[Qgis-user] QGIS User Conference 2024: Detailed schedule

[Martin Dobias via QGIS-User]

Hi all

Good news everyone - the detailed schedule is now available on the
conference website:
https://uc2024.qgis.sk/schedule/details/

We are expecting 50 talks and 15 workshops over the two days. For those
looking for a small escape from the conference buzz, there will be a large
"focus" / "quiet" room at the library right next to the conference rooms.
And after the first day of the conference, there will be a social event
with food and drinks.

A quick reminder: early bird tickets are available only until the end of
June - only two weeks left!

Those who plan to join the contributor meeting, please do not forget to add
your name to the list of participants on the wiki:
https://github.com/qgis/QGIS/wiki/27th%E2%80%90Contributor%E2%80%90Meeting%E2%80%90in%E2%80%90Bratislava

See you in Bratislava!

Regards
Martin (on behalf of the local organizing committee)
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[Qgis-user] QGIS User Conference 2024 - registration open

[Martin Dobias via QGIS-User]

Hi all

Just a quick note that tickets for this year's User Conference are now
available!

You can get your ticket on the web site of the conference:
https://uc2024.qgis.sk/

There are two newly added pages on the site:
- tentative schedule - https://uc2024.qgis.sk/schedule/
- practical info when attending - https://uc2024.qgis.sk/attending/

We are now in the process of going through the submitted talks and
workshops - there are over 80 proposals! We would like to publish the
program sometime in May. Most likely we will be running talks in three
rooms in parallel, plus workshops in three more rooms.

See you in Bratislava!

Regards
Martin (on behalf of the local organizing committee)
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[Qgis-user] QGIS User Conference - call for papers ends soon

[Martin Dobias via QGIS-User]

Hi everyone!

Just a friendly reminder that call for papers (talks/workshops) for this
year's QGIS User Conference will be closing 31st of March, so if you plan
to submit a proposal, there are only few days left!

Conference website: https://uc2024.qgis.sk/

Submission of proposals: https://talks.osgeo.org/qgis-uc2024/cfp

Looking forward to seeing many of you in Bratislava!

Regards
Martin
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[Qgis-user] QGIS User Conference: Call for papers + Call for sponsors

[Martin Dobias via QGIS-User]

Hi everyone!

This is a quick note that call for papers for QGIS User Conference
2024 is now open - deadline for submissions is 31 March 2024. See more
details on the web site:
https://uc2024.qgis.sk/call-for-papers/

We have also started call for sponsors, with sponsorship opportunities
at various levels. More details here:
https://uc2024.qgis.sk/sponsors/

Please help us spread the word and share the links in your networks - thanks!

Regards
Martin
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[Qgis-user] QGIS User Conference 2024 & Contributor Meeting

[Martin Dobias via QGIS-User]

Join us for the biggest QGIS event of the year!

QGIS User Conference 2024 site is up: https://uc2024.qgis.sk/

We are happy to announce that the QGIS User Conference will take place 9-10
September 2024 in Bratislava, Slovakia! The conference will take place at
the Faculty of Civil Engineering at Slovak Technical University. The
contributor meeting will follow on 11-13 September at the same venue.

The event is being organized by the Slovak QGIS user group in collaboration
with the Faculty of Civil Engineering STU, with support from the QGIS core
project.

About the User Conference:

The QGIS User Conference is the premier event for QGIS users and
developers. It is a great opportunity to learn about the latest features
and developments in QGIS, network with other users, and share your
knowledge.

Registration & Call for Papers will be announced in the coming weeks.

About the Contributor Meeting:

QGIS Contributors Meetings are volunteer-driven events where contributors
to the QGIS project from around the world get together in a common space.
During these events, contributors to the QGIS project take the opportunity
to plan their work, hold face-to-face discussions and present new
improvements to the QGIS project that they have been working on. Everybody
attending the event donates their time to the project for the days of the
event.

Registration for the Contributor Meeting is available on GitHub:

https://github.com/qgis/QGIS/wiki/27th%E2%80%90Contributor%E2%80%90Meeting%E2%80%90in%E2%80%90Bratislava

Stay tuned for more news and we hope to see you there!

If you have any questions, please feel free to reach out to uc2...@qgis.sk

Regards

Slovak QGIS User Group
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[Qgis-user] Výškový profil z lidarových dat pro ČR

[Martin Sluka via QGIS-User]

Zkouším udělat výškový profil z lidarových dat pro ČR a evidentně dělám něco 
špatně, protože žádný profil se negeneruje.

1. nová WMS vrstva
2. URL https://ags.cuzk.cz/arcgis2/services/dmr5g/ImageServer/WMSServer? 
<https://ags.cuzk.cz/arcgis2/services/dmr5g/ImageServer/WMSServer?>
3. grey shaded
4. Profile Tool

A nic. rovná čára

Kde dělám chybu?

Děkuji

Martin








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Re: [Qgis-user] Shifting a Geotiff image

[Martin Weis via QGIS-User]

Dear Perth,

On 11/08/2023 09:14, Grant Boxer via QGIS-User wrote:

I have a GeoTIFF image created using Web ODM and is mis-aligned by 1 to 1.5
m and I would like to move the image to register with the surveyed ground
control points. I can see vector tools to do this, but no raster tools.
Anyone have any suggestions.



If it just a bit off, then the plugin "Freehand raster georeferencer"
can be quick to shift it, otherwise use georeferencer from core (Layer -
georeferencer), which is especially more flexible and the right tool if
you have GCPs that you can use.
Be careful, sometimes crashes can occur with certain transformation
types, so better save beforehand (autoSaver and MemoryLayerSaver are
your friends).


Image created in WGS84 z51S.


Sound like UTM (good, metric CRS), though WGS84 might be geographic CRS
(worse, pixel size undefined/different in x,y).

Cheers
Martin



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[Qgis-user] problem with GRASS custom variables

[Martin Landa via QGIS-User]

Dear QGIS users,

I have problem setting up custom GRASS-related variables in QGIS settings
(use custom variables):

[image: image.png]
Unfortunately after restarting QGIS the statement below in Python Console

from grass.pygrass.gis import Mapset

fails with

ImportError: Could not load grass_raster.8.4.

When I set the same environmental variables before starting QGIS from shell
than the pyGRASS statement *works*:

GISBASE=/home/martin/src/grass/dist.x86_64-pc-linux-gnu
PYTHONPATH=/home/martin/src/grass/dist.x86_64-pc-linux-gnu/etc/python
LD_LIBRARY_PATH=/home/martin/src/grass/dist.x86_64-pc-linux-gnu/lib qgis

Any idea why custom variables defined by QGIS settings fail in this case?
Why are they behaving differently from environmental variables defined in
the shell?

Thanks in advance, Martin

-- 
Martin Landa
http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa
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Re: [Qgis-user] Non-standard map layout ("projection")

[Martin Weis via QGIS-User]

Hello Lester,


On 19/04/2023 08:49, Lester Anderson via QGIS-User wrote:> A quick
question. Is it possible to project or convert vector data into:> (1)
Dymaxion (Fuller Projection)> (2) Watermans Butterfly Projection> (3)
Peirce Quincuncial Projection
Hormann held a (german) talk and implemented (3) a while ago:
https://youtu.be/_i7j2fCeLe8?t=1378

Martin
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[Qgis-user] Cannot locate exercise_data folder but it exists

[Martin Kind via QGIS-User]

The title says it. Am I doing something wrong? Where is the folder supposed to 
be located?
Can someone please provide an example of how they got it running? With their 
respective location.
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Re: [Qgis-user] OTB Plugin Activation

[Martin Bittens via Qgis-user]

Hello Nicolas,

thanks a lot for your advice. The OTB-plugin is working now. I must
admit that I made a mistake when I tried entering the path to the OTB
binaries. I clicked directly on the respective OTB fields in the
processing --> settings --> OTB tab (e.g., 'OTB application folder'). As
I wrote nothing happened then. But I had to move the cursor in the white
space beside the fields and double click there. Then a menu opened where
I could enter/select the correct OTB paths

Again, many thanks


Martin




Am 3/12/2022 um 2:10 PM schrieb Nicolas Cadieux:


Hi,

I am currently with QGIS 3.22.2. my version of the OrfeoToolbox
provider is 2.12.99. Under Processing Toolbox/options/providers/OTB, I
see OTB application folder. It is set to
C:/OTB-7.4.0-Win64/lib/otb/applications.  OTB folder is set to
C:/OTB-7.4.0-Win64.  If you don't have the right folders, it will not
work.  I see no "activate box".  Set the folder then click ok. Close
the Option panel and reopen it to make sure the setting have been
accepted.   If the first folder was the most complicated to set correctly.

Nicolas

On 2022-03-12 8:12 a.m., martin.bitt...@gmx.de wrote:

The OTB settings are not accessable. I can see the fields but when I
clicked on it nothing happened.

Regards

Martin

Am 12.03.2022 1:20 AM schrieb Nicolas Cadieux
:

Hi,

Y did you indicate the directory paths for the binaries in the
processing options?
Nicolas Cadieux
https://gitlab.com/njacadieux

Le 11 mars 2022 à 09:52, Martin Bittens via Qgis-user
 a écrit :

Hello QGIS Users,

I am running QGIS 3.22.4 and 3.24.0 and I tried to activate
the OTB
plugin processing the following steps:

1. Downloading the Orfeo Toolbox (version 7.4.0) as zip file;

2. Unpacking the zip file;

3. Opening QGIS;

4. Checking in the plug in manager if the Orfeo Toolbox
Provider is
enabled (it was);

5. Opening the Options --> Processing --> Providers --> OTB

But there the "Activate' checkbox  did not appear.


Does anybody know is going wrong?

Many thanks for your help.


    Regards


Martin



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--
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https://gitlab.com/njacadieux


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[Qgis-user] OTB Plugin Activation

[Martin Bittens via Qgis-user]

Hello QGIS Users,

I am running QGIS 3.22.4 and 3.24.0 and I tried to activate the OTB
plugin processing the following steps:

1. Downloading the Orfeo Toolbox (version 7.4.0) as zip file;

2. Unpacking the zip file;

3. Opening QGIS;

4. Checking in the plug in manager if the Orfeo Toolbox Provider is
enabled (it was);

5. Opening the Options --> Processing --> Providers --> OTB

But there the "Activate' checkbox  did not appear.


Does anybody know is going wrong?

Many thanks for your help.


Regards


Martin



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Re: [Qgis-user] QGIS 3.22 - GRASS Init-Error

[Martin Bittens]

Hello Allister,

I just installed the latest nightly version of QGIS 3.22 (which is
3.22.0.76) using the OSGEO4W installer. This version is working with the
GRASS 7 plugin and the GRASS 7 algorithms.


Regards


Martin



Am 11/10/2021 um 8:40 AM schrieb Martin Bittens:


Hello Alister,

in the meantime I did an update on a second computer from QGIS 3.20.3
to QGIS 3.22.0, and from QGIS 3.16.11 to 3.16.13 using the OSGEO4W
installer. The result is:

QGIS 3.22.0 displays the GRASS init error, the GRASS 7 plugin cannot
be used, the GRASS processing algorithms are working.

QGIS 3.16.13 is working without any problems. Both, the GRASS 7 plugin
and the GRASS processing algorithms can be used.


As far as I understood the GRASS 7 plugin in QGIS 3.22 'want to see' a
GRASS version which is not installed whereas the GRASS 7 plugin which
came with QGIS 3.16.13 is satisfied with the installed GRASS version.
But I do not have any idea how telling the GRASS 7 plugin of QGIS 3.22
that it should take what is installed.


Regards


Martin



Am 11/10/2021 um 7:43 AM schrieb Alister Hood:


Date: Mon, 8 Nov 2021 22:31:30 -0300
From: Martin Bittens 
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] QGIS 3.22 - GRASS Init-Error
Message-ID: <8f3b2b78-bfc8-1040-bf42-873b8ec46...@gmx.de>
Content-Type: text/plain; charset=UTF-8; format=flowed

Hello QGIS User Group!

Today I did the update from QGIS 3.20 to 3.22 using the Win10 64bit?
installer 'osgeo4w-setup.exe' provided on the QGIS homepage. When I
opened the new QGIS version I received the following warning:

 ?GRASS init error : Problem in GRASS initialization, GRASS
provider and
plugin will not work : Module built against version
2021-10-11T09:56:15+00:00 but trying to use version
2021-11-01T10:26:16+00:00. You need to rebuild GRASS GIS or untangle
multiple installations.

Obviously, something does not fit. But what?

Are there any ideas? I also did the update from 3.16.11 to
3.16.13 (the
LTR versions) and did not this problem...


