
different color ramps?

Any suggestions are appreciated...

Thanks,
Mike
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Re: [Qgis-user] Styles for Extremely Small-Value Rasters

[Michael Treglia]

Nicolas,

Thanks for the quick response. I might be mis-understanding your
suggestion, so let me know if that seems to be the case.

The problem isn't specifying the min/max values (Loading the Min/Max values
from the raster is not a problem). The problem is that the color ramp
doesn't seem to interpret decimals at such fine precision. Since all of the
numbers in the raster are so close to 0, even when I enter specific values
for the color ramp to use (as the 'Value' next to the individual colors),
with such small numbers they all seem to just be recognized as 0.

In case it helps , this is QGIS 2.8.1 Win64 (on Windows 7).

Thanks again!
mike



On Fri, Apr 3, 2015 at 2:13 PM, Nicolas Cadieux 
nicolas.cadi...@archeotec.ca wrote:

 Hi,
 You can manually place the min and max values. Since the screen is limited
 to 256 values, you will need to decide what values to display.  If 0 is
 null, you should indicate that in the raster properties. That will help
 with the classification.

 Nicolas Cadieux M.Sc.
 Les Entreprises Archéotec inc.
 8548, rue Saint-Denis Montréal H2P 2H2
 Téléphone: 514.381.5112  Fax: 514.381.4995
 www.archeotec.ca
 Le 2015-04-03 14:54, mtreg [via OSGeo.org] [hidden email]
 http:///user/SendEmail.jtp?type=nodenode=5199936i=0 a écrit :

 Hi All,

 I had a raster output from a kernel density estimate I produced in R
 (using the adehabitatHR package). I imported the layer to QGIS, and it
 displays by default without any issue (Rener type: Singleband Gray).

 However, when I try changing this to color (Render type: Singleband
 pseudocolor), I can't get the gradient in values to display. Since it is a
 Kernel Density Estimate result, the values are all extremely low, covering
 a fairly large area. The range of values is 0 to 6.4773e-10. When I either
 use the 'Classify' button to set value ranges to specific colors, all of
 the values stay at 0.  When I enter the small values into the
 classification Value field by hand, the display does not change.

 Increasing the values by multiplying the layer makes it feasible and plots
 okay, but I'd rather keep values to the originals/not go through an extra
 step.

 Anybody have success with plotting rasters with extremely small values
 with different color ramps?

 Any suggestions are appreciated...

 Thanks,
 Mike

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[Qgis-user] Contiguous Units Analysis in QGIS?

[Michael Treglia]

Hi All,

Was wondering if anybody knows of any plugins [or built-in features] for
doing contiguous units analysis, such as Paired Quadrat Variance, Blocked
Quadrat Variance, etc.  Any suggestions are welcome, as I haven't found
anything for this in my searches yet.

Best,
Mike
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Re: [Qgis-user] Contiguous Units Analysis in QGIS?

[Michael Treglia]

Thanks Nicolas - I've been searching around, and can't find anything quite
as 'canned' as I was hoping.

In R, I think I could use 'quadrat' functions of the spatstat package, but
as far as I can find, I'd have to write my own functions for these analyses
around those tools.

-Mike

On Mon, Feb 2, 2015 at 9:35 AM, Nicolas Cadieux 
nicolas.cadi...@archeotec.ca wrote:

 Hi,

 Not sure what those are exactly but my guess is that R has modules that
 can handle that.  You can look interactions between R and Qgis in the
 processing toolbox.

 Nicolas Cadieux M.Sc.
 Les Entreprises Archéotec inc.
 8548, rue Saint-Denis Montréal H2P 2H2
 Téléphone: 514.381.5112  Fax: 514.381.4995
 Le 2015-02-02 10:25, mtreg [via OSGeo.org] [hidden email]
 http:///user/SendEmail.jtp?type=nodenode=5185036i=0 a écrit :

 Hi All,

 Was wondering if anybody knows of any plugins [or built-in features] for
 doing contiguous units analysis, such as Paired Quadrat Variance, Blocked
 Quadrat Variance, etc.  Any suggestions are welcome, as I haven't found
 anything for this in my searches yet.

 Best,
 Mike

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Re: [Qgis-user] Mosaicking aerial images

[Michael Treglia]

Hi Andreas,

I'm Bringing this back to the list, as others here probably have some
better thoughts than I do.  Googling around, I found this tool which might
be useful (?), though I can't tell how it handles overlaps [haven't even
downloaded it...]: https://trac.osgeo.org/gdal/wiki/Correlator

Not sure about enblend (can't access the site right now)

Depending on how different the images are, you could just try mosaicing and
see what it looks like (gdal_merge takes the values of last image added for
overlaps).  If there's a way to standardize color values based on
brightness, or by RGB bands, that might help, either before or after
mosaicing. (might depend on if you're dealing with multi-band image, or
single band? - it would be fairly easy on multi-band like Landsat)

Hope that helps,
mike



On Wed, Dec 10, 2014 at 9:28 AM, Andreas Neumann a.neum...@carto.net
wrote:

  Hi Michael,

 I have 4 images with approx 30% overlap in each axis (north/east). I would
 like to mosaic the images to get a single big images covering the full area.

 I hope that the images are nicely blended into each other so I don't see
 the the seam/border of the original images - I was hoping to get something
 similar to enblend/enfuse (http://enblend.sourceforge.net). I don't
 think that enblend/enfuse keeps my georefencing - or does it?

 Andreas


 On 10.12.2014 16:10, Michael Treglia wrote:

  Hi Andreas,

 Do you mean that you want to effectively create a stack of rasters (i.e.,
 multi-band raster)? If not, we might need some more details.

  If so, the Raster Merge operation (using gdal_warp) should work - go to
 Raster - Miscellaneous - Merge, and check the box for Layer Stack (
 http://www.gdal.org/gdal_merge.html).

