[Qgis-user] CAD Digitize

[Paolo Cavallini]

Hi all.
Just published this plugin, looks quite interesting - enjoy!
All the best.
-- 
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Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html
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Re: [Qgis-user] Android Camera App with compass bearing

[Zoltan Szecsei]

Hi Alex/All,
Thanks for the thoughts - my comments interspersed with your.

Kind regards,
Zoltan

On 2014/11/04 23:17, Alex Mandel wrote:

On 11/04/2014 04:55 AM, Zoltan Szecsei wrote:

Hi,
I need to do a field trip and take some photos.
I've been googling around, but cannot find an app that will burn both
GPS position _and compass bearing_ into either the image, or just the
exif data for that image.

Anyone got any experience in this need?

Thanks & regards,
Zoltan



Maybe, http://geopaparazzi.github.io/geopaparazzi/
"georeferenced and orientated pictures"

And now my long rant before I remembered the above link...
I manually downloaded the latest version (newer than that on Play Store) 
and it still does not record bearing - even though the app does have a 
bearing tool.
I checked the website and recording bearing into EXIF is not even on the 
developer's long wish-list
I have emailed the developer, with a hope to at least get it onto the 
wish-list.


GPS data is an on/off toggle on most Android devices. Bearing does
appear possible according to the exif specs, but in practice is rare.
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/GPS.html
Yes, I checked that last night too - TAGs 0x0017 and 0x0018 relate to 
bearing info.


However I don't see any obvious apps for telling the phone you want to
capture that. I'm also not sure all phones are capable of calculating
bearing when not moving.

So my suggested work around would be a GPS Logging application of which
there are several. Then you can pull the bearing calculation out after
the fact, if it was while moving.

Sigh, nope.
(In my kind of) Field trip data collection (& photography) often 
involves driving to a feature, leaning out the car window and taking a 
snap-shot, so recording moving direction will not help at all.
Note that bearing accuracy is NOT that critical, it needs only to be 
reasonably indicative.


If stationary, you might need to write your own app which lets users
indicate which way they were facing when taking a picture. For someone
who's made an Android application I don't think this is hard.
http://developer.android.com/guide/topics/sensors/sensors_overview.html
Indicates all version of Android support the Magentic sensor.

This example shows how to get the bearing from the API
https://www.codeofaninja.com/2013/08/android-compass-code-example.html
So GPS+Orientation+Camera should be all required.
Yep, true, but the purpose of this thread is to see if this wheel has 
already been invented :-)


Kinda busts my GPS logging idea, since the bearing information comes
from a different sensor than the GPS it won't be in the NMEA strings
even if you captured them.
What? You not 'hard core' enough to intercept the NMEA stream and insert 
"bearing-on-the-fly" by back-calculating the incoming coords?

(Just pulling your leg - thanks for your interest in this topic :-) )


Thanks,
Alex



--

===
Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

P.O. Box 7, Muizenberg 7950, South Africa.

Mobile: +27-83-6004028
Fax:+27-86-6115323 www.geograph.co.za
===

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[Qgis-user] Processing compatibility with SAGA 2.1.3

[samuelm...@gmail.com]

Hi. I updated the latest stable versions of QGIS v2.6 and SAGA GIS
v2.1.3. However
I have seen that reported some bugs with the processing module and
ParameterBoolean. To correct the compactability with the latest of
SAGA GIS, needs
to be added or changed in [1]

if param.value:
command += ' -' + param.name

for something like:

if param.value:
command += ' -' + param.name + " true"

regards,

Samuel Mesa.

[1]
https://github.com/qgis/QGIS/blob/60706275e8c913e6a2c104827d3c854b8c573cb6/python/plugins/processing/algs/saga/SagaAlgorithm.py#L196
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Re: [Qgis-user] Android Camera App with compass bearing

[Andreas Neumann]

Hi,

I have DSLR (Nikon) and a separate GPS logging device from Solmeta 
(http://www.solmeta.com/) - so if you can also use a DSLR in your 
project, the Solmeta tagger is really excellent and writes everything 
directly into the image metadata. It is also a tracking device and 
records your positions at regular time interval, no matter if you are 
taking pictures or not.


Just wanted to make you aware of this. The compass/clino is probably a 
more precise than on a Smartphone.