Thank you


Martin


I installed 3.22 today using the standalone Windows installer, not
the OSGEO4W installer, and I got the same error on startup.
Both the Grass Plugin and Provider show in the plugin manager as
loaded, but I haven't tried using them to confirm it is truly broken.
I note that the Grass processing algorithms do still work.

Regards,
Alister

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Re: [Qgis-user] QGIS 3.22 - GRASS Init-Error

[Martin Bittens]

Hello Alister,

in the meantime I did an update on a second computer from QGIS 3.20.3 to
QGIS 3.22.0, and from QGIS 3.16.11 to 3.16.13 using the OSGEO4W
installer. The result is:

QGIS 3.22.0 displays the GRASS init error, the GRASS 7 plugin cannot be
used, the GRASS processing algorithms are working.

QGIS 3.16.13 is working without any problems. Both, the GRASS 7 plugin
and the GRASS processing algorithms can be used.


As far as I understood the GRASS 7 plugin in QGIS 3.22 'want to see' a
GRASS version which is not installed whereas the GRASS 7 plugin which
came with QGIS 3.16.13 is satisfied with the installed GRASS version.
But I do not have any idea how telling the GRASS 7 plugin of QGIS 3.22
that it should take what is installed.


Regards


Martin



Am 11/10/2021 um 7:43 AM schrieb Alister Hood:


Date: Mon, 8 Nov 2021 22:31:30 -0300
From: Martin Bittens 
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] QGIS 3.22 - GRASS Init-Error
Message-ID: <8f3b2b78-bfc8-1040-bf42-873b8ec46...@gmx.de>
Content-Type: text/plain; charset=UTF-8; format=flowed

Hello QGIS User Group!

Today I did the update from QGIS 3.20 to 3.22 using the Win10 64bit?
installer 'osgeo4w-setup.exe' provided on the QGIS homepage. When I
opened the new QGIS version I received the following warning:

 ?GRASS init error : Problem in GRASS initialization, GRASS
provider and
plugin will not work : Module built against version
2021-10-11T09:56:15+00:00 but trying to use version
2021-11-01T10:26:16+00:00. You need to rebuild GRASS GIS or untangle
multiple installations.

Obviously, something does not fit. But what?

Are there any ideas? I also did the update from 3.16.11 to 3.16.13
(the
LTR versions) and did not this problem...


Thank you


Martin


I installed 3.22 today using the standalone Windows installer, not the
OSGEO4W installer, and I got the same error on startup.
Both the Grass Plugin and Provider show in the plugin manager as
loaded, but I haven't tried using them to confirm it is truly broken.
I note that the Grass processing algorithms do still work.

Regards,
Alister

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Re: [Qgis-user] QGIS 3.22 - GRASS Init-Error

[Martin Bittens]

Hello Andrea,

thanks a lot for your fast response.

1.) Package information

I took the version numbers from the' QGIS --> Help --> about window and
from the plugin manager.

Here are the package information from the network installer:

GRASS GIS: 7.8.6-6;

GRASS plugin for QGIS: 3.22.0-4

GRASS plugin for QGIS (long term release): 3.16.13-1

QGIS Desktop (long term release): 3.16.3-1

QGIS Desktop: 3.22.0-4


2.) Installation

I came from QGIS 3.20 (in this versions I did not receive the mentioned
error message, the GRASS plugin was working well) and did the update
without creating a new directory. The fresh install I did when I made
the upgrade from QGIS 3.18 to 3.20.


Regards


Martin



Am 11/9/2021 um 8:42 AM schrieb Andrea Giudiceandrea:

Martin Bittens Tue, 09 Nov 2021 02:49:40 -0800

qgis-ltr-plugin: 2.0;

qgis-grass-plugin packages: GRASS 7, version 2.0 and GRASS GIS provider,
version 2.12.99.


Hi Martin,
these version numbers are really strange.

I'm referring to the version numbers of the packages that you will see
in the OSGeo4W Network Installer you used to update QGIS.
Those version numbers are in the form of qgis 3.22.0-4, qgis-ltr
qgis-ltr 3.16.13-1, ...

Could you please check again?

Anyway, are you sure you are not mixing packages from old v1 OSGeo4W
repository and new v2 OSGeo4W repository as stated in the QGIS Web site:
"CAUTION: Upgrades of old setups using the new repository are not
supported. You need to do a fresh install or use a different directory."

Regards.

Andrea


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Re: [Qgis-user] QGIS 3.22 - GRASS Init-Error

[Martin Bittens]

Hello Andrea,

I installed the following versions:

qgis: 3.22.0-Bialowieza

qgis-ltr: 3.16.13-Hannover;

qgis-ltr-plugin: 2.0;

qgis-grass-plugin packages: GRASS 7, version 2.0 and GRASS GIS provider,
version 2.12.99.

grass: 7.8.6 (64bit), build date: 2021-11-01.


Regards


Martin



Am 11/9/2021 um 7:38 AM schrieb Andrea Giudiceandrea:

Martin Bittens Mon, 08 Nov 2021 17:31:52 -0800

Today I did the update from QGIS 3.20 to 3.22 using the Win10 64bit
installer 'osgeo4w-setup.exe' provided on the QGIS homepage. When I
opened the new QGIS version I received the following warning:

 GRASS init error : Problem in GRASS initialization, GRASS provider and
plugin will not work : Module built against version
2021-10-11T09:56:15+00:00 but trying to use version
2021-11-01T10:26:16+00:00. You need to rebuild GRASS GIS or untangle
multiple installations.


Hi Martin,
what are the installed version of the qgis, qgis-ltr, grass,
qgis-ltr-grass-plugin, qgis-grass-plugin packages?

Best regards.

Andrea Giudiceandrea


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[Qgis-user] QGIS 3.22 - GRASS Init-Error

[Martin Bittens]

Hello QGIS User Group!

Today I did the update from QGIS 3.20 to 3.22 using the Win10 64bit 
installer 'osgeo4w-setup.exe' provided on the QGIS homepage. When I
opened the new QGIS version I received the following warning:

 GRASS init error : Problem in GRASS initialization, GRASS provider and
plugin will not work : Module built against version
2021-10-11T09:56:15+00:00 but trying to use version
2021-11-01T10:26:16+00:00. You need to rebuild GRASS GIS or untangle
multiple installations.

Obviously, something does not fit. But what?

Are there any ideas? I also did the update from 3.16.11 to 3.16.13 (the
LTR versions) and did not this problem.


Thank you


Martin



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Re: [Qgis-user] QGIS 3.20 Crash

[Martin Bittens]

Great. Thanks a lot.


Martin


Am 10/6/2021 um 11:12 AM schrieb Stefan Giese (WhereGroup):


first go to Menu->Settings->User Profiles->open active profile folder

then go one folder up...you will see all the profiles. The profile.ini
shows your default profile which you can change

a profile folder looks like this one:

now you can copy things from one folder to the other...at the moment I
don't know a better way. We are working on a Profile manager plugin to
make this easier, which should be ready soon

Am 06.10.2021 um 16:05 schrieb Martin Bittens:


Yes, it worked. Using the new profile QGIS did not crash. But...

1.) How do I get all my settings and plug-ins from the previous
profile into the new one?

2.) How do I get QGIS running always with the new profile when I
start-up?  Do I need to delete the old profile?


Regards


Martin


Am 10/6/2021 um 10:36 AM schrieb Stefan Giese (WhereGroup):


Did you try it also with a new profile?

Just make a new prrofile and test it again: Menu->Settings->User
Profiles->New Profile

If QGIS don't chrashes again, then your user profile is corrupt...

Am 06.10.2021 um 15:28 schrieb Martin Bittens:


Hello QGIS users.

Since a couple of days QGIS 3.20 crashes when I am closing the
program. The following crash report appears:


Crash ID: 2bba35ac54ec3f66db08369439704d5a7beb5523
<https://github.com/qgis/QGIS/search?q=2bba35ac54ec3f66db08369439704d5a7beb5523=Issues>


Stack Trace

GDALDestroyDriver : dal::GDALRasterDriver::deregisterGDALDrivers :
dal::Client::~Client : calc::DataStorageId::setId : ::operator() :
__crt_seh_guarded_call::operator(), &, > : execute_onexit_table :
calc::vs2CsfVs : calc::vs2CsfVs : LdrpCallInitRoutine :
LdrShutdownProcess : RtlExitUserProcess : ExitProcessImplementation
: exit_or_terminate_process : common_exit : BaseThreadInitThunk :
RtlUserThreadStart :




QGIS Info
QGIS Version: 3.20.3-Odense
QGIS code revision: 495fbaec
Compiled against Qt: 5.15.2
Running against Qt: 5.15.2
Compiled against GDAL: 3.3.1
Running against GDAL: 3.3.1



System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19043



Any idea what is going wrong?


Regards


Martin




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Re: [Qgis-user] QGIS 3.20 Crash

[Martin Bittens]

Yes, it worked. Using the new profile QGIS did not crash. But...

1.) How do I get all my settings and plug-ins from the previous profile
into the new one?

2.) How do I get QGIS running always with the new profile when I
start-up?  Do I need to delete the old profile?


Regards


Martin


Am 10/6/2021 um 10:36 AM schrieb Stefan Giese (WhereGroup):


Did you try it also with a new profile?

Just make a new prrofile and test it again: Menu->Settings->User
Profiles->New Profile

If QGIS don't chrashes again, then your user profile is corrupt...

Am 06.10.2021 um 15:28 schrieb Martin Bittens:


Hello QGIS users.

Since a couple of days QGIS 3.20 crashes when I am closing the
program. The following crash report appears:


Crash ID: 2bba35ac54ec3f66db08369439704d5a7beb5523
<https://github.com/qgis/QGIS/search?q=2bba35ac54ec3f66db08369439704d5a7beb5523=Issues>


Stack Trace

GDALDestroyDriver : dal::GDALRasterDriver::deregisterGDALDrivers :
dal::Client::~Client : calc::DataStorageId::setId : ::operator() :
__crt_seh_guarded_call::operator(), &, > : execute_onexit_table :
calc::vs2CsfVs : calc::vs2CsfVs : LdrpCallInitRoutine :
LdrShutdownProcess : RtlExitUserProcess : ExitProcessImplementation :
exit_or_terminate_process : common_exit : BaseThreadInitThunk :
RtlUserThreadStart :




QGIS Info
QGIS Version: 3.20.3-Odense
QGIS code revision: 495fbaec
Compiled against Qt: 5.15.2
Running against Qt: 5.15.2
Compiled against GDAL: 3.3.1
Running against GDAL: 3.3.1



System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19043



Any idea what is going wrong?


Regards


Martin




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[Qgis-user] QGIS 3.20 Crash

[Martin Bittens]

Hello QGIS users.

Since a couple of days QGIS 3.20 crashes when I am closing the program.
The following crash report appears:


Crash ID: 2bba35ac54ec3f66db08369439704d5a7beb5523
<https://github.com/qgis/QGIS/search?q=2bba35ac54ec3f66db08369439704d5a7beb5523=Issues>


Stack Trace

GDALDestroyDriver : dal::GDALRasterDriver::deregisterGDALDrivers :
dal::Client::~Client : calc::DataStorageId::setId : ::operator() :
__crt_seh_guarded_call::operator(), &, > : execute_onexit_table :
calc::vs2CsfVs : calc::vs2CsfVs : LdrpCallInitRoutine :
LdrShutdownProcess : RtlExitUserProcess : ExitProcessImplementation :
exit_or_terminate_process : common_exit : BaseThreadInitThunk :
RtlUserThreadStart :




QGIS Info
QGIS Version: 3.20.3-Odense
QGIS code revision: 495fbaec
Compiled against Qt: 5.15.2
Running against Qt: 5.15.2
Compiled against GDAL: 3.3.1
Running against GDAL: 3.3.1



System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19043



Any idea what is going wrong?


Regards


Martin





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Re: [Qgis-user] Raster Layer Symbology Problem

[Martin Bittens]

Hello Sebastian,

thank you for your response. Yes indeed, for me the coloring style you
showed would be an option. This style is what I get in GRASS GIS as
well. But,

what I would prefer in QGIS is this (as provided by QGIS 3.16.4 LTR):


So I hope that in future QGIS versions, the user will have the choice
between the different display options. As far as I understood the
discussions in the links you sent there is something going on in order
to add an option for selecting the new  or the old display style.
Unfortunately, I am not an expert in that programming stuff and
therefore I don't know how to apply what there is explained. I will wait
and see what the next QGIS versions offer for displaying raster gradient
legends. And I will keep the QGIS 3.16.4 LTR with special care not
loosing the display style I showed above.