  You can also do that in SAGA via Import/Export - GDAL/OGR - GDAL:
 Export Raster, and add multiple grids, though this is a bit more
 constrained and I think needs to have all layers in the same Resolution.

  This is also do-able in R using the Raster package, look into brick,
 stack, and writeRaster

  hope that helps,
 Mike



 On Wed, Dec 10, 2014 at 8:00 AM, Andreas Neumann a.neum...@carto.net
 wrote:

 Hi,

 I georeferenced four overlapping aerial images - with QGIS/GDAL and the
 thin plate spline method. Now I want to mosaick/blend the overlapping
 images. Are there any good FOSSGIS tools available that support mosaicking
 with blending? Perhaps with SAGA/GRASS/OTB? Any recommendations?

 Thanks for any pointers/tutorials.

 Andreas
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Re: [Qgis-user] error_ R_home range

[Michael Treglia]

Reviving this thread... I was running into similar issues, despite having
the necessary packages installed.   Trying to provide useful info for
others who run into this.

I went into the processing History and Log to look at the R execution
console output for error messages and and ran the same code directly in R
to troubleshoot.

Seems that the message below message is the standard given when R scripts
using adehabitatHR don't run successfully.

The script you have executed needs the following packages:

   - adehabitatHR

Make sure they are installed in your R environment before trying to execute
this script.
Looks like I had a couple of issues going on. If my interpretation of what
was going on is mistaken, please feel free to correct.

1) The field name I was using for the Minimum Convex Polygon had spaces in
it; when the script runs in R, the spaces in column names get replaced with
a '.', so R doesn't find the same field name as specified in QGIS/the
original attribute table.

2) I did not have sufficient points for one of my groups, so the algorithm
couldn't actually compute an MCP for that group and thus failed to
complete. If you do a Feature Subset to remove categories without
sufficient numbers of points (in the Layer Properties), this works because
R is looking at a Temp file that excludes the specified data points.

I hope this helps others, and if I'm missing something, please let me know.

Best regards,
Mike




On Wed, Oct 29, 2014 at 8:34 AM, Sergio Vignali vignalisergi...@gmail.com
wrote:

 Hi Emiliano,
 Have you installed adehabitatHR package?

 all the best

 Sergio

 2014-10-29 14:30 GMT+01:00 Emiliano Manzo emiliano.ma...@ethoikos.it:

 Hi

 i have tried to use R home range, i have installed adhabitat on R and
 after i had tried to run h kernel but i received this error message and i
 don’t know what i can do.

 I used Mac os X Qgis 2.4

 Oooops! The following output layers could not be open

- Home_ranges:

 /var/folders/zw/bp2757r12_s4_rryzp2fjblwgn/T/processing/eb692106bf2b4c75b891f7cd3a67c6bc/Homeranges.shp

 The above files could not be opened, which probably indicates that they
 were not correctly produced by the executed algorithm

 Checking the log information might help you see why those layers were not
 created as expected

 This algorithm requires R to be run. A test to check if R is correctly
 installed and configured in your system has been performed, with the
 following result:
 R seems to be correctly installed and configured

 The script you have executed needs the following packages:

- adehabitatHR

 Make sure they are installed in your R environment before trying to
 execute this script.


 Is anybody can help me?

 Thank you

 Emiliano

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Re: [Qgis-user] 2.6.1 Cannot open .img raster file

[Michael Treglia]

Huh, Thats strange - I just loaded a .img of a DEM on 2.6.1 (x64, Win 7)
without issue.

If you want to try with the same type of file that I used, you can download
any of the .zip files here:
ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/13/IMG/

Are you able to load other raster formats without a problem?

Though I don't know if I'll be able to help, others might find it useful
for trouble-shooting to know what operating system you're on and whether
you're using 32 or 64 bit QGIS.

Cheers,
Mike



On Wed, Dec 3, 2014 at 9:21 AM, Martin Runkel dr.martin.run...@t-online.de
wrote:

 Hi,

 since I installed Rel. 2.6.1,  I cannot open .img raster files (ERDAS
 Imagine format) any more.
 When trying to do so, I get the error message ... no supported data
 source.

 Can anybody help me?

 Regards,
 Martin

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Re: [Qgis-user] Raster: replace a single value with another value

[Michael Treglia]

Andreas,

You're running 64bit SAGA, right? (if not sure, click the question mark on
the menu bar, and click About - should be towards the top).

I actually like SAGA because I can throw pretty giant files at it.  Just to
test out and make sure, I just loaded in a 10GB GeoTIFF with integer
values, and did a single value reclass that took about 3 minutes. You
likely need ample RAM and disk space, but given that you do, it should be
feasible. [Watching the system resources, you can see the respective amount
of memory get taken up as you work with data in SAGA]

The 4GB limit seems like it could be a 32 bit issue.  I was using the
latest version of SAGA (2.1.3), 64 bit, downloaded from:
http://sourceforge.net/projects/saga-gis/files/SAGA%20-%202.1/SAGA%202.1.3/

If you're really stuck and need to knock this task out of the way - if you
can get me the data I can do the reclass for you.

hope that helps,
mike

On Tue, Nov 18, 2014 at 10:04 AM, Andreas Neumann a.neum...@carto.net
wrote:

 Hi Carlos,

 I reprojected to a different swiss projection system and the expression
 still does not work. I tested various projections, including UTM-32N. Very
 strange ...

 There clearly seems to be a bug in the raster calculator. I will open a
 bug with high priority.

 Thanks for testing and helping!

 Andreas


 Am 2014-11-18 15:36, schrieb Carlos Cerdán:

 Hi Andreas:

 It is solved: you have to reproject your TEMP layer. I've tried with
 UTM-32N zone and raster calculator works fine.

 Why raster calculator (and SAGA) doesn't work with your original CRS?
 Well, I don't know, perhaps devs group have the answer.

 It was a good challenge.

 Carlos

 2014-11-18 4:37 GMT-05:00 Andreas Neumann a.neum...@carto.net:

  Hi Carlos,

 Thank you for your help!