Andreas

On 04.11.2014 22:17, Alex Mandel wrote:

On 11/04/2014 04:55 AM, Zoltan Szecsei wrote:

Hi,
I need to do a field trip and take some photos.
I've been googling around, but cannot find an app that will burn both
GPS position _and compass bearing_ into either the image, or just the
exif data for that image.

Anyone got any experience in this need?

Thanks & regards,
Zoltan



Maybe, http://geopaparazzi.github.io/geopaparazzi/
"georeferenced and orientated pictures"

And now my long rant before I remembered the above link...

GPS data is an on/off toggle on most Android devices. Bearing does
appear possible according to the exif specs, but in practice is rare.
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/GPS.html

However I don't see any obvious apps for telling the phone you want to
capture that. I'm also not sure all phones are capable of calculating
bearing when not moving.

So my suggested work around would be a GPS Logging application of which
there are several. Then you can pull the bearing calculation out after
the fact, if it was while moving.

If stationary, you might need to write your own app which lets users
indicate which way they were facing when taking a picture. For someone
who's made an Android application I don't think this is hard.
http://developer.android.com/guide/topics/sensors/sensors_overview.html
Indicates all version of Android support the Magentic sensor.

This example shows how to get the bearing from the API
https://www.codeofaninja.com/2013/08/android-compass-code-example.html
So GPS+Orientation+Camera should be all required.

Kinda busts my GPS logging idea, since the bearing information comes
from a different sensor than the GPS it won't be in the NMEA strings
even if you captured them.

Thanks,
Alex
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Re: [Qgis-user] Android Camera App with compass bearing

[Alex Mandel]

On 11/04/2014 04:55 AM, Zoltan Szecsei wrote:
> Hi,
> I need to do a field trip and take some photos.
> I've been googling around, but cannot find an app that will burn both
> GPS position _and compass bearing_ into either the image, or just the
> exif data for that image.
> 
> Anyone got any experience in this need?
> 
> Thanks & regards,
> Zoltan
> 
>

Maybe, http://geopaparazzi.github.io/geopaparazzi/
"georeferenced and orientated pictures"

And now my long rant before I remembered the above link...

GPS data is an on/off toggle on most Android devices. Bearing does
appear possible according to the exif specs, but in practice is rare.
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/GPS.html

However I don't see any obvious apps for telling the phone you want to
capture that. I'm also not sure all phones are capable of calculating
bearing when not moving.

So my suggested work around would be a GPS Logging application of which
there are several. Then you can pull the bearing calculation out after
the fact, if it was while moving.

If stationary, you might need to write your own app which lets users
indicate which way they were facing when taking a picture. For someone
who's made an Android application I don't think this is hard.
http://developer.android.com/guide/topics/sensors/sensors_overview.html
Indicates all version of Android support the Magentic sensor.

This example shows how to get the bearing from the API
https://www.codeofaninja.com/2013/08/android-compass-code-example.html
So GPS+Orientation+Camera should be all required.

Kinda busts my GPS logging idea, since the bearing information comes
from a different sensor than the GPS it won't be in the NMEA strings
even if you captured them.

Thanks,
Alex
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[Qgis-user] Missing Attribute Table in QGIS Browser QGIS 2.6 (64 bit)

[Jane Kogelschatz]

Hello, 

I just downloaded QGIS 2.6 (64 bit).

It looks Wonderful !!

I cannot see the Attribute table in the QGIS Browser 2.6.0 (just the feature
id).

I can see the Attribute table in the QGIS Desktop 2.6.0

Can you please suggest what I should do to correct this ?

 

I am running Windows 7 Home Premium.

 

Thank you,

Jane Kogelschatz

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Re: [Qgis-user] CASE WHEN .... Field Calculator.

[Håvard Tveite]

Both

CASE WHEN "A" like '30STH400500' THEN (30 + 20 + 10) ELSE 0 END

and

CASE WHEN "A" = '30STH400500' THEN (30 + 20 + 10) ELSE 0 END

should work.

If you want to assign this to D, you must specify D in
"Output field name".

Håvard

On 04. nov. 2014 20:29, Matías Taborda Barroso wrote:

Hi.

I'm spanish user, sorry for my English. I'm using Google translator.

I have a .shp points file with attribute table. Like this...

|-- A -- -- B --  -- C --
   QString DoubleDoubleData type
30STH400500 130
30STH400500 130
30STH400500 130
30STH400500 130
......  ...
......  ...

