Re: [Qgis-user] QGIS 3.10.1A Geotiff Coordinate Transform Problem

[Mike Flannigan]

Thank you for so thoroughly explaining a problem
I have been having for about a month now.  I
was wondering if I was the only one.

I get errors:
proj_create_from_database: crs not found

and "Invalid data source".

and the file does not open.
I am looking forward to this being corrected
in future versions.


Mike


On 1/19/20 11:19 AM, qgis-user-requ...@lists.osgeo.org wrote:

Date: Sat, 18 Jan 2020 22:10:38 -0500
From: Stewart Holt
To:qgis-user@lists.osgeo.org
Subject: [Qgis-user] QGIS 3.10.1A Geotiff Coordinate Transform Problem
Message-ID:

Content-Type: text/plain; charset="utf-8"

I have QGIS 3.10.1 installed and I can no longer display historic USGS
geofiffs. I probably have not used these since at least version 3.8. I got
a message saying that the transform could not be done. The file had a CRS
that was apparently user generated (automatically) based on NAD27. I have
over 50 of these files and each seems to have a different User CRS. The
project CRS is EPSG:3857.

The transform failure message provided a link to download the grid shift
file ntv2_0.gsb. I clicked the link which downloaded a zip file. I
extracted only  ntv2_0.gsb from it and browsed to it using the "Install
ntv2_0.gsb from Folder..." button. It installed with a message indicating
success. I closed and reopened the project as directed, and selected the
geotiff file layer. There was no error but the canvas was obviously far
from the rest of my project (SE US). I zoomed to the geotiff layer and
selected the Google satellite view. I zoomed out until I recognized the
area as being northern Africa. Approximate center coordinates
were: 32.78461469, -0.00187768.

The projection file GA_Hightower Bald_245924_1988_24000_geo.tif.prj
contains this:

PROJCS["Transverse_Mercator",GEOGCS["GCS_North_American_1927",DATUM["D_North_American_1927",SPHEROID["Clarke_1866",6378206.4,294.9786982]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-83.562918],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["Meter",1]]

Previously, I had not even downloaded the .prj files because QGIS seemed to
handle the geotiff files with no problem. I tried downloading the tfw and
prj files but it made no difference. I also tried to set the CRS for the
geotiff based on the prj file and that gave the same result.

I think that after installing the grid shift file, there is no error
detected but the transformation fails.

Has anyone had any experience with USGS geotiff files and QGIS 3.10.1?

A download link for the files above is:
ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Maps/HistoricalTopo/GeoTIFF/GA/

Any help to solve this would be appreciated.

Thanks,

Stewart Holt
Georgia Appalachian Trail Club



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[Qgis-user] Summer School "Geocomputation" - 1-5 June 2020, Italy

[Giuseppe Amatulli]

Dear colleagues,

In view of enlarging the computation skills in the geographic domain, as
every year, we are running the International Summer School "
*Geocomputation using free and Open Source Software*" organized by Spatial
Ecology (www.spatial-ecology.net) held at the University of Basilicata, in
the magnificent town Matera

, Italy.

This is a wonderful opportunity for PhD students and Post-Doc to achieve
computation skills process and be able to work in Linux supercomputer in a
clever way.

Please forward this opportunity to your network.

Sincerely, Giuseppe Amatulli


*Geocomputation using free and Open Source Software** (1st-5th June 2020)*

A 5 days intense experience opening new horizons on the use of the vast
potentials of *Linux* environment and the command line approach for
*geo-data* massive processing using Bash, AWK, Python, GRASS, QGIS,
GDAL/OGR, R, PKTOOLS. We will guide newcomers and experienced GIS&RS users
who have never used a command line terminal to a stage which will allow
them to understand and apply very advanced open source data processing
routines. Our focus is to enhance a self-learning approach and
programming-languages integration. This allows participants to keep on
progressing and improving their skills in a continuously evolving
technological environment.

More information and registration:

www.spatial-ecology.net
www.facebook.com/spatialecology > see events
twitter: @BigDataEcology

Best regards
Spatial Ecology – Team

-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/


-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/


-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/


-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/


-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/


-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/


-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/


-- 
Giuseppe Amatulli, Ph.D.

Research scientist at
Yale School of Forestry & Environmental Studies
Yale Center for Research Computing
New Haven, 06511
Teaching: http://spatial-ecology.net
Work:  https://environment.yale.edu/profile/giuseppe-amatulli/
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Re: [Qgis-user] MemoryLayerSaver plugin - Is there a way to recover data?