 I tried with

 (TEMP@1=249)*255 + (TEMP@1249)*TEMP@1 + (TEMP@1249)*TEMP@1

 My layer is called temp. However, the resulting file contains all
 0.

 I tried in both QGIS 2.4 and 2.6.

 Is there something wrong with the input file? It was generated from
 a PDF with ghostscript. Here is the metadata:

 -

 GDAL provider
 GTiff
 GeoTIFF
 Datensatzbeschreibung
 //gis/gis/mapserverdata/uep/release_2014_11/temp.tif
 TIFFTAG_DATETIME=2014:11:17 09:50:08
 TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
 TIFFTAG_SOFTWARE=GPL Ghostscript 9.10
 TIFFTAG_XRESOLUTION=600
 TIFFTAG_YRESOLUTION=600
 Kanal 1
 STATISTICS_MAXIMUM=255
 STATISTICS_MEAN=247.18714741724
 STATISTICS_MINIMUM=0
 STATISTICS_STDDEV=37.198102288306
 Dimensionen
 X: 71575 Y: 70867 Kanäle: 1
 Leerwert
 *Leerwert nicht gesetzt*
 Datentyp
 Byte - Acht Bit vorzeichenlose Ganzzahl
 Pyramidenübersichten
 Räumliches Bezugssystem des Layers
 +proj=somerc +lat_0=46.952406 +lon_0=7.4395833
 +k_0=1 +x_0=60 +y_0=20 +ellps=bessel
 +towgs84=674.4,15.1,405.3,0,0,0,0 +units=m +no_defs
 Layerausdehnung (in urspünglicher Projektion des Layers)
 0.,-70867. :
 71575.,0.
 Kanal
 Kanal 1
 Kanal Nr
 1
 Keine Statistik
 Noch keine Statistik gesammelt

 

 Thanks again if you have any idea what may be wrong with my file or
 the above listed raster calc statement.

 Andreas

 Am 2014-11-17 18:38, schrieb Carlos Cerdán:

 Hi Andreas:

 I think QGIS raster calculator can make this job. Conditional
 syntax
 is a little bit... different.  The sentence that can do it is:

 (TIFF=249)*255 + (TIFF249)*TIFF + (TIFF249)*TIFF

 Where TIFF is your raster layer. The trick is: if the sentence in
 parentheses is true, it gets value 1, else zero; so we have to
 multiply by 255 to replace the 249 values. Next we have to add the
 other values.

 Good luck,

 Carlos Cerdán

 PD. Please let me know if i'm wrong with this suggestion

 2014-11-17 12:02 GMT-05:00 Andreas Neumann a.neum...@carto.net:

 Hi,

 I have a very simple task (at least I thought it is simple), but am
 not able to do it properly.

 I have a grayscale tiff value where I would like to replace the
 value of 249 with 255 - all other values should stay as they are.

 I tried with gdal nearblack, but nothing changed - I started a
 separate email-thread about that at the gdal list.

 Then I tried with the QGIS raster calculator - but it does not
 support conditional syntax.

 I tried with Processing and GRASS - but it would stop at 8% - the
 file is quite big.

 Finally I came across SAGA Reclassify with grid value. The
 dialogue is very complicated and hard to understand. After a while
 it would stop with an error message telling me that Saga may not be
 properly configured - but it says that it is properly installed.
 Quite confusing ...

 I am trying on Win7 64bit.

 If the file wouldn't be so big I would try this task in The Gimp -
 where it is very simple to replace one pixel values with another -
 using Select by color and fill with a specific color.

 Any idea how I could achieve my task with GDAL, QGIS, GRASS or
 Saga?

 Thanks,
 Andreas

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[Qgis-user] Exporting Fine-Scale Map with Open Layers Imagery

[Michael Treglia]

Hi All,

I was trying to export a fine-scale map (total extent ~75m x 75m) that had
Google Satellite layer from the OpenLayers plugin. It took a bit to render
in the map viewer and print composer, but wasn't unreasonable.

However... At that resolution, I haven't been able to export the map from
the print composer in any way (exporting to PDF, image, or Printing to
PDF). Is there a known limitation I'm missing on this front? (The map in
the Composer window just disappears while it processes, but it never seems
to finish).

I'm running QGIS 2.6 64bit on Windows 7. And for what it's worth, the
system resources aren't at their limits at all during this either.

Thanks!
Mike
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Re: [Qgis-user] Raster postGIS problema visualizar en QGIS

[Michael Treglia]

Hi Juan,

To display a PostGIS Raster in QGIS, I think you need to use the Database
Manager plugin (DB Manager). If you have it installed/activated, you
would access it from the Database tab in the menu bar at top.   (I'm on
QGIS 2.6 and 2.4, but I'd imagine its the same for 2.0).

Is that what you're using to open the PostGIS Raster? Or were you trying to
just use the normal Add PostGIS layer method?

If that's not it, try to give more details of the steps youre taking to
access the PostGIS layer in QGIS.

Hope that helps,
Mike

On Wed, Nov 12, 2014 at 3:45 PM, Juan Miguel Requena juanmimul...@gmail.com
 wrote:

 Hello Alexandre, sorry.

 I have used the postGIS command 'raster2pgsql' to import a geotiff file
 into a postgres data base.The process was successfully finished. Both
 columns 'rid' and 'rast' were successfully created but when I connect QGIS
 2.0 to the data base and load the table, the software is unable to
 recognize the data type and the geometry type, so that I can not visualize
 the file and the attribute table has not the rast column.

 Thank you in advance for your help

 Juanmi

 El 12 de noviembre de 2014, 20:51, Alexandre Neto senhor.n...@gmail.com
 escribió:

 Hello Juan,  can I ask you to write your question in English?