30STH400500 210
30STH400500 210
30STH400500 210
30STH400500 210
......  
......  

30STH400500 320
30STH400500 320
30STH400500 320
30STH400500 320
......  
......  

30STH450450 110

...
...||
|

I have 50 different valuesv of A field.

And now, I want a new field, "D" (Data type, double) like this in field
calculator:

|WHEN "A"='30STH400500' THEN/*D = 30 + 20 + 10 = 50*/|

I don't know if I have explained it.

I've tried using CASE WHEN A. THEN  ELSE but I don't get it.

I think that with plugin Fieldpyculator, but I don't know python

Please, help me.

Thanks.





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[Qgis-user] CASE WHEN .... Field Calculator.

[Matías Taborda Barroso]

Hi.

I'm spanish user, sorry for my English. I'm using Google translator.

I have a .shp points file with attribute table. Like this...

-- A -- -- B --  -- C --
  QString DoubleDoubleData type
30STH400500 130
30STH400500 130
30STH400500 130
30STH400500 130
......  ...
......  ...

30STH400500 210
30STH400500 210
30STH400500 210
30STH400500 210
......  
......  

30STH400500 320
30STH400500 320
30STH400500 320
30STH400500 320
......  
......  

30STH450450 110

...
...

I have 50 different valuesv of A field.

And now, I want a new field, "D" (Data type, double) like this in field
calculator:

WHEN "A"='30STH400500' THEN *D = 30 + 20 + 10 = 50*

I don't know if I have explained it.

I've tried using CASE WHEN A. THEN  ELSE but I don't get it.

I think that with plugin Fieldpyculator, but I don't know python

Please, help me.

Thanks.
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[Qgis-user] "Selection color" in the print composer

[Otto Dassau]

Hi,

is it possible to use the defined "Selection Color" (from Options -> Canvas
& Legend) also in the print composer for a selected line feature?

Thanks
Otto
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Re: [Qgis-user] (no subject)

[Paolo Cavallini]

Il 04/11/2014 16:43, laura guy ha scritto:
> Hi,
> 
> I am trying to install and use Open Layers Plugin in QGIS version 2.4.0

Laura: first of all, please upgrade to qgis 2.6 and see if the problem persist.
all the best.

-- 
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Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html
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[Qgis-user] (no subject)

[laura guy]

Hi,

I am trying to install and use Open Layers Plugin in QGIS version 2.4.0

The following message comes up:

The plugin is broken. Python said:
'QPyNullVariant' object has no attribute'_getitem_'

Could you help please? What do i need to do?
(Ps I am working on a MAC)

Thanks,

Laura
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Re: [Qgis-user] QGIS Analytical combinations

[ferran fabregas]

Thanks! That make sense, I'll try and I will let you know.

El mar., 4 de noviembre de 2014 15:26, enricofer 
escribió:

> I suggest you to put everything in spatialite database and, assuming that
> 1) GRID is the polygon layer with grid definition
> 2) POINTS is the point layer with population data
> 3) POINTS has a field "pop" with population data
> 4) both layers have a keyfield named "id"
> 5) both layer have "geom" as geometries field
>
> Run the following query with dbmanager:
>
> SELECT DISTINCT GRID.id, SUM(POINTS.pop) AS POPxGRID
> FROM POINTS
> INNER JOIN GRID ON ST_Within(POINTS.Geometry,GRID.geom)
> GROUP BY GRID.ID
>
> you will get a table with a reference to a grid feature ID and the sum of
> the population of the points that are within the grid feature
>
> I hope this help you.
>
> Enrico Ferreguti
>
>
>
> --
> View this message in context: http://osgeo-org.1560.x6.
> nabble.com/QGIS-Analytical-combinations-tp5171127p5171139.html
> Sent from the Quantum GIS - User mailing list archive at Nabble.com.
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Re: [Qgis-user] QGIS Analytical combinations

[enricofer]

I suggest you to put everything in spatialite database and, assuming that
1) GRID is the polygon layer with grid definition
2) POINTS is the point layer with population data
3) POINTS has a field "pop" with population data
4) both layers have a keyfield named "id"
5) both layer have "geom" as geometries field

Run the following query with dbmanager:

SELECT DISTINCT GRID.id, SUM(POINTS.pop) AS POPxGRID
FROM POINTS
INNER JOIN GRID ON ST_Within(POINTS.Geometry,GRID.geom)
GROUP BY GRID.ID

you will get a table with a reference to a grid feature ID and the sum of
the population of the points that are within the grid feature

I hope this help you.