Regards


Martin


Am 3/10/2021 um 5:54 PM schrieb Sebastian Gutwein:

Martin,
I agree with your assessment.
I assume the assumption of the designers (thank you Nyall Dawson et al
for all of your amazing work) was that if you were displaying a
continuous raster you would want a continuous legend as well.
As shown by your issue and in the links I shared with you the reality
is that this doesn't fit all use cases.
I am considering writing up a feature request to address those issues.
Unless you want to?
To help me understand your use case more would a legend that was
continuous but had numerical values at each "break" work for you? An
example of this is in this tutorial
https://www.ecodiv.earth/post/legend-for-continuous-raster-in-qgis-composer/
<https://www.ecodiv.earth/post/legend-for-continuous-raster-in-qgis-composer/>
image.png

-Bas

On Wed, Mar 10, 2021 at 2:34 PM Martin Bittens mailto:martin.bitt...@gmx.de>> wrote:

Sebastian, Bernd,

thanks a lot for your response. I checked the links Sebastian
sent. As far as I could see displaying data in the legend as a
continuum is a new feature in QGIS 3.18 which replaced the
previous method displaying data in the legend as categories (as
QGIS 3.16.4 is still doing - fortunately. Otherwise it would be
difficult producing maps in ongoing projects in a consistent
layout). And obviously there is no option available switching
between the old and the new display method. Personally I think it
was not a good decision giving up completely the categorical
display in the legend. In particular if you would work with
multiple colors and a large range of values, there is no way to
allocate map colors to the corresponding values, or vice versa.

So, I hope that the next QGIS version will include an option which
allows selecting the method how to  display the data, as continuum
or categorized.


    Regards

Martin


Am 3/9/2021 um 4:18 PM schrieb Sebastian Gutwein:

Martin,
I think this may be the result of the new feature

https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends

<https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends>
Which is exciting for me becasue that is how I would like to have
my continious data display. But it sounds like that is not what
you are interested in. I have not tried 3.18 myself so don't know
if there is a workaround.
It does look like there are some links to discussions in the
comments of this stack exchange question.

gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends

<http://gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends>

gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16

<http://gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16>
twitter.com/ThomasG77/status/1365255399927140355
<http://twitter.com/ThomasG77/status/1365255399927140355>


On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang
mailto:bernd.vogelges...@gmx.de>> wrote:

Without testing I would say it's a bug. Quite some bugs went
into 3.18
unnoticed and unfortunately, it's not  communicated on the
landing page.
Next regular point release will be in 10 days, but for urgent
stuff, you
should better use 3.16.


On 09.03.21 13:32, Martin Bittens wrot:
> Hello QGIS User List, i
>
> I already sent this message but it was not posted, so it is
here again.
> Hopefully it works now.
>
>
> I am still struggling with the problem creating a legend
for a raster
> layer. Usually I am working with the following settings in
order to
> colorize a calculated raster layer (e.g. after applying
v.surf.idw on a
> point data set):
>
&

Re: [Qgis-user] Raster Layer Symbology Problem

[Martin Bittens]

Sebastian, Bernd,

thanks a lot for your response. I checked the links Sebastian sent. As
far as I could see displaying data in the legend as a continuum is a new
feature in QGIS 3.18 which replaced the previous method displaying data
in the legend as categories (as QGIS 3.16.4 is still doing -
fortunately. Otherwise it would be difficult producing maps in ongoing
projects in a consistent layout). And obviously there is no option
available switching between the old and the new display method.
Personally I think it was not a good decision giving up completely the
categorical display in the legend. In particular if you would work with
multiple colors and a large range of values, there is no way to allocate
map colors to the corresponding values, or vice versa.

So, I hope that the next QGIS version will include an option which
allows selecting the method how to  display the data, as continuum or
categorized.


Regards

Martin


Am 3/9/2021 um 4:18 PM schrieb Sebastian Gutwein:

Martin,
I think this may be the result of the new feature
https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends
<https://qgis.org/en/site/forusers/visualchangelog318/#feature-gradient-ramp-based-legends>
Which is exciting for me becasue that is how I would like to have my
continious data display. But it sounds like that is not what you are
interested in. I have not tried 3.18 myself so don't know if there is
a workaround.
It does look like there are some links to discussions in the comments
of this stack exchange question.
gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends
<http://gis.stackexchange.com/questions/388843/qgis-3-18-override-raster-gradient-legends>
gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16
<http://gis.stackexchange.com/questions/388154/how-to-get-back-discrete-raster-legend-symbols-in-qgis-3-16>
twitter.com/ThomasG77/status/1365255399927140355
<http://twitter.com/ThomasG77/status/1365255399927140355>


On Tue, Mar 9, 2021 at 7:54 AM Bernd Vogelgesang
mailto:bernd.vogelges...@gmx.de>> wrote:

Without testing I would say it's a bug. Quite some bugs went into 3.18
unnoticed and unfortunately, it's not  communicated on the landing
page.
Next regular point release will be in 10 days, but for urgent
stuff, you
should better use 3.16.


On 09.03.21 13:32, Martin Bittens wrot:
> Hello QGIS User List, i
>
> I already sent this message but it was not posted, so it is here
again.
> Hopefully it works now.
>
>
> I am still struggling with the problem creating a legend for a
raster
> layer. Usually I am working with the following settings in order to
> colorize a calculated raster layer (e.g. after applying
v.surf.idw on a
> point data set):
>
> - rendering type: singleband pseudocolor
>
> - interpolation: linear
>
> - mode: equal interval
>
>
> In QGIS 3.18.0:
>
> Selecting an appropriate color ramp and applying a
classification in,
> e.g., 5 classes, I see in the "Layer Properties - Symbology"
window the
> 5 colored classes separately and the corresponding 5 values (in
my case
> temperatures) for each color coding. But in the "Layer Panel"
the legend
> shows the color coding as a continuum and only the first and
last value
> of the value range appears. The same thing happens in the layout
manager
> when I create a layout for printing which includes a legend.
>
> In QGIS 3.16.4 LTR and previous versions:
>
> Doing the same I get the 5 color classes separately and the
> corresponding values for each of the 5 classes in the "Legend
Panel"as
> well as in the layout manger.
>
>
> My question: Is this a bug in the new QGIS version or does QGIS
3.18 not
> provide this functionality anymore?
>
>
> Thanks a lot for a comment.
>
>
> Regards
>
>
> Martin
>
>
>
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[Qgis-user] Raster Layer Symbology Problem

[Martin Bittens]

Hello QGIS User List,

I already sent this message but it was not posted, so it is here again.
Hopefully it works now.


I am still struggling with the problem creating a legend for a raster
layer. Usually I am working with the following settings in order to
colorize a calculated raster layer (e.g. after applying v.surf.idw on a
point data set):

- rendering type: singleband pseudocolor

- interpolation: linear

- mode: equal interval


In QGIS 3.18.0:

Selecting an appropriate color ramp and applying a classification in,
e.g., 5 classes, I see in the "Layer Properties - Symbology" window the
5 colored classes separately and the corresponding 5 values (in my case
temperatures) for each color coding. But in the "Layer Panel" the legend
shows the color coding as a continuum and only the first and last value
of the value range appears. The same thing happens in the layout manager
when I create a layout for printing which includes a legend.

In QGIS 3.16.4 LTR and previous versions:

Doing the same I get the 5 color classes separately and the
corresponding values for each of the 5 classes in the "Legend Panel"as
well as in the layout manger.


My question: Is this a bug in the new QGIS version or does QGIS 3.18 not
provide this functionality anymore?


Thanks a lot for a comment.


Regards


Martin



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[Qgis-user] Layer Properties - Symbology

[Martin Bittens]

Hello QGIS Users,

I just got some problems creating a legend for a raster layer. Usually I
am working with the following settings in order to colorize a calculated
raster layer (e.g. after applying v.surf.idw on a point data set):

- rendering type: singleband pseudocolor

- interpolation: linear

- mode: equal interval


In QGIS 3.18.0:

Selecting an appropriate color ramp and applying a classification, e.g.,
5 classes, I can see in the "Layer Properties - Symbology" window the 5
classes with color labels and the corresponding 5 values for each class.
But in the "Layer Panel" the legend shows only the first and last value
of the value range. The same thing happens in the layout manager when I
create a layout for printing which includes a legend.

In QGIS 3.16.4 LTR and previous versions:

Doing the same I get the 5 color classes with the corresponding values
for each of the 5 classes in the "Legend Panel"as well as in the layout
manger.

In my first attempt submitting this message to the QGIS user list I
attached 2 screenshots depicting the problem. But the files were too big
and the list moderator didn't  approve. I hope the problem description
only by words is sufficient.

My question: Is this a bug in the new QGIS version or does QGIS 3.18 not
provide this functionality anymore?


Thanks a lot for a comment.


Regards


Martin


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Re: [Qgis-user] Lidar download

[Martin Dobias]

Hi

On Fri, Mar 5, 2021 at 3:13 AM Nicolas Cadieux 
wrote:

>  LiDAR is new in QGIS and i’am not sure what files formats are supported
> yet.  I had trouble with the current version.  It did show support for a
> json file format but I expect the las/laz format support will pop up once
> the bugs are worked out.  In the mean while, I would use CloudCompare
> (OpenSource) to read the cloud and create the DEM.  Then, you could import
> the DEM into QGIS to extract the contour lines.
>

QGIS 3.18 does support LAS/LAZ format to load point cloud datasets. The
problem is that some installers for some platforms (most notably the
Windows installer) do not include the PDAL library needed to read LAS/LAZ
files. There is now an experimental alternative installer which includes
also PDAL library and thus it can read LAS/LAZ files too:
https://qgis.org/downloads/QGIS-OSGeo4W-3.18.0-1.msi

Please note that 3.18.0 release has been pulled back few days ago because
of several major bugs, so please consider this as a testing release where
some things may not work.

Regards
Martin
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Re: [Qgis-user] QGIS 3.18/3.16.4 LTR

[Martin Bittens]

Hello Jürgen,

Oh yes, now I got it!

Thanks a lot for your rapid response

Regards

Martin



Am 2/25/2021 um 9:08 AM schrieb Jürgen E. Fischer:

Hi Martin,

On Thu, 25. Feb 2021 at 08:32:39 -0300, Martin Bittens wrote:

I just read the messages about  the latest release of the QGIS 3.18.0
and QGIS 3.16.4 (LTR) packages and must admit that now I am a bit
confused. A couple of days ago I already made an update of my existing
QGIS installation (3.10 and 3.14) using the  network installer
osgeo4w-setup-x86_64.exe which I downloaded from the QGIS homepage. As
usual I selected 'Advanced Installation', the update run without any
problems, and at the end I got the updated QGIS versions 3.18.0 and
3.16.4. But now I read this (e.g.):

Read the two paragraph in front of that: "the new packages are still in a
separate repository for testing" and "You can install them using the osgeo4w
installer on http://download.osgeo.org/osgeo4w/testing/osgeo4w-setup.exe;.
As you neither did use the testing installer nor the repo, the rest doesn't
apply to you.


Jürgen



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[Qgis-user] QGIS 3.18/3.16.4 LTR

[Martin Bittens]

Hello QGIS users,

I just read the messages about  the latest release of the QGIS 3.18.0
and QGIS 3.16.4 (LTR) packages and must admit that now I am a bit
confused. A couple of days ago I already made an update of my existing
QGIS installation (3.10 and 3.14) using the  network installer
osgeo4w-setup-x86_64.exe which I downloaded from the QGIS homepage. As
usual I selected 'Advanced Installation', the update run without any
problems, and at the end I got the updated QGIS versions 3.18.0 and
3.16.4. But now I read this (e.g.):

Long story short: you cannot upgrade from old installs and have to remove and
reinstall or use a separate directory.  As the new OSGeo4W only supports 64bit
the default root directory was changed to C:\OSGeo4W, which might help with
that if you were on 64bit earlier.

Also note that it now only has one version of Python - namely 3.9, which
doesn't support Windows 7 anymore.  Other updates include Qt 5.15, GDAL 3.2,
PROJ 7.2 and SAGA 7.8.


What does it mean,

- you cannot upgrade from old installs (I did it with success as far I
could see. My QGIS-projects set-up with older QGIS versions are running
obviously without any problems.

- it now only has one version of Python - namely 3.9 (I checked my QGIS
installation, there is no Python 3.9).

- Other updates include ...  SAGA 7.8 (in the package list I could only
see SAGA 2.3.2 LTR and SAGA 2.1.2.)