 Thanks,

 Alexandre Neto
 Em 12/11/2014 16:25, Juan Miguel Requena juanmimul...@gmail.com
 escreveu:

 Hola, estoy utilizando el comando raster2pgsql de postGIS para importar
 un archivo geotif a una base de datos (postgresql). Todo el proceso lo
 ejecuta correctamente. Crea los campos 'rid' y 'rast' bien. Pero al
 conectarme a la base de datos con QGIS, la tabla postgres correspondiente
 viene como 'Tipo de dato' : Nada y 'Tipo espacial' : Ninguna geometría.
 Cuando añado el archivo y visualizo la tabla de atributos solo existe el
 campo 'rid' pero no el 'rast'.

 Alguien puede echarme un mano, muchas gracias por adelantado.

 Juanmi.

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Re: [Qgis-user] Home range plugin and animove plugin

[Michael Treglia]

Hi Massimiliano,

Regarding the Home Range Plugin, on Windows it looks like you need QGIS
1.7.3, and  possibly an earlier version of R.  I haven't tried, but I would
suspect that as long as you install the old (deprecated) adehabitat package
in R, it might work with a newer version of R.

I found these details here:
http://hub.qgis.org/projects/quantum-gis/wiki/HomeRange_plugin [Scroll
down  to Installation requirements and tested platforms section.

There are tools for Home Range Analysis in the R Scripts section of the
Processing Toolbox .

Hope that helps
mike

On Thu, Nov 6, 2014 at 9:43 AM, tmass...@alice.it tmass...@alice.it wrote:


 Hello everybody,
 anybody know what I have to do install Home range plugin and animove
 plugin? What version of QGIS I need for windows 7 ?

 Thanks a lot

 Massimiliano




 Ciao a tutti,
 qualcuno saprebbe dirmi che devo fare per installare Home range plugin e
 animove plugin? Che versione di QGIS devo scaricare per windows 7 ?

 Grazie mille

 Massimiliano


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Re: [Qgis-user] Interpolation

[Michael Treglia]

Just to clarify, the goal is to to effectively map the ridges and furrows?
Or am I missing something?

If there's high resolution orthoimagery, you could try to use standard
image classification techniques to classify the ridges and furrows. They're
visible enough on Google Earth that I bet it's doable if you can get good
imagery, depending on exactly what you need... For that site you suggested,
looks like about 0.5 m from furrow to furrow, so definitely requires high
resolution - if your area is the same, that's tough and imagery might be
more expensive, but if you can get a sample to try it out with, it might be
cheaper than doing LiDAR

I like Alex's point of using Kites (or Balloons) for high res imagery.

Hope that helps
mike

On Thu, Sep 18, 2014 at 1:21 PM, Alex Mandel tech_...@wildintellect.com
wrote:

 All the rage at http://2014.FOSS4g.org - Structure From Motion.
 Basically using airphotos to build a 3d mesh model of an area with
 classic photogrammetry calculations automated. Photos need not be from
 directly overhead.

 Specifically see the talks by Stephen Mather and Aaron Racicot.

 The open source option are not quite 100% there yet (Stephen's talk on
 OpenDroneMap) but there is a $170 program PhotoScan that's an option
 (See Aaron's talk).

 Thanks,
 Alex

 PS: I use cheap cameras on Kites for sub-centimeter photography.

 On 09/18/2014 10:58 AM, Michael.Dodd wrote:
  Yes had thought about this and nearly got Leica to test out their latest
 laser scanner a couple of years ago but land owner was frightened it might
 cause some kind of damage to the area so it never happened.
 
 
  
  From: Andrew Harfoot [a...@geodata.soton.ac.uk]
  Sent: Thursday, September 18, 2014 2:46 PM
  To: qgis-user@lists.osgeo.org
  Subject: Re: [Qgis-user] Interpolation
 
  Hi Michael,
 
  Off the top of my head, but have you looked into a laser scanner mounted
 on some sort of aerial platform such as a cherry picker? Not sure whether
 the platform would be stable enough.
 
  Alternatively a low level UAV flight may provide a detailed enough DTM
 through stereo imagery analysis.
 
  Cheers,
 
  Andy
 
  On 18/09/2014 10:43, Michael.Dodd wrote:
  Any suggestions as to the best way to survey and interpolate ridge and
 furrow grassland that is not on a flat plane?
  I have tried various methods without success.
 
  The ridge and furrow area that I want to map is about 120mx120m, the
 ridge and furrow pattern is distinct with about 0.5m or difference between
 ridge ht and furrow base but the pattern has a slight curve towards one end
 and the land is not flat.  If you are not sure what ridge and furrow looks
 like then there is an example at 51.9827, -0.9135, the stripes are clearly
 visible on the google earth image.
 
  Mapping can be done with cm level dgps but does this require many tens
 of thousands of points to be recorded. Or can fewer points be recorded and
 qgis interpolation somehow be told to interpolate along the ridge and
 furrow then fill in the area between them with some sort of curve. The
 actual curve is also problematic as the ridge top tends to be flattened and
 not a smooth sine wave.  I don't have good LIDAR of the area but even that
 resolution may not be good enough.
 
  -- The Open University is incorporated by Royal Charter (RC 000391), an
 exempt charity in England  Wales and a charity registered in Scotland (SC
 038302). The Open University is authorised and regulated by the Financial
 Conduct Authority.
 
 
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  http://lists.osgeo.org/mailman/listinfo/qgis-user
 
 
 
  --
  Andy Harfoot
 
  GeoData Institute
  University of Southampton
  Southampton
  SO17 1BJ
 
  Tel:  +44 (0)23 8059 2719
  Fax:  +44 (0)23 8059 2849
 
  www.geodata.soton.ac.ukhttp://www.geodata.soton.ac.uk
 
 
 
 
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Re: [Qgis-user] Tranferring data

[Michael Treglia]

Hi Marilena,

In my experience it seems that if the source data (i.e., original
shapefiles and such) are kept in the same folder location relative to the
.qgs file, the .qgs files should open fine. If you can't do that for some
reason, I don't know what to do, but that might be useful to learn. THis
plugin may be useful, but I've never tried it:
http://giswiki.hsr.ch/QGIS_All-in-one_Project_Plugin

I would definitely suggest testing whatever you plan to do on a few
datasets to make sure it works before going through the trouble for your
whole computer.