[Chris Crook]

Hi Julien

This is not a known problem/bug to me (MLS author).  Probably wouldn't be much 
use filing a bug report unless you have steps to reproduce creating and then 
failing to read the .mldata file, as there would be no way of testing.  Does it 
report any particular error when it tries to load the file?

Do you know of anything that might have changed between when you saved the 
project and when you are trying to reload it.  What version of QGIS was the 
project saved with.  I doubt that another program would be able to read the 
file if the memory layer saver plugin cannot, it would just be doing the same 
python/Qt stuff that it is already doing.  If the file is corrupt then it might 
be possible to read the data to the point at which it fails.

At the moment it is designed to read all or nothing.  It could be modified 
fairly easily to read the data up to the point at which it fails (either on a 
layer by layer or feature by feature basis).

Cheers
Chris

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Julien 
K.
Sent: Monday, 27 January 2020 9:00 p.m.
To: QGIS Users
Subject: [Qgis-user] MemoryLayerSaver plugin - Is there a way to recover data?

Dear QGis users,

I have a *mldata file generated by MemoryLayerSaver plugin that won't be read 
when opening the associated QGis project.I tried with 3.4.15-LTR, 3.10.2 
rel-dev and dev with no luck, in the QGis project the layers' structure is 
shown but the tables are empty.

The plugin's source code indicates *mldata files are QStreamData, I don't want 
to dive into Python/Qt programing at the moment, so is there a simple way to 
recover the data?

Besides is this a bug or a known problem (i.e. "you've been warned, you should 
save your memory layers as soon as possible")? Should I file a bug report?

Regards,
Julien



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Re: [Qgis-user] Migrating plugins.qgis.org to new server

[Paolo Cavallini]

Thanks for the update, and for your work.
All the best.

Il 27/01/20 17:01, Tim Sutton ha scritto:
> Hi All
> 
> Just an update quickly from our side….we had some problems with the
> switch over so have left the old site running for now. We will try again
> tomorrow and post a similar notice before we do the witch over. Please
> resume uploading your plugins for now.

-- 
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] Migrating plugins.qgis.org to new server

[Tim Sutton]

Hi All

Just an update quickly from our side….we had some problems with the switch over 
so have left the old site running for now. We will try again tomorrow and post 
a similar notice before we do the witch over. Please resume uploading your 
plugins for now.

Regards

Tim

> On 27 Jan 2020, at 09:32, Tim Sutton  wrote:
> 
> Hi all
> 
> This is just to advise you that we will be migrating the plugins.qgis.org 
>  and planet.qgis.org  web 
> sites to a new server over the next hour or two. We do not expect any 
> downtime of these servers during this migration but we do ask you to hold on 
> uploading any new plugins until I post an update announcement indicating that 
> the new server is online and fully operational.
> 
> During this migration, we will be deploying security updates and a platform 
> upgrade to Django 2.x and Python 3 that was performed by Alessandro Pasotti. 
> Dimas Ciptura also migrated the feed platform used for 
> https://planet.qgis.org  to Django 2.x and Python 
> 3. The plugins web site will also be on it’s own dedicated server now which 
> should hopefully improve responsiveness.
> 
> If you have any problems using / connecting to these servers, please do not 
> hesitate to contact myself and Dimas (in cc) to let us know.
> 
> Thank you 
> 
> Regards
> 
> Tim
> —
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Tim Sutton
> 
> Co-founder: Kartoza
> Ex Project chair: QGIS.org 
> 
> Visit http://kartoza.com  to find out about open source:
> 
> Desktop GIS programming services
> Geospatial web development
> GIS Training
> Consulting Services
> 
> Skype: timlinux 
> IRC: timlinux on #qgis at freenode.net 
> 
> I'd love to connect. Here's my calendar link  
> to make finding time easy.
> 

—









Tim Sutton

Co-founder: Kartoza
Ex Project chair: QGIS.org

Visit http://kartoza.com  to find out about open source:

Desktop GIS programming services
Geospatial web development
GIS Training
Consulting Services

Skype: timlinux 
IRC: timlinux on #qgis at freenode.net

I'd love to connect. Here's my calendar link  to 
make finding time easy.

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Re: [Qgis-user] Anyone use UK Watsonian vice counties?

[Michael . Dodd]

Someone else has suggested an updated source here:
: https://github.com/BiologicalRecordsCentre/vice-counties
Am currently checking those polygons and so far they seem ok, they note there 
was an issue with the earlier version that I had been using, so the issue may 
now be solved.

Thanks

-Original Message-
From: Jonathan Moules  
Sent: 27 January 2020 15:54
To: Michael.Dodd ; 'qgis-user@lists.osgeo.org' 

Subject: Re: [Qgis-user] Anyone use UK Watsonian vice counties?