It would be great if somebody can explain what these messages like
mentioned above are about.

Thank you very much.


Martin





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Re: [Qgis-user] QGIS 3.18.0 and QGIS 3.14.4 (LTR) packages released and OSGeo4W reboot

[Martin Dobias]

Hi Jürgen

Great - thanks a lot for all your efforts!

As for PDAL / point clouds, during the development the initial requirement
for PDAL 2.2 has been later dropped to PDAL >= 1.7:
https://github.com/hobu/untwine/commit/5d83f32f81aa461a9b12f1084197aa7af5f8ec19

The current windows standalone QGIS installer is currently unable to open
LAS/LAZ files, which is confusing to users... Would it be possible to
compile QGIS with PDAL 1.8 (which is already included in osge4w packages) ?
There should be hopefully no code changes necessary. Howard says PDAL 1.8
is quite old and has some bugs, but that's still better than no LAS/LAZ
support at all :-)

Regards
Martin


On Tue, Feb 23, 2021 at 5:37 PM Jürgen E. Fischer  wrote:

> Hi there,
>
> I'm happy to announce that the QGIS packages of 3.16.4 (LTR) 'Hannover'
> and the
> our latest release 3.18.0 'Zürich' are ready on
> https://qgis.org/de/site/forusers/download.html.  This includes Linux,
> Mac and
> Windows packages.  With the availability of a new regular release the
> current
> long-term release 3.16 replaces the previous long-term release 3.10 in the
> long
> term package repositories.
>
> The Windows standalone installer are as usual made from the OSGeo4W
> packages.
>
> In OSGeo4W there has lately been a big effort to reboot it, meaning that
> it has
> been completely rebuilt using newer source versions of mostly every
> package
> using a newer compiler.  As this happened shortly before the QGIS release
> the
> new packages are still in a separate repository for testing.
>
> You can install them using the osgeo4w installer on
> http://download.osgeo.org/osgeo4w/testing/osgeo4w-setup.exe (note the
> testing -
> the old installer will also work, if you point it to the new site, but it
> will
> default to the old).
>
> Within the reboot a lot of old packages were dropped (including
> dependencies to
> old microsoft runtimes), new packages were introduced and also package
> names
> were revised.
>
> Long story short: you cannot upgrade from old installs and have to remove
> and
> reinstall or use a separate directory.  As the new OSGeo4W only supports
> 64bit
> the default root directory was changed to C:\OSGeo4W, which might help with
> that if you were on 64bit earlier.
>
> Also note that it now only has one version of Python - namely 3.9, which
> doesn't support Windows 7 anymore.  Other updates include Qt 5.15, GDAL
> 3.2,
> PROJ 7.2 and SAGA 7.8.
>
> It also has PDAL 2.2 which is required for native support of point clouds
> in
> QGIS - something that you find lacking in the "old" OSGeo4W repository and
> in
> turn in the current standalones.
>
> The new installer also doesn't require administrator privileges anymore.
> Unless you run it elevated (ie. as Administrator) the option to create
> shortcuts for all users will be unavailable.
>
> The testing repository will eventually replace the old repository and also
> be
> used to make standalone installers.   As it has grown to exceed the 2GB
> limit
> of NSIS the standalone installers will then be switched to MSI.
>
> The package recipes currently reside at https://github.com/jef-n/OSGeo4W.
>
> Please test and report packaging issues to the OSGeo4W TRAC at
> https://trac.osgeo.org/osgeo4w.
>
>
>
> 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
> https://www.norbit.de
> QGIS release manager (PSC)  GermanyIRC: jef on FreeNode
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[Qgis-user] All possible routes between two points in a line network

[Prof. Dr. Martin Berchtold]

Hello list,

is there any possibility to calculate all possible routes between two points in 
a line network (and not the shortest or fastest one) and draw them into a line 
layer? In addition, it would be helpful if each route line contained the number 
of "collected" nodes as an attribute. Any idea?

Thanks a lot!
Martin


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Re: [Qgis-user] Diagnosing QGIS slowdown (Windows)

[Martin Pergler]

Helpful, thanks.

I've now created a separate project which uses a (layout)-rendered map from
the main project, and where I selectively pull in individual layers for
editing from the gpkg. That works fine. (I like @baswein's idea of 2
instances drag-and-drop, but I've been fine so far only dragging within one
instance, but from the main project .qgz opened up in the Browser; the
effect is the same)

@Nicolas, so far I've tried creating a single brand new new .shp (non .gpkg)
layer. The general UI sluggishness (in the main project) is the same, as is
the long delay exiting edit mode. But the sluggishness editing a new
feature's attribute form is gone. Ditto for creating a new layer inside my
main .gpkg file. So it's not *directly* related to gpkg vs shp, though if
I'm experiencing problems working with gpkg files overall, especially
complex multi-layer reads from gpkg, that would still be consistent. I
haven't bypassed gpkg completely.

Given the alternate-project workaround, I'll muddle through for a few days,
and next week try if 3.16.2 miraculously fixes the issue. If not, I'll
rebuild my project, which by using saved styles/layer defn files and adding
via the browser from the main project won't be that huge a hassle. Still
some, of course, as I need to fiddle with layer groups and ordering, joins,
project variables and the like. 

Maybe with the new cross-project copying/opening functionality, I should
rebuild the project as multiple, leaner ones anyway. I have accreted about
50 vector layers and 30 raster ones, which turn on and off via themes,
exclusive groups, and temporal ranges. Maybe now's the time to rebuild as
multiple much simpler projects merely accessing the same data store (and
saved styles). 



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Re: [Qgis-user] Question about Qgis - Google Earth historical imagery

[Martin Pergler]

As Ujaval has written, it is not obtainable as tiles.

If you're interested in a specific region, technically you could follow the
manual approach described at
https://gis.stackexchange.com/questions/373497/is-it-possible-to-export-the-google-earth-engine-basemap-satellite-version-not/373610#373610,
using your desired historical image in GE Pro during the process. You also
need to consider any licensing issues (as there may well be with using the
most recent Google imagery tiles outside the Google platform to begin with.)



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Re: [Qgis-user] Diagnosing QGIS slowdown (Windows)

[Martin Pergler]

Thanks for the reply.

System: Lenovo T490, Intel i7 8565U (runs at about 9-20% CPU usage, no
change during the freezes), GEForce MX250 (runs about 20-25% whenever QGIS
is running). 16 Gig physical memory. SSD with capacity, no unusual disk
activity or competing process hogs. All worked just fine until now.

Interestingly, if I create a new project with just a couple of layers I'm
actively editing, there is no problem. That's a temporary workaround, I
guess. And I could rebuild my project file, which would be a hassle but
doable by importing layers one by one from the old project via the browser
to retain the layer properties (and testing after every few to see if/when
the problem arises again). But before taking the time to do that still
hoping for any suggestions on how to track down the processing hog in the
current project, or ideas what typically makes QGIS choke.



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[Qgis-user] Diagnosing QGIS slowdown (Windows)

[Martin Pergler]

Happy user of QGIS since about 3.2. Currently using 3.16.1 (OSGeo4W install)
and experiencing pretty severe performance degradation. I know these things
are a bear to hunt down; would appreciate any suggestions how to go about
finding the cause of the problem.

Symptoms:
- Mild sluggishness rendering canvas with editing turned off, as well as
general UI operations (e.g. tooltips on layers in layer list sometimes first
appear as a black box, and only 1/2s later fill with the actual tooltip)
- Mild sluggishness digitizing new lines or vertex-editing new ones
- Significant slowdown in attribute form for new features digitized (2-3s
response time to type in a text field, for instance)
- When attribute form closed, prior features in layer being edited sometimes
fail to be rendered on canvas (the new one just added is)
- 10-15s freeze (blue circle mouse icon) after exiting edit mode. Edits are
saved properly.

Things worked just fine on the same project until last month, when I took a
break from GIS tasks. In between, I both upgraded 3.16.0 -> .1, as well as a
new Windows OS update installed itself, and some new device drivers. So
plenty of things to blame.

I have already:

1. Uninstalled and reinstalled OSGeo4W completely

2. Tried with a new, no-plugin user profile (sluggishness persists, though a
bit better - so I suspect some low-level slowdown which struggles with
anything additional, but is not directly caused by something in my profile)

3. Checked I have all layers indexed, no crazy validation rules, etc. BTW
all my layers are in a gpkg (or raster TIFFs) on a local drive (and besides
it worked before).

4. Monitored hardware performance. I have adequate hardware for QGIS. CPU
usage stays ~30%, GPU ~20%, temperatures reasonable, RAM usage reasonable.

5. Tried disabling the Browser panel (given some recent bug reports on
Browser and network drives). No effect.

Thanks for any sleuthing suggestions!




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Re: [Qgis-user] DEM error with OpenDataNRW

[Prof. Dr. Martin Berchtold]

Thanks a lot for your help!
It seems that correct functionality only depends on the sequence and sorting of 
Y and X !?
"Cells with same Y coordinates must be placed on consecutive lines. For a same 
Y coordinate value, the lines in the dataset must be organized by increasing X 
values"

The data that works 
(http://www.vermkv.service24.rlp.de/opendat/dgm25/dgm25.zip) is sorted 
according to these organizing rules with ascending X for same Y...:

40.000 547.000 347.382
400025.000 547.000 345.370
400050.000 547.000 342.344
400075.000 547.000 341.794
400100.000 547.000 340.223
400125.000 547.000 337.833

The NRW data sort the other way round (see below). So I probably "just" will 
have to rearrange Y and X in the NRW data to get it ready ... ... ... Yes, 
works! Cool.

Thanks again!
Martin



Von: Nicolas Cadieux 
Gesendet: Montag, 16. November 2020 18:54
An: Prof. Dr. Martin Berchtold ; 
qgis-user@lists.osgeo.org
Betreff: Re: [Qgis-user] DEM error with OpenDataNRW


Hi,

I believe, but Even will confirm, that the data is not organized correctly for 
the gdal driver. I looked at line 2001 and the file is organized by x value 
with incrementing y values.  The x value is constant and the y value change on 
every line.  The error is detected on line 2001 when the x value changes
x y z
32342000.00 5659997.00   43.35
32342000.00 5659998.00   43.41
32342000.00 565.00   43.34
32342001.00 5658000.00   45.16 (line 2001)
32342001.00 5658001.00   45.13
32342001.00 5658002.00   45.00

I reprojected and srtm and save it as a xyz using gdal12xyz and this is what I 
got for the first few lines

xyz

26548864.985 8824521.429 -32768
26548904.304 8824521.429 -32768
26548943.623 8824521.429 -32768
26548982.941 8824521.429 -32768
and at line 4749 thing change to a new y coordinate
26735471.145 8824521.429 -32768
26735510.464 8824521.429 -32768
26548864.985 8824482.110 -32768
26548904.304 8824482.110 -32768

As you can see, the x values changes on every line and the y value is constant 
as stated in https://gdal.org/drivers/raster/xyz.html
"The spacing between each cell must be constant and no missing value is 
supported. Cells with same Y coordinates must be placed on consecutive lines. 
For a same Y coordinate value, the lines in the dataset must be organized by 
increasing X values. The value of the Y coordinate can increase or decrease 
however. The supported column separators are space, comma, semicolon and 
tabulations."


I am not sure the driver can handle this.  You can however open the data as a 
csv and rasterize or interpolate the data (using nearest neighbor) If you use 
the same pixel size and posting, this will work and not change the data.


Perhaps Even R. has a solution.
Nicolas






On 2020-11-16 9:49 a.m., Prof. Dr. Martin Berchtold wrote:
Dear all,

could somebody please explain me why QGIS doesn't process the DEM1 data from 
OpenDataNRW (.xyz, 1 meter, Nordrhein-Westfalen) while the DEM25 data from 
OpenDataRLP (.xyz, 25m, Rheinland-Pfalz, but congruent structure to NRW) works 
out without any problem???

Error message:
Ungültiger Layer: GDAL provider Cannot open GDAL dataset 
C:/[...]/dgm1_05315000_Köln_EPSG4647_XYZ/dgm1_32342_5658_2_nw.xyz: Ungridded 
dataset: At line 2001, change of Y direction Raster layer Datenanbieter ist 
ungültig (Anbieter gdal, URI: 
C:/[...]/dgm1_05315000_Köln_EPSG4647_XYZ/dgm1_32342_5658_2_nw.xyz

There is no change at line 2001... I have no idea, esp. because I can process 
the NRW files in ArcGIS pro without any problem.

Is there a limit of file size or line numbers?