Hope that helps,
mike


On Wed, Aug 6, 2014 at 3:25 PM, labiancamaril...@libero.it 
labiancamaril...@libero.it wrote:



 Dear All,
 I have several projects and related files stored on a PC
 I would like to ask how can I transfer all the data to a new PC without
 losing
 them? Is there any plugin?
 Thank a lot
 Marilena
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Re: [Qgis-user] R: QGIS 2.4 Basic Tutorial

[Michael Treglia]

Hi All,

Thanks for the guidance  - I'll probably write more later with some
questions about more details.

Sasa - for now I have all the data files in the GitHub repository in a .zip
file. If you go here:
https://github.com/mtreg/QGIS-Tutorial/blob/master/QGIS-Tutorial/Treglia_Sample%20Data.zip
- simply clicking view the full file should initiate a download. [or
right-click on that and select save file as or something of the like].


Those data are not directly available from the website of the institution
referenced - staff there provided me with the data to use for this
tutorial/workshop though.

Best,
Mike


On Tue, Jul 29, 2014 at 5:19 AM, Paolo Cavallini cavall...@faunalia.it
wrote:

 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1

 On 07/26/2014 07:21 PM, Michael Treglia wrote:
  HI Stefan and others,
 
  Thanks for your thoughts and feedback!  It would definitely be
  great to have a subsite on QGIS.org, dedicated to tutorials and
  such (you meant separate from the Documentation page, right? Or am
  i misunderstanding?).

 Hi Michael,
 thanks for sharing. I think the right way to go would be to:

 * convert everything in rst, the system we use for all qgis docs
 * divide it in chunks (chapters)
 * see what is a duplication of existing material, and what is new
 * try to integrate the new material into the existing one; please
 consider that it is easy to reassemble chapters in a different
 arrangement, so to obtain different products from the same basic
 material (e.g. a short manual for newbies would be made by the general
 intro and the first part of in-depth sections; a specialized manual
 on, say, forestry would be the combination of the introductions + ad
 hoc chapters, etc.).

 I think this approach has a huge potential to speed up the adoption of
 QGIS, and make life easier for many.
 I'm available for help.
 All the best.
 - --
 Paolo Cavallini - www.faunalia.eu
 QGIS  PostGIS courses: http://www.faunalia.eu/training.html
 -BEGIN PGP SIGNATURE-
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 iEYEARECAAYFAlPXZx0ACgkQ/NedwLUzIr47WQCgscKY2a750a+3wZxXLVwX14mV
 EXMAn0gJgcWORXK1BIjt738WnIAuKcfb
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Re: [Qgis-user] In QGIS 2.4 disappeared the setting of mode-identify

[Michael Treglia]

In 2.4 for me, it is in the bottom of the window/pane that pops up when I
select the identify tool, as mode
Hope that helps,
mike


On Mon, Jul 28, 2014 at 4:15 PM, Andrea Peri aperi2...@gmail.com wrote:

 Hi,

 In the qgis 2.2 in option-map tools there was the option to set
 the mode of identify (current/topdown stop first/layer selection)

 In the qgis 2.4 this setting in not available in the same place.

 Is it move to another position ?

 Thx.

 --
 -
 Andrea Peri
 . . . . . . . . .
 qwerty àèìòù
 -
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Re: [Qgis-user] In QGIS 2.4 disappeared the setting of mode-identify

[Michael Treglia]

Hmm, weird - what's your setup? I'm on QGIS 2.4, and its working fine for
me on both 64 and 32 bit installs, on Win7 x64


On Mon, Jul 28, 2014 at 4:33 PM, G. Allegri gioha...@gmail.com wrote:

 Identify is greyed until a layer isn't selected. It means the mode
 cannot be set inside the pane (because identify isn't available) if a group
 is selected instead of a layer in the TOC. If you confirm this I consider
 it a bug.

 giovanni


 2014-07-28 22:30 GMT+02:00 Michael Treglia mtreg...@gmail.com:

 In 2.4 for me, it is in the bottom of the window/pane that pops up when I
 select the identify tool, as mode
 Hope that helps,
 mike


 On Mon, Jul 28, 2014 at 4:15 PM, Andrea Peri aperi2...@gmail.com wrote:

 Hi,

 In the qgis 2.2 in option-map tools there was the option to set
 the mode of identify (current/topdown stop first/layer selection)

 In the qgis 2.4 this setting in not available in the same place.

 Is it move to another position ?

 Thx.

 --
 -
 Andrea Peri
 . . . . . . . . .
 qwerty àèìòù
 -
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Re: [Qgis-user] In QGIS 2.4 disappeared the setting of mode-identify

[Michael Treglia]

I just created a group of line- based vector layers and the Identify tool
is available.  What do you mean by the Legend? (If you mean the Identify
Results pane, I just noticed that the View menu gets grayed out.
mike


On Mon, Jul 28, 2014 at 4:42 PM, G. Allegri gioha...@gmail.com wrote:

 Have you tried to create a group and select it in the Legend? Identify is
 not avaiable. I'm on a master build right now.


 2014-07-28 22:39 GMT+02:00 Michael Treglia mtreg...@gmail.com:

 Hmm, weird - what's your setup? I'm on QGIS 2.4, and its working fine for
 me on both 64 and 32 bit installs, on Win7 x64


 On Mon, Jul 28, 2014 at 4:33 PM, G. Allegri gioha...@gmail.com wrote:

 Identify is greyed until a layer isn't selected. It means the mode
 cannot be set inside the pane (because identify isn't available) if a group
 is selected instead of a layer in the TOC. If you confirm this I consider
 it a bug.

 giovanni


 2014-07-28 22:30 GMT+02:00 Michael Treglia mtreg...@gmail.com:

 In 2.4 for me, it is in the bottom of the window/pane that pops up when
 I select the identify tool, as mode
 Hope that helps,
 mike


 On Mon, Jul 28, 2014 at 4:15 PM, Andrea Peri aperi2...@gmail.com
 wrote:

 Hi,

 In the qgis 2.2 in option-map tools there was the option to set
 the mode of identify (current/topdown stop first/layer selection)

 In the qgis 2.4 this setting in not available in the same place.