CAUTION: This mail comes from outside the University. Please consider this 
before opening attachments, clicking links, or acting on the content.

We're possibly talking at cross purposes.

I didn't follow the NBN link on that page, but instead used the the WFS URL ( 
http://geo.vliz.be:80/geoserver/wfs ) it provides which I connected to with 
QGIS and then added the Watsonian layer.

I suggested it because it may work for your purposes where your current dataset 
does not.


On 2020-01-27 15:47, Michael.Dodd wrote:
> Unfortunately that link goes back to NBN and a page that no longer exists so 
> presumably it is the same dataset.
> Qgis gives various errors depending on the analysis but always with those 8 
> VC's, when trying 'check validity' it says there is a problem with self 
> intersection. Not sure how to fix this as it is not obvious when you zoom in 
> on the polygons.
>
> From: Jonathan Moules 
> Sent: 27 January 2020 15:41
> To: Michael.Dodd ; 
> 'qgis-user@lists.osgeo.org' 
> Subject: Re: [Qgis-user] Anyone use UK Watsonian vice counties?
>
>
> CAUTION: This mail comes from outside the University. Please consider this 
> before opening attachments, clicking links, or acting on the content.
>
> Hi Michael,
>
> There is a WFS with them in that works in QGIS:
>
> https://www.geoseer.net/rl.php?ql=f64d2064355b5bdb&p=1&q=watsonian
>
> Not tried them for analysis or exporting them, but may be worth a try.
>
> Cheers,
>
> Jonathan
>
>
> On 2020-01-27 15:12, Michael.Dodd wrote:
>
> I have downloaded the set of polygons that was digitised by NBN. Then 
> converted to wgs84 but when I try to use the polygons, 8 of them: West 
> Norfolk, Herefordshire, Montgomeryshire, Shropshire, West Ross & Cromarty, 
> Orkney, Outer Hebrides, and Zetland do not work in analysis. Qgis says there 
> is a problem with those ones but says the rest are ok.
>
>
>
> Anyone else had similar issues and/or found ways to fix these?
>
> -- 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 in relation to its secondary activity of credit broking.
>
>
>
>
>
> ___
>
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> Qgis-user@lists.osgeo.org
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Re: [Qgis-user] Anyone use UK Watsonian vice counties?

[Jonathan Moules]

Hi Michael,

There is a WFS with them in that works in QGIS:

https://www.geoseer.net/rl.php?ql=f64d2064355b5bdb&p=1&q=watsonian

Not tried them for analysis or exporting them, but may be worth a try.

Cheers,

Jonathan


On 2020-01-27 15:12, Michael.Dodd wrote:

I have downloaded the set of polygons that was digitised by NBN. Then converted to 
wgs84 but when I try to use the polygons, 8 of them: West Norfolk, Herefordshire, 
Montgomeryshire, Shropshire, West Ross & Cromarty, Orkney, Outer Hebrides, and 
Zetland do not work in analysis. Qgis says there is a problem with those ones but 
says the rest are ok.

Anyone else had similar issues and/or found ways to fix these?
-- 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 
in relation to its secondary activity of credit broking.


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Re: [Qgis-user] Anyone use UK Watsonian vice counties?

[Jonathan Moules]

We're possibly talking at cross purposes.

I didn't follow the NBN link on that page, but instead used the the WFS 
URL ( http://geo.vliz.be:80/geoserver/wfs ) it provides which I 
connected to with QGIS and then added the Watsonian layer.


I suggested it because it may work for your purposes where your current 
dataset does not.



On 2020-01-27 15:47, Michael.Dodd wrote:

Unfortunately that link goes back to NBN and a page that no longer exists so 
presumably it is the same dataset.
Qgis gives various errors depending on the analysis but always with those 8 
VC's, when trying 'check validity' it says there is a problem with self 
intersection. Not sure how to fix this as it is not obvious when you zoom in on 
the polygons.

From: Jonathan Moules 
Sent: 27 January 2020 15:41
To: Michael.Dodd ; 'qgis-user@lists.osgeo.org' 

Subject: Re: [Qgis-user] Anyone use UK Watsonian vice counties?


CAUTION: This mail comes from outside the University. Please consider this 
before opening attachments, clicking links, or acting on the content.

Hi Michael,

There is a WFS with them in that works in QGIS:

https://www.geoseer.net/rl.php?ql=f64d2064355b5bdb&p=1&q=watsonian

Not tried them for analysis or exporting them, but may be worth a try.