Thanks for any help und kind regards
Martin

---

dvmP
Digitalisierung, Visualisierung & Monitoring in der Raumplanung
Jun.-Prof. Dr. Martin Berchtold

TU Kaiserslautern, Fachbereich Raum- und Umweltplanung
Pfaffenbergstraße 95 | D 67663 Kaiserslautern
Geb. 1, R. U28
T +49 631 205-5151 | M +49 177 3692249
martin.bercht...@ru.uni-kl.de<mailto:martin.bercht...@ru.uni-kl.de>
www.ru.uni-kl.de/dvmP<http://www.ru.uni-kl.de/dvmP>




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Re: [Qgis-user] QGIS Update 3.14.16

[Martin Bittens]

Hello Andrea,

thanks a lot for your response. It is working as well. Great!

Just to understand, why this path has been defined in the installations
of the "QGIS with GRASS" packages? Is there any relation between
"RStudio" and "QGIS with GRASS"?


Regards


Martin


Am 9/24/2020 um 8:12 PM schrieb Andrea Giudiceandrea:

Hi Martin,
in alternative to the working solution proposed by Bas, you could remove
";C:\Program Files\RStudio\bin" from the PATH string in the file
qgis-bin-g7.env (for QGIS 3.14) which is in your %OSGEO4W_ROOT%\bin folder.

Regards.

Andrea Giudiceandrea


baswein wrote

I don't use RStufdio often so what fixed it for me was to change the
Rstudio
folder to RStudioX.





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[Qgis-user] request for help

[Martin KORŇAN]

Hello all QGIS users,

I started to learn how to use QGIS platform through QGIS training manual
and got into section 2.4.10. I am using QGIS 3.14.1-Pi under Windows 10. My
program does not want download style file advanced_levels_demo.qml provided
in exercise_data/styles (directory QGIS-Training-Data-master).

The error message:

Invalid Data Source: C:\Program Files\QGIS
3.14\QGIS-Training-Data-master\exercise_data\styles\advanced_levels_demo.qml
is not a valid or recognized data source.


What is the solution to this problem.


I very value your help and advice.


Best wishes,


Martin Kornan




Martin Kornan, PhD.
Department of Applied Zoology and Wildlife Management
Faculty of Forestry
Technical University in Zvolen
T.G. Masaryka 20
960 53 Zvolen
Slovakia
---
Tel.: +421-45-5206817
E-mail: martin.kor...@tuzvo.sk
www.tuzvo.sk


and

Centre for Ecological Studies
Ustredie 14
013 62 Velke Rovne
Slovakia
-
Tel.: +421-41-5582383
Mobil: +421-910-369932
E-mail: martin.kor...@gmail.com
www.ekoexpertizy.sk
-
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Re: [Qgis-user] QGIS Update 3.14.16

[Martin Bittens]

Sebastian,

how did you know that I used the OSGEO installer and installed RStudio
on my computer?:-)

In fact, that was it! I would never come up with the idea looking for
"rbatch breakes QGIS/Qt" to solve the problem I mentioned.

Thanks a lot.


Martin



Am 9/24/2020 um 5:19 PM schrieb Sebastian Gutwein:

Sorry that link got mangled. The osgeo ticket is here:
https://trac.osgeo.org/osgeo4w/ticket/641
<https://trac.osgeo.org/osgeo4w/ticket/641and>

On Thu, Sep 24, 2020 at 4:18 PM Sebastian Gutwein
mailto:sebast...@regenerativedesigngroup.com>> wrote:

Martin,
I had the same problem. I assume that you are using the OSGEO
installer and also have RStudio installed. See
https://trac.osgeo.org/osgeo4w/ticket/641and
https://github.com/qgis/QGIS/issues/38845
I don't use RStufdio often so what fixed it for me was to change
the Rstudio folder to RStudioX.
-Bas

On Thu, Sep 24, 2020 at 3:53 PM Martin Bittens
mailto:martin.bitt...@gmx.de>> wrote:

Hello QGIS-Users,

today I did the update from QGIS 3.14.2 to 3.14.16 with the
result that
I cannot start anymore the version "QGIS with GRASS 7.8.3". I
received
the following message:

"This application failed to start because no Qt platform
plugin could be
initialized. Reinstalling the application may fix this problem.
Available platform plugins are: direct2d, minimal, offscreen,
window."

Some additional information:

- I am working with Windows 10;

- I got the same result with "QGIS 3.10. with Grass 7.8.3";

- QGIS 3.10 and 3.14.16 (those versions without the GRASS plugin)
working without any problems;

- I checked the internet for solutions but what I found was a bit
confusing to me (creating a python script, changing batch
files to start
up QGIS, etc.).


Maybe somebody has an idea how to get into "QGIS with GRASS
7.8.3" like
I could do before: just click on the bottom and... here we are!

Thank you so much

Regards


Martin



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(631) 241-1018
/
A possible world is better/



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(631) 241-1018
/
A possible world is better/



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[Qgis-user] QGIS Update 3.14.16

[Martin Bittens]

Hello QGIS-Users,

today I did the update from QGIS 3.14.2 to 3.14.16 with the result that
I cannot start anymore the version "QGIS with GRASS 7.8.3". I received
the following message:

"This application failed to start because no Qt platform plugin could be
initialized. Reinstalling the application may fix this problem.
Available platform plugins are: direct2d, minimal, offscreen, window."

Some additional information:

- I am working with Windows 10;

- I got the same result with "QGIS 3.10. with Grass 7.8.3";

- QGIS 3.10 and 3.14.16 (those versions without the GRASS plugin)
working without any problems;

- I checked the internet for solutions but what I found was a bit
confusing to me (creating a python script, changing batch files to start
up QGIS, etc.).


Maybe somebody has an idea how to get into "QGIS with GRASS 7.8.3" like
I could do before: just click on the bottom and... here we are!

Thank you so much

Regards


Martin



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Re: [Qgis-user] PDF Georefernces

[Martin Bittens]

Hello Warren,

if you have some  locations in the pdf-file with known coordinates you
can do the following (for me this procedure works fine in most of the
cases):

1.) Convert the pdf-file into *.tif or *.jpg;

2.) In QGIS open the georeferencer tool (you can find it in the raster
tab of the QGIS main window);

3.) Import the *.tif/*.jpg file  into the georeferencer tool;

4.) Add the coordinates of the known locations into the imported map by
using the "add point" button on top;

5.) Open "Settings --> Transformation Settings", complete the setting
options, and click on "OK";

6.) Click on "Start Georeferencing" (the green triangle on top);


Then you should get what you wanted...!


Regards


Martin



Am 7/13/2020 um 1:36 AM schrieb Warren Thorne:


Hi all,

Thanks for the welcome to the group. I have some PDF’s from historic
reports I want to georeference and import  into QGIS, is this possible?

*Warren Thorne*
*Principal Geologist*


Mineral Resources Limited <http://www.mineralresources.com.au/>



1 Sleat Rd, Applecross, Western Australia 6153

*P *+61 8 9329 3600 *F *+61 8 9329 3601 *M *

*E *warren.tho...@mrl.com.au <mailto:warren.tho...@mrl.com.au> *W
*www.mineralresources.com.au <http://www.mineralresources.com.au>

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Re: [Qgis-user] A few question

[Martin Weis]

On 02.07.20 19:22, blubee blubeeme wrote:
> I have some aerial images;

Are they georeferenced already?


> Warning 4: Failed to open /usr/share/qgis/resources/data/world_map.gpkg:
> Permission denied
> then one of the below messages for each picture that's being imported.
> proj_concatoperation_get_step_count: Object is not a ConcatenatedOperation

No issues, no need to act.

> Is this just an issue with the images or something wrong my steps to create
> orthomosaic from a series of photos.

If these are raw photos you need a bundle adjustment/SfM step to
generate an orthophoto. This cannot be done 'directly' with gdal.
There are some commercial systems and clouds, or you try ODM (Open Drone
Map).
You may also need ground control points etc.

The resulting (georeferenced) orthophoto can be handled in QGIS.

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Re: [Qgis-user] wishing for accurate lattitude/longitude from a cell phone

[Martin Weis]

Dear list,

I would like to add some things here, since I am trying to use RTK GPS
in the field with mobile devices.

> 1) Accuracy of GPS Devices

RTK GPS or any more precice GPS technology will be external, you cannot
get around the missing measurements and lack of algorithms in consumer
grade chips.

Then it depends on the capabilities of the device to receive satellites
of all systems (one or multiple frequencies/signals) and be able to
apply correction data (a question of algorithms). For better equipment
the prices rise quickly.

There are some low cost devices evolving, a new chip was recently
announced: Skytraq PX1122R for about $100. Could be tested with a break
out board and antenna, e.g. see board at navspark shop. The module even
supports PPP, which might be especially interesting where mobile network
is not available.
https://navspark.mybigcommerce.com/px1122r-evb-px1122r-multi-band-quad-gnss-rtk-evaluation-board/

Other low cost solution were mentioned (emlid/REACH, Catalyst, etc).


Am 23.05.20 um 21:51 schrieb Michael.Dodd:
> One app that claims to do a lot of what high precions gps does is> Mobile 
> Topographer Free – Apps on Google Play

> 2) Software

On Android I was able to get the external signal into the system, you
need the app "Bluetoth GPS" (or similar) or a USB2serial + app (better
avoid tiny plugs and large cables during field work). Additionally you
need to override the internal GPS position with the Blue GPS App in the
developer settings (mock provider).

My impression was, that most Android applications target the accuracy of
the device only, so e.g.

* you cannot zoom to cm-levels, only ~100m
* not many proper GIS Apps are available, most are expensive
* Tracking usually does not rely on cm-grade positions, so the apps are
not made for it

One particular thing is, that with high accuracy of the signal, an
internal computation in single precision float will not suffice (all
computations must be in double precision), and you may end up with a cut
off of the last position digits, e.g. if you have 8 digits, 4 before and
4 after the decimal separator (e.g. in DDMM. format), then you end
up with coordinates cut down to 2-3 decimeters in the real world
(typical GPS mouse output, not so uncommon).

So, looking into that aspect may be required, and only few Apps may
implement that (e.g. expensive "surveyor" apps for professionals? did
not test).
BTW, sponsoring the double accuracy implementation for QField is
welcome, as mentioned ot the webpage. It is already a very usable and
FLOSS GIS solution for the field, especially useful if you have a QGIS
workflow already ;)

Finding proper solutions and recommendations still required...



> 
> *From:* Qgis-user  on behalf of
> j.hu...@post-ist-da.de 
> *Sent:* 23 May 2020 20:35
> *To:* qgis-user@lists.osgeo.org 
> *Subject:* Re: [Qgis-user] wishing for accurate lattitude/longitude from
> a cell phone
>  
>
> Hi Steve,
>
> I think there are two different aspects to your question:
> 1) Accuracy of GPS Devices
> I agree with others that you can't expect a better accuracy than the 10
> to 30 feet you observed with a smartphone or a simple handheld GPS. This
> might improve by averaging, but this takes time. Survey grade GPS
> devices are very expensive. It is possible to get good modules and
> antennas as components, but building a complete GNSS system requires
> time and skill. This would reduce cost, but only to several hundred
> instead of several thousand dollars, so this is no option in your case.
> Besides, you will still need a correction data service (usually costly)
> or use two receivers (rover and base).
> So you probably have to stick with your phone, which is more flexible
> regarding the software than a handheld GPS.
>
> 2) Software
> The accuracy of the recorded position should not depend on where you tap
> the screen - a good app should allow to record the current GPS position.
> I am using Locus Map (Asamm Software) for a while now, it works quite
> well, although it does not allow position averaging. There is a free
> version, you could try that first.
>
> Regards,
> Jochen
>
> Am 22.05.20 um 20:54 schrieb Stephen Sacks:
>>
>> In order to make widely available some wise advice, I'm sending to
>> this list a message I received from Neil B.  In addition to Neil's
>> message below, I want to mention that Nicolas Cadieux also provided
>> similar information, saying I'd have to pay around $1,000 for
>> equipment that gives consistently accurate location coordinates.  And
>> thanks, also to Falk Huettmann and Bernd Vogelgesang for their replies. 
>>
>>
>> Message from Neil B:
>>
>> Hello Stephen.
>> Glad that you're having success. I would like to start off by saying
>> that it is best to always reply to the mailing list and not directly
>> to the person who submitted the email. Mailing lists work really well
>> in that there is a pool of people out there 

[Qgis-user] QGIS with Garmin Glo

[Martin Valiquette]

Hi
I need help to get my garmin GLO working with QGIS 3.10.5 and windows 10 on
a Windows surface pro

Windows detects the GLO and associate it to COM3, COM4, COM5 and COM6. Why
4?