 Is it move to another position ?

 Thx.

 --
 -
 Andrea Peri
 . . . . . . . . .
 qwerty àèìòù
 -
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 http://about.me/giovanniallegri
 Twitter: https://twitter.com/_giohappy_
 blog: http://blog.spaziogis.it
 GEO+ geomatica in Italia http://bit.ly/GEOplus





 --
 Giovanni Allegri
 http://about.me/giovanniallegri
 Twitter: https://twitter.com/_giohappy_
 blog: http://blog.spaziogis.it
 GEO+ geomatica in Italia http://bit.ly/GEOplus

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Re: [Qgis-user] In QGIS 2.4 disappeared the setting of mode-identify

[Michael Treglia]

Yup - working fine for me: http://i.imgur.com/maGMi7c.png



On Mon, Jul 28, 2014 at 5:04 PM, G. Allegri gioha...@gmail.com wrote:

 Mmm, is the identify tool available if you click on the group? It's not
 for me.
 The legend is the TOC, the layer tree...
 Look at this: http://tinyurl.com/oxy3lyo


 2014-07-28 22:58 GMT+02:00 Michael Treglia mtreg...@gmail.com:

 I just created a group of line- based vector layers and the Identify tool
 is available.  What do you mean by the Legend? (If you mean the Identify
 Results pane, I just noticed that the View menu gets grayed out.
 mike


 On Mon, Jul 28, 2014 at 4:42 PM, G. Allegri gioha...@gmail.com wrote:

 Have you tried to create a group and select it in the Legend? Identify
 is not avaiable. I'm on a master build right now.


 2014-07-28 22:39 GMT+02:00 Michael Treglia mtreg...@gmail.com:

 Hmm, weird - what's your setup? I'm on QGIS 2.4, and its working fine
 for me on both 64 and 32 bit installs, on Win7 x64


 On Mon, Jul 28, 2014 at 4:33 PM, G. Allegri gioha...@gmail.com wrote:

 Identify is greyed until a layer isn't selected. It means the mode
 cannot be set inside the pane (because identify isn't available) if a 
 group
 is selected instead of a layer in the TOC. If you confirm this I consider
 it a bug.

 giovanni


 2014-07-28 22:30 GMT+02:00 Michael Treglia mtreg...@gmail.com:

 In 2.4 for me, it is in the bottom of the window/pane that pops up
 when I select the identify tool, as mode
 Hope that helps,
 mike


 On Mon, Jul 28, 2014 at 4:15 PM, Andrea Peri aperi2...@gmail.com
 wrote:

 Hi,

 In the qgis 2.2 in option-map tools there was the option to set
 the mode of identify (current/topdown stop first/layer selection)

 In the qgis 2.4 this setting in not available in the same place.

 Is it move to another position ?

 Thx.

 --
 -
 Andrea Peri
 . . . . . . . . .
 qwerty àèìòù
 -
 ___
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 --
 Giovanni Allegri
 http://about.me/giovanniallegri
 Twitter: https://twitter.com/_giohappy_
 blog: http://blog.spaziogis.it
 GEO+ geomatica in Italia http://bit.ly/GEOplus





 --
 Giovanni Allegri
 http://about.me/giovanniallegri
 Twitter: https://twitter.com/_giohappy_
 blog: http://blog.spaziogis.it
 GEO+ geomatica in Italia http://bit.ly/GEOplus





 --
 Giovanni Allegri
 http://about.me/giovanniallegri
 Twitter: https://twitter.com/_giohappy_
 blog: http://blog.spaziogis.it
 GEO+ geomatica in Italia http://bit.ly/GEOplus

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Re: [Qgis-user] R: QGIS 2.4 Basic Tutorial

[Michael Treglia]

HI Stefan and others,

Thanks for your thoughts and feedback!  It would definitely be great to
have a subsite on QGIS.org, dedicated to tutorials and such (you meant
separate from the Documentation page, right? Or am i misunderstanding?).

I'm sure there's a lot of duplicate work going on to develop materials for
courses/trainings around the world, so it would be great to work on this in
a collaborative context, where we might make datasets available, relevant
to specific fields of study and regions.

I'm new to working on collaborative projects like this [though I've
gratefully used products of them for years now...], and would definitely
like to contribute work I've done to the larger community. For now is the
best thing to make the materials available as I have, and let folks know
about them so they can be linked appropriately by administrators? Or is it
best to work on existing training materials through GitHub?  [Sorry if this
is a really basic question - I didn't really find any answers on the
QGIS.org Get Involved page, and am not sure where to get such
information].

Also, Stefan - those materials you've posted look great! The All-in-one
Project Plugin looks like it will come in handy, especially for workshops
where you may need to have users at a set starting point, with data
imported and such.

Best,
Mike



On Sat, Jul 26, 2014 at 4:30 AM, Stefan Keller sfkel...@gmail.com wrote:

 Hi Michael

 After the OSGeo Vienna Code Sprint I've launched a (german) page here:
 http://giswiki.hsr.ch/QGIS-Materialien

 My idea was to wait until there's a learning material space at qgis.org.
 = Maybe it's time now to launch such a subsite (in english and/or for
 each language)?
 (perhaps somebody of the qgis.org admins can help?)