Enrico Ferreguti



--
View this message in context: 
http://osgeo-org.1560.x6.nabble.com/QGIS-Analytical-combinations-tp5171127p5171139.html
Sent from the Quantum GIS - User mailing list archive at Nabble.com.
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Re: [Qgis-user] edit spatialite with db manager

[Ziegler Stefan]

Thanks for the clarification.

Stefan

> -Ursprüngliche Nachricht-
> Von: qgis-user-boun...@lists.osgeo.org 
> [mailto:qgis-user-boun...@lists.osgeo.org] Im
> Auftrag von Saber Razmjooei
> Gesendet: Dienstag, 4. November 2014 10:11
> An: qgis-user@lists.osgeo.org
> Betreff: Re: [Qgis-user] edit spatialite with db manager
> 
> It is SQLite limitation!!:
> http://hub.qgis.org/issues/2423
> 
> Cheers,
> Saber
> 
> -Original Message-
> From: qgis-user-boun...@lists.osgeo.org
> [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Ziegler Stefan
> Sent: 04 November 2014 09:04
> To: 'qgis-user@lists.osgeo.org'
> Subject: [Qgis-user] edit spatialite with db manager
> 
> Hi
> 
> I'm trying to e.g. rename a column of a spatialite layer with db manager.
> But in the "Table properties" window the "Edit Column" and "Delete Column"
> buttons are greyed out. Did I miss some depencies or something like that?
> 
> I'm on QGIS master and Ubuntu 14.04.
> 
> regards
> Stefan
> 
> Freundliche Grüsse
> Stefan Ziegler
> Kantonsgeometer
> 
> Amt für Geoinformation
> Amtliche Vermessung
> Rötistrasse 4
> 4500 Solothurn
> 
> Telefon +41 32 627 75 96
> Telefax +41 32 627 75 98
> stefan.zieg...@bd.so.ch
> http://www.so.ch
> 
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[Qgis-user] QGIS Analytical combinations

[ferran fabregas]

Hi! My name is Ferran and I'm new to QGIS, I think that's as great GIS and
I love Python, so, I learning it.

My first steps was prettty straigthforward until now. I'm stucked.

I'm sure my doubt will be trivial, but I'm searching on the net last few
hours and I cannot get it.

I'll tell you my case:

-I have a point based shape with an attribute (population)
-I have created a grid with the QGIS tools.

I want to get all the points inside each cell of the grid, sum the
population and store this data (the sum of the popultion of all points of
each cell) in a new grid attribute

So, I'll get a grid with a new atribute with the aggregate population of
all the points inside each cell.

I'm going mad to do that... I cannot see how...

If anyone can help I'll be s thankfull

Thanks in advance,

*Ferran*
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Re: [Qgis-user] Python script to iterate through attributes and then refresh the canvas - doesn't show any map....

[Frank van Baar]

Hi Joris,

 

Thanks for your suggestion - didn't realize atlas worked this way. It
however does not completely do what I want to do - the layer which it
changes the filter for also has specific formatting to highlight the region
etc. AND the OSM layer doesn't always display right. 

 

Any other suggestions anyone?


Frank

 

Van: Joris Hintjens [mailto:joris...@gmail.com] 
Verzonden: 04 November 2014 11:27
Aan: Frank van Baar
CC: Qgis-user@lists.osgeo.org
Onderwerp: Re: [Qgis-user] Python script to iterate through attributes and
then refresh the canvas - doesn't show any map

 

Why not use atlas generation in the print composer?

 Seems to me this corresponds with your "what i'm trying to achieve"

grts

Joris

 

 

Op 4-nov.-2014, om 09:14 heeft Frank van Baar  het
volgende geschreven:





Hi,

 

Am completely stuck with a QGIS project in Python and tried everything but
nothing seems to work. The python script does work as such BUT the canvas
never shows the map and therefor the exported maps are empty.. 

 

What I'm trying to achieve:

.   Create a Python script that iterates through a series of ca. 2500
polygons based on attribute value, zoom to layer extend and save the canvas
for each attribute as an image file.