In QGIS i try all four com port but the blue led on the GLO keeps flashing.

At no time it asks a 4 digit code.

The com port seems to be at 9600 baud. Is that normal?

Am I skipping a configuration step in windows,

Martin
Magog, QC
819-212-2190
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[Qgis-user] qgis wfs provider loads all features when showing attribute table

[Martin Landa]

Hi,

I am providing an experimental WFS service using MapServer. When
loading the service in QGIS (3.4), only features overlapping map
extent are fetched, so far it's good. Unfortunately QGIS behaves
differently when I try to set up symbology for a WFS layer or just
open an attribute table. Than QGIS tries to load ALL features from WFS
service. This is not desired since WFS layer contains too many
features. Is it possible to change this behaviour in order to show
attributes for features already fetched (and displayed in QGIS).

Thanks, Martin

-- 
Martin Landa
http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa
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Re: [Qgis-user] QGIS 3.10.1A Geotiff Coordinate Transform Problem

[Martin Weinelt]

This was tweeted yesterday from the official account of QGIS:
"Unfortunately, the first version of the 3.10.2 Windows installer was
released using the older gdal 3.0.2 and proj 6.2 versions which cause
crashes. Work on a new installer is ongoing."





On Mon, Jan 20, 2020 at 5:53 PM David Addy  wrote:

> I just downloaded and  opened the new QGIS version 3.10.2 and  clicked on
> Help/About which gives a list of all the installed bits and pieces.
> This release of Version 3.10.2 will still probably be no good for
> transforms
> as it still apparently includes the buggy PROJ 6.2.1 and GDAL 3.0.2.
> I thought the whole reason for delaying this point release was to include
> PROJ 6.3.0, released on January 1st and the GDAL version 3.0.3, released
> early last week, on 13th January.
> QGIS is usually such a great program, but at the moment it cannot cope with
> WGS84 transforms so it cannot be trusted for now.
>
>
>
>
> --
> Sent from: http://osgeo-org.1560.x6.nabble.com/QGIS-User-f4125267.html
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Re: [Qgis-user] Exporting Google map image layout in pdf

[Martin Weinelt]

Jean,

the area you are allowed to use in a layout is quite often limited to
smaller extents with services such as GM.
Give it a try with a map/layout that covers a smaller (really smaller) area
to make sure it's not a technical or usage problem on your side.

Martin


On Tue, Dec 10, 2019 at 3:08 PM jean Lukusa  wrote:

> Hi all,
>
> Whenever I want to export m'y Google map layout  map in pdf ,this later
> shows juste wihite background but not thé image of Google map .
> How can I solve this issue when using Sgis3.10
>
> Exploration and Mining Geologist
> +243(812156128/973741744)
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Re: [Qgis-user] Barbados, Heat map always shows up as degrees

[Martin Sarch]

Nicholas

With you guidance and some tinkering, it worked, thanks

Martin Sarch
78 Moresby Drive
Ottawa, ON
K2M 2J3  Canada

msa...@outlook.com<mailto:msa...@outlook.com>
What3words: infants.crisis.quite
C: 819 329 4801

Sent from my iPad

On Sep 21, 2019, at 12:35 PM, Nicolas Cadieux 
mailto:nicolas.cadi...@archeotec.ca>> wrote:

Hi,
Save the csv in a local crs that uses meters.  You will need to reproject the 
data. I figure 4212 is in long lat?
Nicolas

Le 21 sept. 2019 à 11:52, Martin Sarch 
mailto:msa...@outlook.com>> a écrit :

I have taken some csv population data for and am using EPSG 4212, Barbados 
1938, the data overlays correctly on the but when I try to use the Heatmap 
functionality the Radius is in degrees and I get a warning.  How do I resolve 
this issue?

Thanks Martin

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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[Qgis-user] Barbados, Heat map always shows up as degrees

[Martin Sarch]

I have taken some csv population data for and am using EPSG 4212, Barbados 
1938, the data overlays correctly on the but when I try to use the Heatmap 
functionality the Radius is in degrees and I get a warning.  How do I resolve 
this issue?

Thanks Martin

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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Re: [Qgis-user] About plant count

[Martin Weis]

Hello!

Am 02.09.19 um 02:56 schrieb carlos h:
> Hello, thank you very much, of course, I have examples, they are images of
> Drones in RGB.
>
> I will attach some images (not the orthomosaic since they are very heavy)
> in banana, palm oil and pineapple:
> https://www.dropbox.com/sh/42byg669epahkq2/AABhhshbZVJrpJqWnUSEzcBpa?dl=0


If you have RGB images, you could use EGI=2*G-B-R and a threshold to
segment plants (if they dont overlap in the image), then count it.

But since the plants in your images overlap and other areas are green,
too, this might be difficult (you need to find something to segment
trees based on other features, e.g. to segment the "star"
structure/centers of the trees).

Martin
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Re: [Qgis-user] Dropping the extra label placement algorithms?

[Martin Dobias]

Hi Nyall

On Fri, Jul 26, 2019 at 4:40 AM Nyall Dawson  wrote:
>
> Hey lists
>
> This was first discussed back in 2016 (see
> http://osgeo-org.1560.x6.nabble.com/Removal-of-labeling-search-methods-td5262743.html),
> but would anyone object if the different labeling solution algorithms
> eg "chain" / "pop music" / "falp" / etc were dropped, and we just
> leave the existing default (chain)?

As stated in the earlier email, I would not mind if we remove those.
Are you thinking about removing the option in GUI or to get rid of the
code in PAL for other methods too?


> I don't think ANYONE knows what these mean, and it's a heck of a lot
> of code (which needs fixes) to cart around for no compelling reason
> that I can see.
>
> I have no particular preference to any of the methods, so would
> happily accept a different default if anyone out there can point to
> which method is best!
>
> Googling pop music / tabu / chain only gives a handful of results
> relating to QGIS labeling engine. And googling for "falp" sounds like
> something that would get you flagged on your company's firewall.

To shed some light on the methods for those interested... a good
starting point is PAL docs [1] with links to papers, unfortunately
most links there are broken, but this paper is a good start:
Laurent et al: From Point Feature Label Placement to Map Labelling (2009)

The paper is available here [2] and gives an overview of the whole
process of labeling with PAL. Generally the idea is to turn labeling
into a general combinatoric problem and then apply some heuristic. The
paper also covers the various optimization techniques. FALP seems to
be the most basic initial solution. "Tabu" seems to be a
meta-heuristic method from 1980's [3], "chain" stands for "ejection
chains" concept somehow related to Tabu search. And finally Popmusic
is a search method co-authored from one of the authors of PAL.

I remember there was a paper with quite extensive testing of the
methods, but can't find it anymore. From what I remember, one would
higher amount of labeled features with a slower method (e.g. Popmusic)
or fewer labels with a faster method. If we decide to stick with a
single method, it may be interesting to get the opinion of original
PAL authors on what method to choose... I don't know enough about
those methods to decide.

Cheers
Martin


[1] http://pal.heig-vd.ch/index.php?page=support
[2] 
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.472.4491=rep1=pdf
[3] https://en.wikipedia.org/wiki/Tabu_search
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Re: [Qgis-user] [QGIS-Developer] Sunrise, Sunset, Lunar Calculations

[Martin Dobias]

Hi Calvin

On Thu, Jun 27, 2019 at 9:15 PM C Hamilton  wrote:
>
> How much interested would there be for a plugin to display sunrise and sunset 
> information for a particular location on the earth's surface. Is anyone 
> already working on this? There doesn't seem to be a capability for this, but 
> perhaps I have missed it. Are there other astronomical calculations that 
> would be worth while in QGIS? (Moon asimuth/position, phase)

Just adding another +1 vote to have something like this in QGIS :-) At
some point I would like to look into rendering of shadows of buildings
in QGIS 3D - and for this it would be important to have the ability to
calculate sun position.

Cheers
Martin
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Re: [Qgis-user] Select by Expression with Subquery

[Martin Bain]

Hi Randy,
This might work in QGIS 3 - it's untested because I'm currently on a machine 
with QGIS 2.18 (where the @parent variable is unavailable)

aggregate( 'LAYER2','count',"NAME","NAME"=attribute(@parent, 'NAME')) > 0

The other way might be to create a join to your target layer and then select 
the rows where the value of joined column is not null.

Cheers,
Martin.

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of 
Altergott, Randy (CCI-Southwest)
Sent: Tuesday, 18 June 2019 3:41 AM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Select by Expression with Subquery

Hi QGIS users,
I'm new to QGIS and this is my first question.
Can I use QGIS "Select by Expression" to select all features in a vector layer 
where the "name" field value is also found within another layer (delimited text 
layer with no geometry)? I get a syntax error when using the following SQL.

"NAME" IN (SELECT "NAME" FROM 'LAYER2')

I'm using the "Map Layers" menu to add the layer name, so it actually displays 
something like 'LAYER2_ca36271a_8ec7_4aa7_a36c_67418104f66c' instead of just 
'LAYER2'.

Thanks,
Randy

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Re: [Qgis-user] Query cross-table "similar" time stamps?

[Martin Bain]

Hi Bernd,
I replied to your question on stack exchange (with a similar expression to 
Harrissou)

I initially started with a virtual layer (because I’m a database guy – you know 
the expression “when you only have hammer everything looks like nail”) but then 
I thought I should try to find a more accessible, QGIS way to do it.

Here is the SQL I used in the DB Manager which could be loaded as a layer:

SELECT  *, (select "Tracks"."fid" as PositionId
  FROM "Tracks"
  where julianday("Sightings"."ObsTime" ) 
-julianday("Tracks"."PositionTime")>=0
  order by "Tracks"."PositionTime" DESC LIMIT 1) as 
PositionID
FROM "Sightings"

My two test tables where Sightings(fid,ObsTime) and Tracks(fid, PositionTime).

It creates a look alike of the Sightings layer with an additional column for 
the id of the Position.

I also made another SQL statement which created Line geometries connecting the 
Sighting and the associated position.  That’s on my computer at home which I 
don’t have access to ATM.


Regards,
Martin.

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of DelazJ
Sent: Tuesday, 21 May 2019 1:51 PM
To: Bernd Vogelgesang 
Cc: qgis-user 
Subject: Re: [Qgis-user] Query cross-table "similar" time stamps?

Hi Bernd

I did not understand that you were looking for a way to create a virtual layer. 
Virtual layers require SQL instructions and in this particular case, I think 
you'll need window function (I don't know if supported by the SpatiaLite 
provider in the backend and don't have time to give it a try). This is quite a 
different thing.

From what I understood you wanted to be able to join both layers. This is what 
the expression I'm suggesting is meant to do:
#. Open the birds layer attribute table
# Use the field calculator button to add a new (virtual?) field (it will be 
used store the track id)
#. Populate the field using the provided expression

attribute(get_feature ('track_points','time', aggregate( layer:='track_points',

aggregate:='max',

expression:="time",

filter:="time"< attribute(@parent, 'time'))),'fid')

#. Apply



This expression is a kind of WHERE clause so basically we say update bird_layer 
set yournewfield=fid from track_points where whatisinget_featureparenthesis. 
@parent indeed is a imho hidden variable that refers to the feature in the bird 
layer. [0]

What dialect is it? QGIS' (highly inspired from sql... (and python?)). I don't 
know if it has a proper name and there's no better doc as far as I know than 
looking at the functions' help in the expression dialog and practice. You 
quickly get the logic. You also have some samples in the user manual [2]. And 
probably in some tutorials out there.

Yes single or double quotes are important and have their meaning [3]



Then you can do whatever you want with this field (label, symbolize with 
geometry generator [1] eg line connecting track_point and bird, the usual join 
of layers...)


PS: I did not test your data since the date formatting I had in the temporary 
layers I used was the same as in your picture (that i only viewed after I sent 
my first reply)


[0] 
https://docs.qgis.org/3.4/en/docs/user_manual/working_with_vector/expression.html#variables-functions
 actually polished at https://github.com/qgis/QGIS-Documentation/pull/3753
[1] 
https://docs.qgis.org/3.4/en/docs/user_manual/working_with_vector/style_library.html#the-geometry-generator
[2] 
https://docs.qgis.org/3.4/en/docs/user_manual/working_with_vector/expression.html
[3] http://osgeo-org.1560.x6.nabble.com/SQL-Expressions-tp5190508p5196052.html

Hope that helps,
Harrissou

Le lun. 20 mai 2019 à 19:42, Bernd Vogelgesang 
mailto:bernd.vogelges...@gmx.de>> a écrit :
Am 18.05.19 um 11:42 schrieb DelazJ:
Hi Bernd,
Hum.. interesting. Assuming you have two layers: tracks (id_track, date_track) 
and birds(id_bird, date_bird), the idea is to get the id of the highest among 
the date_track(s) lower than the date_bird for each bird. Am I right?
I gave it a shot and i think i have some working expression. Here I display the 
matching track id in birds labels

attribute(
  get_feature ( 'tracks',
  'date_track',
  aggregate( layer:='tracks',
  aggregate:='max',
  expression:="date_track",
  filter:="date_track"< attribute(@parent, 
'date_bird')
  )
 ),
  'id_track'
)

I used temporary layers with datetime field.
Now, without sample of dataset to actually see the date formatting issue you 
were afraid of...