 Let me also mention, that we're using also a QGIS Portable for
 Education (reduced power user functionality) and members of my
 Geometa Lab) launched at the code sprint 1. QGIS plugin Quiz and 2.
 an All-in-one Project. The latter is similar to  ArcGIS Layer and
 ArcGIS Map Packages and allows to package and exchange whole set of
 project, configuration, symbology, data and instructional files:
 http://giswiki.hsr.ch/QGIS_All-in-one_Project_Plugin

 --Stefan

 2014-07-26 10:14 GMT+02:00 labiancamaril...@libero.it
 labiancamaril...@libero.it:
 
  Hi,
  Thank you so much for the very useful material.
  I would suggest to all those who, like you publish lecture notes,
  tutorialsalso provide indication to find databases containing
 shapefile
  or data.
  Thanks.
 
  Messaggio originale
  Da: mtreg...@gmail.com
  Data: 26/07/2014 6.49
  A: qgis-user@lists.osgeo.orgqgis-user@lists.osgeo.org
  Ogg: [Qgis-user] QGIS 2.4 Basic Tutorial
 
 
  Hi All,
 
  I developed a tutorial for a 1/2 day workshop that I conducted at my
  university, and want to make the materials public. I've got them all in a
  GitHub repository for now, with the main document available as .pdf,
 .doc,
  and .md files (the .md needs some work for final formatting before
  conversion to HTML or something).  I've also posted the data files that i
  used in a .zip folder (I've checked with the providers and confirmed
 that is
  okay).
 
  The repository is here: https://github.com/mtreg/QGIS-Tutorial
 
  I'd be happy to have comments or edits, and any assistance improving
 text as
  is necessary. I know the md file is probably best for managing and
 updating
  into the future, but would need the most help with that, as I'm new to
 using
  markdown.
 
  I hope it is useful to at least some folks - I know similar tutorials
 exist,
  at least up through earlier versions of QGIS 2.x, but wanted to make my
 own
  that is relevant to data in my field.
 
  If there is another place these materials should be posted, please let me
  now.
 
  Cheers,
  Mike
 
 
 
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[Qgis-user] Opening Raster from ESRI .GDB

[Michael Treglia]

Hi All,

I've Googled around, and it seems like this isn't currently possible, but
wanted to check with folks on this list for any solution...

A lot of data being produced by agencies is now available only as ESRI .gdb
files. A dataset I'm particularly interested in working with is a gridded
soil dataset (
http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ref/?cid=nrcs142p2_053628
)

These particular data are in raster format, stored as Arc 10.1 .gdb,
available from here: http://datagateway.nrcs.usda.gov/GDGOrder.aspx

Any suggestions are appreciated.

Thanks!
Mike
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Re: [Qgis-user] Opening Raster from ESRI .GDB

[Michael Treglia]

Hi Even,

Thanks a lot for the quick response - I really appreciate your work in
dealing with the GDB files!

That sounds great! Let me know if you need more data examples and such.

Just a quick question - .gdb is not typically forward and backward
compatible across Arc versions, right? [I've definitely had .gdb files that
don't work in QGIS, while some do, so I have assumed that it was due to
versioning issues - is that right? Or should I be doing some
trouble-shooting?]

Thanks again, and best regards,
Mike


On Thu, Jul 24, 2014 at 3:27 PM, Even Rouault even.roua...@mines-paris.org
wrote:

 Le jeudi 24 juillet 2014 18:19:14, Michael Treglia a écrit :
  Hi All,
 
  I've Googled around, and it seems like this isn't currently possible, but
  wanted to check with folks on this list for any solution...
 
  A lot of data being produced by agencies is now available only as ESRI
 .gdb
  files. A dataset I'm particularly interested in working with is a gridded
  soil dataset (
 
 http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ref/?cid=nrcs142p2_05
  3628 )
 
  These particular data are in raster format, stored as Arc 10.1 .gdb,
  available from here: http://datagateway.nrcs.usda.gov/GDGOrder.aspx

 Mike,

 When I reverse-engineered the vector part of FileGDB format that lead to
 the
 OGR OpenFileGDB driver of GDAL 1.11, I came through a few raster GDB
 samples.
 Dealing with them was not in the scope of the work that was funded, but
 from
 what I've seen, I've good hope that decoding them would be reachable. Would
 need some extra investigation of course to confirm and complementary
 funding...

 Best regards,

 Even

 
  Any suggestions are appreciated.
 
  Thanks!
  Mike

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Re: [Qgis-user] Opening Raster from ESRI .GDB

[Michael Treglia]

Even and Alex,

Thanks! That definitely clarifies some things.

I just tried two GDB files with ESRI FileGDB and OpenFileGDB in QGIS. One
.gdb file worked fine with both ESRI FileGDB and OpenFileGDB.  The other
didn't work with either.  I don't know what Arc version the latter was
created in or anything, but I can try and find out and get back to you in
the future.

Best regards,
Mike


On Thu, Jul 24, 2014 at 4:19 PM, Even Rouault even.roua...@mines-paris.org
wrote:

 Le jeudi 24 juillet 2014 22:04:00, Alex Mandel a écrit :
  Sorta, there are 2 drivers for GDB. The open GDB that Even has been
  working on and the official ESRI GDB api.
 
  The ESRI GDB api and Arc instance are not backwards compatible, once you
  upgrade a gdb to the latest it only works with the latest and there's
  often no way to write an older variant.

 The ESRI FileGDB SDK can only read gdb that have been created by ArcGIS
 9.X.
 The OpenFileGDB driver can (well, at least on all available samples I have
 worked on). See http://gdal.org/drv_openfilegdb.html for a comparison of
 both
 drivers

 
  The open GDB driver I think allows you to read any version and write
  older versions if you need to without auto-upgrading.

 Only reading. Writing hasn't been implemented although we probably have
 almost
 everything needed to implement it one day.

 
  Back to your original question does the ESRI gdb driver work for you use
  case for now? On windows I think you can get it with OSGeo4w on Linux
  you need to download the SDK from ESRI and recompile GDAL -

 Latest OSGeo4W must have GDAL 1.11, so you won't need recompiling anything.
 Check with ogrinfo --formats if OpenFileGDB shows in the list.

  but I don't
  know if this is vector and raster or just vector.