Cheers,

Jonathan


On 2020-01-27 15:12, Michael.Dodd wrote:

I have downloaded the set of polygons that was digitised by NBN. Then converted to 
wgs84 but when I try to use the polygons, 8 of them: West Norfolk, Herefordshire, 
Montgomeryshire, Shropshire, West Ross & Cromarty, Orkney, Outer Hebrides, and 
Zetland do not work in analysis. Qgis says there is a problem with those ones but 
says the rest are ok.



Anyone else had similar issues and/or found ways to fix these?

-- 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 
in relation to its secondary activity of credit broking.





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Re: [Qgis-user] Anyone use UK Watsonian vice counties?

[Michael . Dodd]

Unfortunately that link goes back to NBN and a page that no longer exists so 
presumably it is the same dataset.
Qgis gives various errors depending on the analysis but always with those 8 
VC's, when trying 'check validity' it says there is a problem with self 
intersection. Not sure how to fix this as it is not obvious when you zoom in on 
the polygons.

From: Jonathan Moules 
Sent: 27 January 2020 15:41
To: Michael.Dodd ; 'qgis-user@lists.osgeo.org' 

Subject: Re: [Qgis-user] Anyone use UK Watsonian vice counties?


CAUTION: This mail comes from outside the University. Please consider this 
before opening attachments, clicking links, or acting on the content.

Hi Michael,

There is a WFS with them in that works in QGIS:

https://www.geoseer.net/rl.php?ql=f64d2064355b5bdb&p=1&q=watsonian

Not tried them for analysis or exporting them, but may be worth a try.

Cheers,

Jonathan


On 2020-01-27 15:12, Michael.Dodd wrote:

I have downloaded the set of polygons that was digitised by NBN. Then converted 
to wgs84 but when I try to use the polygons, 8 of them: West Norfolk, 
Herefordshire, Montgomeryshire, Shropshire, West Ross & Cromarty, Orkney, Outer 
Hebrides, and Zetland do not work in analysis. Qgis says there is a problem 
with those ones but says the rest are ok.



Anyone else had similar issues and/or found ways to fix these?

-- 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 in relation to its secondary activity of credit broking.





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[Qgis-user] Anyone use UK Watsonian vice counties?

[Michael . Dodd]

I have downloaded the set of polygons that was digitised by NBN. Then converted 
to wgs84 but when I try to use the polygons, 8 of them: West Norfolk, 
Herefordshire, Montgomeryshire, Shropshire, West Ross & Cromarty, Orkney, Outer 
Hebrides, and Zetland do not work in analysis. Qgis says there is a problem 
with those ones but says the rest are ok.

Anyone else had similar issues and/or found ways to fix these?
-- 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 in relation to its secondary activity of credit broking.
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[Qgis-user] Migrating plugins.qgis.org to new server

[Tim Sutton]

Hi all

This is just to advise you that we will be migrating the plugins.qgis.org 
 and planet.qgis.org  web 
sites to a new server over the next hour or two. We do not expect any downtime 
of these servers during this migration but we do ask you to hold on uploading 
any new plugins until I post an update announcement indicating that the new 
server is online and fully operational.

During this migration, we will be deploying security updates and a platform 
upgrade to Django 2.x and Python 3 that was performed by Alessandro Pasotti. 
Dimas Ciptura also migrated the feed platform used for https://planet.qgis.org 
 to Django 2.x and Python 3. The plugins web site 
will also be on it’s own dedicated server now which should hopefully improve 
responsiveness.

If you have any problems using / connecting to these servers, please do not 
hesitate to contact myself and Dimas (in cc) to let us know.

Thank you 

Regards

Tim
—









Tim Sutton

Co-founder: Kartoza
Ex Project chair: QGIS.org

Visit http://kartoza.com  to find out about open source:

Desktop GIS programming services
Geospatial web development
GIS Training
Consulting Services

Skype: timlinux 
IRC: timlinux on #qgis at freenode.net

I'd love to connect. Here's my calendar link  to 
make finding time easy.

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[Qgis-user] MemoryLayerSaver plugin - Is there a way to recover data?

[Julien K.]

Dear QGis users,

I have a *mldata file generated by MemoryLayerSaver plugin that won't be
read when opening the associated QGis project.I tried with 3.4.15-LTR,
3.10.2 rel-dev and dev with no luck, in the QGis project the layers'
structure is shown but the tables are empty.

The plugin's source code indicates *mldata files are QStreamData, I don't
want to dive into Python/Qt programing at the moment, so is there a simple
way to recover the data?

Besides is this a bug or a known problem (i.e. "you've been warned, you
should save your memory layers as soon as possible")? Should I file a bug
report?

Regards,
Julien
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