.   I then use the image files in other documents

 

The issue is that while manually I get the canvas to reload and display the
map, this doesn't happen when running the python script. Have tried couple
of ways: 

1.  Don't load the project each time and just change the filter

2.  Add sleep timers to give the canvas time to refresh etc.

3.  Tried different QGIS versions (2.2, 2.4 & 2.6 on Win 64x)

 

But all to no avail.. Hope somebody's got a great idea how to solve it.

 

Regards,

Frank

 

Python code:

 

# File location & specifications 

PROJECTPATH = 'C:/Users/Frank/Documents /Targetting/Kaarten/'

PROJECTFILE = 'C:/Users/Frank/Documents
/Targetting/TargettingkaartV26qgs.qgs'

EXTSNAPSHOTS = '.jpg'

EXTSNAPSHOTS2 = '.png'

SUFFIX = '65Plus_v1'

last_id = 1

while last_id < 5:

# Clear map canvas

QgsMapLayerRegistry.instance().removeAllMapLayers()

qgis.utils.iface.mapCanvas().refresh()



# Open QGIS project

QgsProject.instance().setFileName(PROJECTFILE)

QgsProject.instance().read()

qgis.utils.iface.mapCanvas().refresh()

time.sleep(30)  

canvas = qgis.utils.iface.mapCanvas()

acl = canvas.layer(0)

qgis.utils.iface.mapCanvas().layer(0).selectAll()

selection = 'RijNo = ' + str(last_id) 



acl.setSubsetString( selection )

acl.triggerRepaint

canvas.layer(1).triggerRepaint  

time.sleep(5)   

qgis.utils.iface.setActiveLayer(acl)

# Zoom in and out to refresh potential issues with OpenLayer

canvas.zoomByFactor(3)

canvas.zoomByFactor(0.5)

qgis.utils.iface.zoomToActiveLayer()

qgis.utils.iface.mapCanvas().refresh()



time.sleep(10)

# Save project

p=QgsProject.instance()

p.setFileName(PROJECTFILE)

p.write()

# Save content of map canvas as image

p = str(last_id) + 'kaart_' 

qgis.utils.iface.mapCanvas().saveAsImage(PROJECTPATH+ p + SUFFIX +
EXTSNAPSHOTS)

last_id = last_id +1

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[Qgis-user] Android Camera App with compass bearing

[Zoltan Szecsei]

Hi,
I need to do a field trip and take some photos.
I've been googling around, but cannot find an app that will burn both 
GPS position _and compass bearing_ into either the image, or just the 
exif data for that image.


Anyone got any experience in this need?

Thanks & regards,
Zoltan



--

===
Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

P.O. Box 7, Muizenberg 7950, South Africa.

Mobile: +27-83-6004028
Fax:+27-86-6115323 www.geograph.co.za
===

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Re: [Qgis-user] Python script to iterate through attributes and then refresh the canvas - doesn't show any map....

[Joris Hintjens]

Why not use atlas generation in the print composer?
 Seems to me this corresponds with your „what i’m trying to achieve”
grts
Joris


Op 4-nov.-2014, om 09:14 heeft Frank van Baar  het volgende 
geschreven:

> Hi,
> 
> 
> Am completely stuck with a QGIS project in Python and tried everything but 
> nothing seems to work. The python script does work as such BUT the canvas 
> never shows the map and therefor the exported maps are empty….
> 
> 
> What I’m trying to achieve:
> 
> ·   Create a Python script that iterates through a series of ca. 2500 
> polygons based on attribute value, zoom to layer extend and save the canvas 
> for each attribute as an image file.
> 
> ·   I then use the image files in other documents
> 
> 
> The issue is that while manually I get the canvas to reload and display the 
> map, this doesn’t happen when running the python script. Have tried couple of 
> ways:
> 
> 1.  Don’t load the project each time and just change the filter
> 
> 2.  Add sleep timers to give the canvas time to refresh etc.
> 
> 3.  Tried different QGIS versions (2.2, 2.4 & 2.6 on Win 64x)
> 
> 
> But all to no avail…. Hope somebody’s got a great idea how to solve it.
> 
> 
> Regards,
> 
> Frank
> 
> 
> Python code:
> 
> 
> # File location & specifications
> 
> PROJECTPATH = 'C:/Users/Frank/Documents /Targetting/Kaarten/'
> 
> PROJECTFILE = 'C:/Users/Frank/Documents /Targetting/TargettingkaartV26qgs.qgs'
> 
> EXTSNAPSHOTS = '.jpg'
> 
> EXTSNAPSHOTS2 = '.png'
> 
> SUFFIX = '65Plus_v1'
> 
> last_id = 1
> 
> while last_id < 5:
> 
> # Clear map canvas
> 
> QgsMapLayerRegistry.instance().removeAllMapLayers()
> 
> qgis.utils.iface.mapCanvas().refresh()
> 
> 
> # Open QGIS project
> 
> QgsProject.instance().setFileName(PROJECTFILE)
> 
> QgsProject.instance().read()
> 
> qgis.utils.iface.mapCanvas().refresh()
> 
> time.sleep(30) 
> 
> canvas = qgis.utils.iface.mapCanvas()
> 
> acl = canvas.layer(0)
> 
> qgis.utils.iface.mapCanvas().layer(0).selectAll()
> 
> selection = 'RijNo = ' + str(last_id)
> 
> 
> acl.setSubsetString( selection )
> 
> acl.triggerRepaint
> 
> canvas.layer(1).triggerRepaint 
> 
> time.sleep(5)  
> 
> qgis.utils.iface.setActiveLayer(acl)
> 
> # Zoom in and out to refresh potential issues with OpenLayer
> 
> canvas.zoomByFactor(3)
> 
> canvas.zoomByFactor(0.5)
> 
> qgis.utils.iface.zoomToActiveLayer()
> 
> qgis.utils.iface.mapCanvas().refresh()
> 
> 
> time.sleep(10)
> 
> # Save project
> 
> p=QgsProject.instance()
> 
> p.setFileName(PROJECTFILE)
> 
> p.write()
> 
> # Save content of map canvas as image
> 
> p = str(last_id) + 'kaart_'
> 
> qgis.utils.iface.mapCanvas().saveAsImage(PROJECTPATH+ p + SUFFIX + 
> EXTSNAPSHOTS)
> 
> last_id = last_id +1
> 
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Re: [Qgis-user] Node tool: could not snap to a segment on the current layer

[enricofer]

I found the solution
The parameter in Options|Digitizing|Snapping "Search radius for vertex
edits" has to be non zero... With zero value Node tool gives the reported
message.
 



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Re: [Qgis-user] edit spatialite with db manager

[Saber Razmjooei]

It is SQLite limitation!!:
http://hub.qgis.org/issues/2423

Cheers,
Saber

-Original Message-
From: qgis-user-boun...@lists.osgeo.org
[mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Ziegler Stefan
Sent: 04 November 2014 09:04
To: 'qgis-user@lists.osgeo.org'
Subject: [Qgis-user] edit spatialite with db manager

Hi

I'm trying to e.g. rename a column of a spatialite layer with db manager.
But in the "Table properties" window the "Edit Column" and "Delete Column"
buttons are greyed out. Did I miss some depencies or something like that?

I'm on QGIS master and Ubuntu 14.04.

regards
Stefan

Freundliche Grüsse 
Stefan Ziegler 
Kantonsgeometer 

Amt für Geoinformation
Amtliche Vermessung 
Rötistrasse 4 
4500 Solothurn 

Telefon +41 32 627 75 96
Telefax +41 32 627 75 98 
stefan.zieg...@bd.so.ch
http://www.so.ch 

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Re: [Qgis-user] edit spatialite with db manager

[Matthias Kuhn]

Hi Stefan,

That's a limitation of sqlite and not of the db-manager.

There's a workaround to it
http://stackoverflow.com/questions/805363/how-do-i-rename-a-column-in-a-sqlite-database-table

Matthias

On 04.11.2014 10:04, Ziegler Stefan wrote:
> Hi
>
> I'm trying to e.g. rename a column of a spatialite layer with db manager. But 
> in the "Table properties" window the "Edit Column" and "Delete Column" 
> buttons are greyed out. Did I miss some depencies or something like that?
>
> I'm on QGIS master and Ubuntu 14.04.
>
> regards
> Stefan
>
> Freundliche Grüsse 
> Stefan Ziegler 
> Kantonsgeometer 
>
> Amt für Geoinformation
> Amtliche Vermessung 
> Rötistrasse 4 
> 4500 Solothurn 
>
> Telefon +41 32 627 75 96
> Telefax +41 32 627 75 98 
> stefan.zieg...@bd.so.ch
> http://www.so.ch 
>
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Re: [Qgis-user] Download link for QGIS 2.4 Win standalone?