 ESRI FileGDB SDK only supports vector too. So no closed-source or
 open-source
 solutions for raster yet.

 
  Thanks,
  Alex
 
  On 07/24/2014 12:56 PM, Michael Treglia wrote:
   Hi Even,
  
   Thanks a lot for the quick response - I really appreciate your work in
   dealing with the GDB files!
  
   That sounds great! Let me know if you need more data examples and such.
  
   Just a quick question - .gdb is not typically forward and backward
   compatible across Arc versions, right? [I've definitely had .gdb files
   that don't work in QGIS, while some do, so I have assumed that it was
   due to versioning issues - is that right? Or should I be doing some
   trouble-shooting?]
  
   Thanks again, and best regards,
   Mike
  
  
   On Thu, Jul 24, 2014 at 3:27 PM, Even Rouault
   even.roua...@mines-paris.org
  
   wrote:
   Le jeudi 24 juillet 2014 18:19:14, Michael Treglia a écrit :
   Hi All,
  
   I've Googled around, and it seems like this isn't currently possible,
   but wanted to check with folks on this list for any solution...
  
   A lot of data being produced by agencies is now available only as
 ESRI
  
   .gdb
  
   files. A dataset I'm particularly interested in working with is a
   gridded soil dataset (
  
  
 http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ref/?cid=nrcs142p2
   _05
  
   3628 )
  
   These particular data are in raster format, stored as Arc 10.1 .gdb,
   available from here: http://datagateway.nrcs.usda.gov/GDGOrder.aspx
  
   Mike,
  
   When I reverse-engineered the vector part of FileGDB format that lead
 to
   the
   OGR OpenFileGDB driver of GDAL 1.11, I came through a few raster GDB
   samples.
   Dealing with them was not in the scope of the work that was funded,
 but
   from
   what I've seen, I've good hope that decoding them would be reachable.
   Would need some extra investigation of course to confirm and
   complementary funding...
  
   Best regards,
  
   Even
  
   Any suggestions are appreciated.
  
   Thanks!
   Mike
  
   --
   Geospatial professional services
   http://even.rouault.free.fr/services.html
  
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Re: [Qgis-user] I cannot install GRASS when installing QGIS 2.4 trough OSGeo4W installer in windows 8.1

[Michael Treglia]

Manuel,

Is it giving you any specific error? Or just not run? Or is it freezing up
QGIS?

One thing to try is to make sure it is looking to the appropriate folder
for GRASS - especially if you changed versions of QGIS and GRASS in your
latest OSGEO4W update. To do that:
1) Go to the Processing Menu (via the Menu Bar at top)
2) Go to Options and Configuration
3) Expand the section for Providers
4) Expand the section for GRASS Commands
5) Check that locations for the GRASS Folder and Msys folder are correct
6) Click OK

If that's not it, I'm not sure off-hand - we'll need more details to
trouble-shoot.
hope that helps
mike


On Sat, Jul 19, 2014 at 12:17 PM, Manuel Spínola mspinol...@gmail.com
wrote:

 Dear list members,

 When insalling QGIS 2.4 in Windows 8.1 thorugh OSGeo4W I include GRASS in
 the installation but I cannot see GRASS in QGIS and I cannot run GRASS
 algorithms in Processing.


 Best,

 Manuel

 --
 *Manuel Spínola, Ph.D.*
 Instituto Internacional en Conservación y Manejo de Vida Silvestre
 Universidad Nacional
 Apartado 1350-3000
 Heredia
 COSTA RICA
 mspin...@una.ac.cr
 mspinol...@gmail.com
 Teléfono: (506) 2277-3598
 Fax: (506) 2237-7036
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Re: [Qgis-user] Problems with GRASS Toolbox Freezing a Mac

[Michael Treglia]

Hi Marcel,

QGIS installers were obtained through Kyngchaos.

Thanks!
MIke


On Fri, Jul 11, 2014 at 1:38 AM, Marcel Radischat m.radisc...@gin-n.de
wrote:

 Hi Michael!

 Do you have further hints on how QGIS got installed? Was it with the
 installers provided by Kyngchaos or via homebrew?



 On 11 Jul 2014, at 01:24, Michael Treglia mtreg...@gmail.com wrote:

  Hi All,
 
  I'm teaching a small workshop with QGIS, and some of the participants
 are using Macs - I haven't gotten to try it out too much, and generally
 things seem to be working okay. But, one of the few Macs I was able to try
 it on had the following issue (running OS 10.8.5):
 
  When trying to use any GRASS function from the processing  toolbox, the
 cursor would turn into the spinning beachball/pinwheel and QGIS would
 become non-responsive, requiring a force-quit. The computer originally had
 QGIS 2.2 installed, and we upgraded to 2.4 to see if that would help (GDAL
 1.11 and MATPLOTLIB were already installed so we left those.)
 
  I checked the Toolbox settings and it looked like the path for GRASS was
 correct. Any suggestions on what else to try or check? (I'm not usually a
 Mac user, so any thoughts are appreciated).
 
  Thanks!
  Mike
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[Qgis-user] Problems with GRASS Toolbox Freezing a Mac

[Michael Treglia]

Hi All,

I'm teaching a small workshop with QGIS, and some of the participants are
using Macs - I haven't gotten to try it out too much, and generally things
seem to be working okay. But, one of the few Macs I was able to try it on
had the following issue (running OS 10.8.5):

When trying to use any GRASS function from the processing  toolbox, the
cursor would turn into the spinning beachball/pinwheel and QGIS would
become non-responsive, requiring a force-quit. The computer originally had
QGIS 2.2 installed, and we upgraded to 2.4 to see if that would help (GDAL
1.11 and MATPLOTLIB were already installed so we left those.)

I checked the Toolbox settings and it looked like the path for GRASS was
correct. Any suggestions on what else to try or check? (I'm not usually a
Mac user, so any thoughts are appreciated).

Thanks!
Mike
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