Hope that helps,
Harrissou


Hi Harrissou,

I tried your expression in a virtual layer, but it throws an error

Query execution error 

Re: [Qgis-user] 3D map scripting

[Martin Dobias]

Hi Darrel

On Fri, May 17, 2019 at 4:03 PM Darrel Maddy
 wrote:
> I am happy with the views I am creating manually now and I have been looking 
> for a way to automate this process (as I do not want to prepare 7000 frames 
> individually). Can this be done in scripting? Or is there a macro type 
> facility that at least would ease the pain ?
>
> I am happy to write the code (in Python) if there is a way to access the 3d 
> map window. It also appears that the settings cannot be saved i.e. any 
> changes to the default view – again anyway to keep this persistent would be 
> welcome. Maybe I am just missing something obvious?

Currently there is only limited API support for 3D map views. For
example, you can set 3D renderers for your vector layers, but some
functionality is not available in Python (like access to the 3D map
view or creation of "offline" 3D renderer that would allow you to
trigger 3D rendering upon request).

Can you explain in a bit more detail what are the bits you would like
to modify for every new frame? How are the 7000 data overlays
represented? I may have some time to make the necessary API
functionality available in QGIS 3.8 which will be out soon.

Cheers
Martin
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[Qgis-user] GeoPython 2019 - Call for QGIS Contributions

[Christen Martin]

Hi all,

The 4th GeoPython Conference takes place again in Basel, Switzerland this year 
June 24-26. ( http://2019.geoypthon.net ).
The call for speakers will end tomorrow, we got many proposals so far but 
looking at them I didn't really see anything QGIS related which is quite 
unfortunate.

It would be great if someone wants to present something about QGIS Plugins / 
Automation using Python.

I know the call will close tomorrow (March 15), but a title with short abstract 
would be enough, a detailed description could follow later. In addition, I will 
try to keep the call open until Sunday evening CET.
Submissions can be done here: https://submit.geopython.net/geopython2019/

Kind regards,
Martin






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Re: [Qgis-user] QGIS 3 Frozen

[Martin Bittens]

Hello Colleagues,

here an update about problems with the plugin manager (as described in 
my previous email):


By incidence I discovered that my internet connection via the wifi 
router changed from 2.4GHz to 5GHz. That means I did the download and 
installation of the QGIS updates using the 5GHz connection (without any 
problems). Starting QGIS and trying to open the plugin manger led to a 
frozen QGIS, as already mentioned. Just because I didn't get any idea 
how to solve the problem I switched the internet connection back to 
2.4GHZ (remembering that in the past I always used this connection and 
didn't get any problems with the plugin manager).


The result: In QGIS 3.7.0 and 3.6.0 the plugin manager is working, in 
QGIS 3.4.5 I got this:



The 'Copy Report' button is greyed out, creation of a report does not work.


Can anybody give an explanation what is going on with QGIS?

I do not understand:

1.) why the use of the plugin manager is depending on the type of the 
internet connection (2.4GHz/5GHz) and


2.) why QGIS 3.4.5 is crashing anyway independent if I am using a 2.4GHz 
or a 5GHz connection?



Thank you for your help.


Martin



Am 3/5/2019 um 12:24 PM schrieb Martin Bittens:

Hello Colleagues,

After I made the latest update I don´t get access to the plugin 
manager. Clicking on 'Plugins - Manage and Install Plugins...' QGIS 
stops to work. No error message appears, and to close QGIS I need to 
use the windows task manager. Currently, there are 3 QGIS versions on 
my computer:


QGIS 3.4.5

QGIS 3.6.0

QGIS 3.7.0

The result is always the same. QGIS is frozen.

I am working with Windows 10.

Does anybody know what is the reason for that error?

Thank your for your help.



Martin




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[Qgis-user] QGIS 3 Frozen

[Martin Bittens]

Hello Colleagues,

After I made the latest update I don´t get access to the plugin manager. 
Clicking on 'Plugins - Manage and Install Plugins...' QGIS stops to 
work. No error message appears, and to close QGIS I need to use the 
windows task manager. Currently, there are 3 QGIS versions on my computer:


QGIS 3.4.5

QGIS 3.6.0

QGIS 3.7.0

The result is always the same. QGIS is frozen.

I am working with Windows 10.

Does anybody know what is the reason for that error?

Thank your for your help.



Martin




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Re: [Qgis-user] Attribute "cat" in grass7

[Martin Landa]

Hi,

st 19. 12. 2018 v 21:43 odesílatel Benjamin Ducke  napsal:
> I think rather than worrying about all of that I
> would just ignore "cat" or manually delete that
> column from result data.

btw, processing framework could be modified to call v.out.ogr with -s
flag (Skip export of GRASS category ID ('cat') attribute) [1]. Then
`cat` attribute wouldn't be exported.

Ma

[1] https://grass.osgeo.org/grass74/manuals/v.out.ogr.html

-- 
Martin Landa
http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa
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Re: [Qgis-user] QGIS 3.4.2/GRASS

[Martin Bittens]

Luigi Pirelli,

thank you so much for your hints.

My QGIS 3.4.2 /GRASS installation is as follows:

PATH=C:\OSGEO4~1\apps\qgis\bin;C:\OSGEO4~1\apps\grass\grass-7.4.2\lib;C:\OSGEO4~1\apps\grass\grass-7.4.2\bin;C:\OSGEO4~1\apps\Python37;C:\OSGEO4~1\apps\Python37\Scripts;C:\OSGEO4~1\apps\qt5\bin;C:\Rtools\bin;C:\Rtools\mingw_32\bin;C:\Rtools\mingw_64\bin;C:\Program 
Files\MiKTeX 
2.9\miktex\bin;C:\OSGEO4~1\apps\Python27\Scripts;C:\OSGEO4~1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\WBem;C:\OSGEO4~1\apps\msys\bin;C:\Program 
Files\R\R-3.4.4\bin\x64;C:\Program Files\RStudio\bin

GDAL_DATA=C:\OSGEO4~1\share\gdal
GDAL_DRIVER_PATH=C:\OSGEO4~1\bin\gdalplugins
GDAL_FILENAME_IS_UTF8=YES
GEOTIFF_CSV=C:\OSGEO4~1\share\epsg_csv
GISBASE=C:\OSGEO4~1\apps\grass\grass-7.4.2
GRASS_PROJSHARE=C:\OSGEO4~1\share\proj
GRASS_PYTHON=C:\OSGEO4~1\bin\python.exe
JPEGMEM=100
OSGEO4W_ROOT=C:\OSGEO4~1
PROJ_LIB=C:\OSGEO4~1\share\proj
PYTHONHOME=C:\OSGEO4~1\apps\Python37
QGIS_PREFIX_PATH=C:/OSGEO4~1/apps/qgis
QT_PLUGIN_PATH=C:\OSGEO4~1\apps\qgis\qtplugins;C:\OSGEO4~1\apps\qt5\plugins
QT_RASTER_CLIP_LIMIT=4096
VSI_CACHE=TRUE
VSI_CACHE_SIZE=100
O4W_QT_PREFIX=C:/OSGEO4~1/apps/Qt5
O4W_QT_BINARIES=C:/OSGEO4~1/apps/Qt5/bin
O4W_QT_PLUGINS=C:/OSGEO4~1/apps/Qt5/plugins
O4W_QT_LIBRARIES=C:/OSGEO4~1/apps/Qt5/lib
O4W_QT_TRANSLATIONS=C:/OSGEO4~1/apps/Qt5/translations
O4W_QT_HEADERS=C:/OSGEO4~1/apps/Qt5/include

I am not sure if these settings are those you want to see. If you do 
need more, please let me know.


As far as I understood the QGIS 3.4.2 settings GRASS 7.4.2 should be 
used. After I read your comment on the path issues I checked the 
/apps/grass folder. 3 different versions are installed there:


grass-6.4.3

grass-7.4.2

grass-7.7.svn

In accordance to your advice I removed the .svn term from the GRASS 7.7 
folder name and - it works. I can use now the GRASS commands in QGIS 
3.4.2. Additionally I changed in the same way the folder name in the 
grass77svn.bat and the related env.bat using GRASS 7.7.svn as a 
stand-alone application as well.


I am  wondering which GRASS version QGIS 3.4.2 actually is using? 
Unfortunately in the QGIS 3.4.2 menu 
Settings/Options/Processing/Providers/GRASS there is no longer an option 
available that allows to define the path to the correct GRASS version 
(as it was in QGIS 3.2.1 - which was my last QGIS 3 version).


Best regards

Martin


Am 12/10/2018 um 4:48 PM schrieb Luigi Pirelli:
processing Grass7Utils.py is trying to understand the grass folders 
assuming that the path is something like grass-... 
in your case this path is grass-svn => bang! trying to convert it as 
int! it's, I'm almost sure, a bug... can you fill an issue in 
https://issues.qgis.org/projects/qgis/issues/new


the fix is simple, but please share more about what is your qgis 
installation and grass configuration


regards

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 Mon, 10 Dec 2018 at 19:09, Martin Bittens <mailto:martin.bitt...@gmx.de>> wrote:


Hello!

Today I made an update to QGIS 3.4.2 and now I can't use anymore the
GRASS commands in the toolbox The following python error message
appears
when I try to open a GRASS command:

2018-12-10T16:00:28 WARNING    Traceback (most recent call last):
   File

"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\gui\ProcessingToolbox.py",

line 223, in executeAlgorithm
   ok, message = alg.canExecute()
   File

"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Algorithm.py",

line 1020, in canExecute
   message = Grass7Utils.checkGrassIsInstalled()
   File

"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py",

line 468, in checkGrassIsInstalled
   if Grass7Utils.installedVersion() is not None:
   File

"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py",

line 98, in installedVersion
   if Grass7Utils.grassBin() is None:
   File

"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py",

line 153, in grassBin
   path = Grass7Utils.grassPath()
   File

"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py",

line 212, in grassPath
  

[Qgis-user] QGIS 3.4.2/GRASS

[Martin Bittens]

Hello!

Today I made an update to QGIS 3.4.2 and now I can't use anymore the 
GRASS commands in the toolbox The following python error message appears 
when I try to open a GRASS command:


2018-12-10T16:00:28 WARNING    Traceback (most recent call last):
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\gui\ProcessingToolbox.py", 
line 223, in executeAlgorithm

  ok, message = alg.canExecute()
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Algorithm.py", 
line 1020, in canExecute

  message = Grass7Utils.checkGrassIsInstalled()
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", 
line 468, in checkGrassIsInstalled

  if Grass7Utils.installedVersion() is not None:
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", 
line 98, in installedVersion

  if Grass7Utils.grassBin() is None:
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", 
line 153, in grassBin

  path = Grass7Utils.grassPath()
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", 
line 212, in grassPath
  grassfolders = sorted([f for f in os.listdir(testfolder) 
if f.startswith("grass-7.") and os.path.isdir(os.path.join(testfolder, 
f))], reverse=True, key=lambda x: [int(v) for v in 
x[len("grass-"):].split('.')])
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", 
line 212, in
  grassfolders = sorted([f for f in os.listdir(testfolder) 
if f.startswith("grass-7.") and os.path.isdir(os.path.join(testfolder, 
f))], reverse=True, key=lambda x: [int(v) for v in 
x[len("grass-"):].split('.')])
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", 
line 212, in
  grassfolders = sorted([f for f in os.listdir(testfolder) 
if f.startswith("grass-7.") and os.path.isdir(os.path.join(testfolder, 
f))], reverse=True, key=lambda x: [int(v) for v in 
x[len("grass-"):].split('.')])

 ValueError: invalid literal for int() with base 10: 'svn'


The GRASS plug-in is working (with GRASS 7.4.2). I am running a Windows 
10 machine.


Does anybody know how to solve the problem?