[Andreas Neumann]

Thanks a lot!

Andreas


On 04.11.2014 09:52, Jürgen E. Fischer wrote:

Hi Andreas,

On Tue, 04. Nov 2014 at 09:45:19 +0100, Andreas Neumann wrote:

As I need to support older QGIS versions in my administration I am now
looking for a standalone QGIS 2.4 win 64 installer, because OSGeo4W is
now at version 2.6. Unfortunately it turns out it is not easy to find
the older versions of the windows standalone installers.
I came to http://qgis.org/downloads/ - but it does not contain the 2.4
installers.

Well, now it's there.   But the downloading

http://qgis.org/downloads/QGIS-OSGeo4W-2.4.0-1-Setup-x86.exe or
http://qgis.org/downloads/QGIS-OSGeo4W-2.4.0-1-Setup-x86_64.exe

would still have worked and triggered the redirects even without the files in
place.


Jürgen



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[Qgis-user] edit spatialite with db manager

[Ziegler Stefan]

Hi

I'm trying to e.g. rename a column of a spatialite layer with db manager. But 
in the "Table properties" window the "Edit Column" and "Delete Column" buttons 
are greyed out. Did I miss some depencies or something like that?

I'm on QGIS master and Ubuntu 14.04.

regards
Stefan

Freundliche Grüsse 
Stefan Ziegler 
Kantonsgeometer 

Amt für Geoinformation
Amtliche Vermessung 
Rötistrasse 4 
4500 Solothurn 

Telefon +41 32 627 75 96
Telefax +41 32 627 75 98 
stefan.zieg...@bd.so.ch
http://www.so.ch 

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Re: [Qgis-user] Download link for QGIS 2.4 Win standalone?

[Jürgen E . Fischer]

Hi Andreas,

On Tue, 04. Nov 2014 at 09:45:19 +0100, Andreas Neumann wrote:
> As I need to support older QGIS versions in my administration I am now  
> looking for a standalone QGIS 2.4 win 64 installer, because OSGeo4W is  
> now at version 2.6. Unfortunately it turns out it is not easy to find  
> the older versions of the windows standalone installers.

> I came to http://qgis.org/downloads/ - but it does not contain the 2.4  
> installers.

Well, now it's there.   But the downloading

http://qgis.org/downloads/QGIS-OSGeo4W-2.4.0-1-Setup-x86.exe or
http://qgis.org/downloads/QGIS-OSGeo4W-2.4.0-1-Setup-x86_64.exe

would still have worked and triggered the redirects even without the files in
place.


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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Re: [Qgis-user] pansharpening i.pansharpening

[Kevin]

For rapid band combinations and pan-sharpening of the latest Landsat-8
satellite imagery, you may take a look at the free and advanced image
fusion software from GeoSage.

The software with 2 simple button clicks:

http://www.geosage.com/highview/features_landsat8.html

If you have the latest QGIS installed, click the 3rd button for GeoTFF ->
KMZ conversion.

Hope this helps.


On Mon, Oct 20, 2014 at 2:56 AM, Daniel S.  wrote:

> Hello
>
> I try to do a pansharpening with some Landsat 8 images. I found this
> instructions  http://planet.qgis.org/planet/tag/landsat/
> 
> but I didn´t find this tool in my QGis 2.4 Grass Gis 7 Toolbox.
> Someone knows where I can find it?
>
>
>
> --
> View this message in context:
> http://osgeo-org.1560.x6.nabble.com/pansharpening-i-pansharpening-tp5168267.html
> Sent from the Quantum GIS - User mailing list archive at Nabble.com.
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[Qgis-user] Download link for QGIS 2.4 Win standalone?

[Andreas Neumann]

Hi,

As I need to support older QGIS versions in my administration I am now 
looking for a standalone QGIS 2.4 win 64 installer, because OSGeo4W is 
now at version 2.6. Unfortunately it turns out it is not easy to find 
the older versions of the windows standalone installers.


I came to http://qgis.org/downloads/ - but it does not contain the 2.4 
installers.


Can you help me to find the correct download?

Thanks a lot,
Andreas
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[Qgis-user] Python script to iterate through attributes and then refresh the canvas - doesn't show any map....

[Frank van Baar]

Hi,

Am completely stuck with a QGIS project in Python and tried everything but 
nothing seems to work. The python script does work as such BUT the canvas never 
shows the map and therefor the exported maps are empty…. 

What I’m trying to achieve:
*   Create a Python script that iterates through a series of ca. 2500 
polygons based on attribute value, zoom to layer extend and save the canvas for 
each attribute as an image file.
*   I then use the image files in other documents

The issue is that while manually I get the canvas to reload and display the 
map, this doesn’t happen when running the python script. Have tried couple of 
ways: 
1.  Don’t load the project each time and just change the filter
2.  Add sleep timers to give the canvas time to refresh etc.
3.  Tried different QGIS versions (2.2, 2.4 & 2.6 on Win 64x)

But all to no avail…. Hope somebody’s got a great idea how to solve it.

Regards,

Frank

Python code:

# File location & specifications 

PROJECTPATH = 'C:/Users/Frank/Documents /Targetting/Kaarten/'
PROJECTFILE = 'C:/Users/Frank/Documents /Targetting/TargettingkaartV26qgs.qgs'
EXTSNAPSHOTS = '.jpg'
EXTSNAPSHOTS2 = '.png'
SUFFIX = '65Plus_v1'

last_id = 1

while last_id < 5:

# Clear map canvas
QgsMapLayerRegistry.instance().removeAllMapLayers()
qgis.utils.iface.mapCanvas().refresh()

# Open QGIS project
QgsProject.instance().setFileName(PROJECTFILE)
QgsProject.instance().read()
qgis.utils.iface.mapCanvas().refresh()

time.sleep(30)  

canvas = qgis.utils.iface.mapCanvas()
acl = canvas.layer(0)
qgis.utils.iface.mapCanvas().layer(0).selectAll()

selection = 'RijNo = ' + str(last_id) 

acl.setSubsetString( selection )
acl.triggerRepaint
canvas.layer(1).triggerRepaint  

time.sleep(5)   

qgis.utils.iface.setActiveLayer(acl)

# Zoom in and out to refresh potential issues with OpenLayer
canvas.zoomByFactor(3)
canvas.zoomByFactor(0.5)
qgis.utils.iface.zoomToActiveLayer()

qgis.utils.iface.mapCanvas().refresh()

time.sleep(10)

# Save project

p=QgsProject.instance()
p.setFileName(PROJECTFILE)
p.write()

# Save content of map canvas as image

p = str(last_id) + 'kaart_' 

qgis.utils.iface.mapCanvas().saveAsImage(PROJECTPATH+ p + SUFFIX + 
EXTSNAPSHOTS)

last_id = last_id +1
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Re: [Qgis-user] Excel Prep to how one line per location

[Frank van Baar]

Hi Sasa,

 

Would use excel to do the manipulation:

 

·Add 2 columns to original sheet with rownumber & number of locations

·Create second sheet that recreates a new list based on lookups/index 
formulas

·Copy second sheet as values into CSV file

 

Have created simple example file (attached).

 

Hope it works.


Frank

 

Van: qgis-user-boun...@lists.osgeo.org 
[mailto:qgis-user-boun...@lists.osgeo.org] Namens Sasa Sullivan
Verzonden: 03 November 2014 20:20
Aan: qgis-user@lists.osgeo.org
Onderwerp: [Qgis-user] Excel Prep to how one line per location

 

Hi All,

 

I need to prep an Excel spreadsheet. Thousands of names and each name with 
multiple locations (some with as few as 3 and others with over 30 locations). 
Is there a way to make a line item for the name (which is only listed once 
initially) based on each location?

 

So If I have Bob Smith row with columns that show his 12 locations can I do 
something to automate my spreadsheet to show Bob Smith with each location on a 
separate line? There are also other columns that need to be duplicated but 
those would remain the same with each line item, only the location would be 
made a new line item. Thanks much in advance

 

Best Regards, 

 

Sasa



ExcelExample.xlsx
Description: MS-Excel 2007 spreadsheet
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