Thank very much


Martin


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Re: [Qgis-user] [ubuntu] Error when starting QGIS

[Martin Weis]

Am 22.11.18 um 09:47 schrieb psantana:
> I installed via apt-get the latest version of QGIS following this
> documentation:
> https://qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu
> 
> qgis=1:3.4.1+28bionic
> ubuntu version: 18.04
> 
> When starting to start the app I get this exception:
> 
> $ qgis
> /usr/bin/qgis.bin: relocation error:
> /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5: symbol
> _ZTI20QOpenGLShaderProgram version Qt_5 not defined in file libQt5Gui.so.5
> with link time referenc>
> I have installed these packages: qgis python-qgis qgis-plugin-grass
> 
> Do you guys know where is the problem?

Not exactly, but did you add the ubuntu-gis non-ltr ppa?

Below is my qgis.list with all entries to quickly change between LTR and
3.4 versions by switching
deb https://qgis.org/ubuntugis xenial main
vs.
deb https://qgis.org/ubuntugis-ltr xenial main

You need also to change xenial to bionic everywhere.

After changing the following should remove the deps properly and
reinstall the new version:

apt update
apt remove qgis-common python-qgis qgis-providers-common
python-qgis-common qgis-provid
er-grass
apt autoremove
apt install qgis python-qgis qgis-provider-grass qgis-providers


more /etc/apt/sources.list.d/qgis.list

# ubuntugis unstable
deb http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu xenial main
deb-src http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu
xenial main


# Nightly build for Debian and Ubuntu [5]
# deb http://qgis.org/debian-nightly xenial main
# Nächtliche Paket mit UbuntuGIS Abhängigkeiten
# deb http://qgis.org/ubuntugis-nightly xenial main

# Long Term Release Repository  2.18.x Las Palmas LTR
# Freigabe für Debian und Ubuntu
# https://qgis.org/debian-ltr
# Release with ubuntugis-unstable dependencies
# deb https://qgis.org/ubuntugis-ltr xenial main
# Nächtliches Paket des zukünftigen Pointreleases für Debian und Ubuntu
# https://qgis.org/debian-nightly-ltr
# Nightly build of upcoming point release with ubuntugis-unstable
dependencies
# https://qgis.org/ubuntugis-nightly-ltr


# Latest Release3.2.x Bonn
# Freigabe für Debian und Ubuntu
# deb https://qgis.org/debian
# Release with ubuntugis-unstable dependencies
deb https://qgis.org/ubuntugis xenial main
# Nächtliches Paket des zukünftigen Pointreleases für Debian und Ubuntu
# https://qgis.org/debian-nightly-release
# Nightly build of upcoming point release with ubuntugis-unstable
dependencies
# deb https://qgis.org/ubuntugis-nightly-release xenial main
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Re: [Qgis-user] Measurement tool

[Martin Weis]

Am 02.11.18 um 13:36 schrieb Josh Hull:
> inaccurate measurement when I am measuring both area and straight line 

> and its using WGS 84 / Pseudo-Mercator. I primarily use the software for 
> maps in north central United States.

Pseudo-mercator might be your issue here, it might have large
distortions, since your region is far away from equator.
Consider using UTM for metric units and measurements.

And have a look for the CRS of your project,according to:
https://docs.qgis.org/2.8/en/docs/user_manual/introduction/general_tools.html#measuring
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Re: [Qgis-user] Problem with 3D View: lots of empty (white) holes

[Martin Dobias]

Hi Agustin

On Wed, Oct 3, 2018 at 7:02 PM Agustin Lobo  wrote:
> I have a DEM for an Island with horseshoe shape, sea as no data.
> When I represent it in 3D, I get all the "no data" propagated to a
> much larger extension.
> See snapshots:
> https://www.dropbox.com/s/i6vm728481qnx2a/Captura1.JPG?dl=0
> https://www.dropbox.com/s/t35v47pg0v5b774/Captura2.JPG?dl=0

This is a known limitation. If you specify higher "Tile resolution",
the effect should be less pronounced (e.g. try 256px instead of the
default 16px). As you zoom in, the problem should also increasingly
disappear as more detailed terrain tiles get loaded. To help you
understand what is going on - the terrain entity is composed of tiles,
each tile samples height from your DEM, by default 16x16 samples per
tile. If some of the samples contain "no data" values, we cannot
create vertices in the terrain for them and so we cannot build faces
around those values.

Probably the best solution to this is to fill the "no data" values in
your DEM for better looking 3D view.

Cheers
Martin
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[Qgis-user] Wrong Path

[Martin Bittens]

Hello, good afternoon.

I got some trouble with the OSGeo4W Shell after I did the latest QGIS 
update (to QGIS 2.18.24 64bit). Some of the Shell commands I'd use in 
the past do not work anymore.


E.g., for checking the installed python packages: pip freeze --> Fatal 
error in launcher: Unable to create process using 
'"c:\osgeo4~1\bin\python.exe" 
"C:\OSGeo4W64\apps\Python27\Scripts\pip.exe" ';


or

installing a new package: pip install geopy --> Fatal error in launcher: 
Unable to create process using '"c:\osgeo4~1\bin\python.exe" 
"C:\OSGeo4W64\apps\Python27\Scripts\pip.exe" install geopy'.


Interestingly I can use the pip command if I type at the Shell prompt: 
c:\OSGeo4W64\bin\python.exe "C:\OSGeo4W64\apps\Python27\Scripts\pip.exe" 
install geopy. Then the installation process is running correctly.


I do not know why "\osgeo4~1" appears in the path although the setting 
is: set osgeo4w --> OSGEO4W_ROOT=C:\OSGeo4W64


QGIS is installed in the directory C:\OSGeo4W64, OS: Windows 10.


Does anybody know a solution for that problem?


Thank you very for your advice.


Martin



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Re: [Qgis-user] Crayfish Plugin

[Martin Dobias]

Hi Matt

On Fri, Aug 10, 2018 at 2:00 PM Matt Boyd  wrote:
>
> Hi QGISers,
> I've started doing work (well, study and also not so much doing as learning) 
> with geological models in with time and other parameter series mesh grids.
> I'm trying to get some data in xdmf format into Crayfish. Is there anyone who 
> is working with this sort of data on this list? I'm havign trouble getting my 
> data loaded. various errors and what could be unsupported formats.

If you have problems opening some data, feel free to open a new issue
in the Crayfish bug tracker:
https://github.com/lutraconsulting/qgis-crayfish-plugin

Cheers
Martin
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[Qgis-user] Provider Error

[Martin Bittens]

Hello QGIS Users.


I want to create a text field in an attribute table which contains some 
data points by using the field calculator. So I selected:



- Create a new field

- Output field name: Comment

- Output field type: Text (string)

- Output field length: 10

- Text input: 'Area 2'


The Output preview shows: 'Area 2'. By clicking on "OK" I receive the 
following message: "Could not add the new field to the provider"


My system is: Windows 10, QGIS2.18.21.

In the previous versions of QGIS I did not get that error when I added 
with the field calculator text fields in attribute tables.


Does somebody know a solution solving the error?


Thank you very much.


Martin


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Re: [Qgis-user] 3D Map Views and XYZM values

[Martin Dobias]

Hi Tyler

On Wed, Jun 20, 2018 at 4:01 PM, Tyler Veinot  wrote:
> Hi All;
> I have been experimenting with the 3D viewer in QGIS3 and was wondering how
> the ZM values are interpreted or if they are at all. When I tested with the
> points and polygons it looked like the Z was interpreted as a extrusion or
> height; but when I measure all objects seem to be the same size regardless
> of M value can someone verify if a M value is interpreted at all in the 3D
> view?

Z values are interpreted as elevation - this should work for points,
linestrings and polygons.
M values are not interpreted.


> Another question, for polygons I can use fields to define things like,
> extrusion, elevation, scale, etc...  but I cannot for points or lines in 3D;
> I was sure I could do this in the 3.0.0 build (currently at 3.0.3). Is
> adding this capability something that is being looked into for future
> versions?

Right, this is not implemented yet. Hopefully it will be added
sometime soon, but there is no roadmap for that...

Regards
Martin
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Re: [Qgis-user] layers shift when exporting from composer to jpg

[Martin Fisher]

I do not know why you have encountered this problem, but perhaps you could try 
and alternative approach, depending on what you could like on the background. 
The obvious choice may be to use an ESRI map service from 
http://server.arcgisonline.com/arcgis/rest/services, as a WMS layer.

Best of luck

On May 28 2018, at 3:57 pm, MIKE MCGRADY  wrote:
>
>
>
> I wanted to make a quick map using composer using a google hybrid map as 
> background. Everything looked fine in the preview, but when I looked at the 
> jpg, the data were no longer in the right space, having shifted some few km 
> to the west. I am using QGIS 2.8.3 Wien. Am I missing something? Any work 
> around?
>
> I am not very experienced with QGIS, so simple instructions work best (in all 
> things)
>
>
>
> M. J. McGrady
> Am Rosenhugel 59
> A-3500 Krems
> Austria
>
>
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Re: [Qgis-user] qgis3 3D view vertical scale inconsistency

[Martin Dobias]

Hi Adam

On Wed, May 2, 2018 at 9:29 PM, Adam Dershowitz <de...@alum.mit.edu> wrote:
> I have been working with the new 3D view in qgis3.  I have a project where I 
> have terrain (elevation data) and then some points above the terrain in 
> space.  If I enable 3D rendered for the vector points, and set altitude 
> clamping to Absolute, and then open a new 3D view it appears to be at a 
> reasonable scale and looks good.  However, it can be useful to change the 
> vertical scale to improve the view.  If I go to 3D Configuration and change 
> the Terrain->Vertical scale to 2.0 then the terrain grows, as expected, but 
> the vector points stay at the same elevation, and some end up below the 
> surface.
> Is there a way to change the whole vertical scale for the 3D view?  It seems 
> like leaving the vector points at one vertical scale and the terrain at a 
> different one, is misleading and I would consider it a bug.  The only 
> temporary work around that has occurred to me so far is to calculate a whole 
> new vector layer, that is calculated from the original one but scaled 
> differently, and then display that one instead.  But that seems like it is 
> not the easiest solution, and means that one would have to recalculate new 
> vector layers for every change in scale.

So the point layer has Z coordinates with elevation? What method of
altitude clamping have you chosen for the point layer's 3d renderer?
It seems like you are using absolute clamping... the other two methods
respect the vertical scale.

Regards
Martin
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Re: [Qgis-user] QGIS Project

[Martin Weis]

Hello Marco!

Am 12.04.2018 um 08:31 schrieb Marco Dinges:
> What my question is now about, is that I want to receive position
> data (coordinates) from another program (not a GPS) on the raspberry
> and track that position on my map. Even better with a visualization
> on my desktop. Another thing I want to do is something like a
> navigation system, where I can give coordinates to the map and get a
> live navigation back from it.
> 
> Is something like pushing your own Position data on the map while
> being online generally possible?
> 
> How should I start working on it and where might I find more
> Information about that?

Sounds like you should look into a gpsd, which usually provides
(network) APIs for GPS data, but you should be able to push your own
data through it (maybe only geographical coordinates), included tools
like gpsfake come to my mind for a quick start.

Then you can use the standard GPS input in QGIS (or one of the many
other tools able to listen to gpsd).

Martin
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Re: [Qgis-user] Help in Field Calculator

[Martin Weis]

Hi,

Am 04.04.2018 um 14:27 schrieb Daniel Alejandro Montecinos Rubilar:
> What I try to do is then updated columns in a data layer with
> another layer. For example , I have two layers A = Poligono , B =
> Points . The layer B contains real values. Then would do two things.
> 1. Count how many points of the layers B are within the layer A. 2.
> From the points of the layer B that are within the polygon layer A, I
> need the sum of their values ​​and paste this sum in a column of
> created layer

"Count points in polygon" (Vector->analysis tools) and "Join attributes
by location" (Processing toolbox->vector general tools) are the
operations you seem to be looking for.


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[Qgis-user] QGIS 3.0.1

[Martin Bittens]

Hello, dear QGIS-Users.

Today I tried to install the latest version of QGIS (QGIS 3.1, 64bit 
network installation). The download and the installation process worked 
fine, but the post-install stopped at "/etc/postinstall/qgis.bat". I 
could only click on "Cancel" to finish the installation what led to an 
uncompleted, not working QGIS. I tried also the express installation but 
got the same result. The installation stopped as soon as the 
post-install started. My computer is a Win10-64bit machine. Under Win7 
which I am running in a virtual machine on the same computer the QGIS3 
installation worked perfect without any problems.


Does anybody know how I can solve the problem?

Thank you for your help.


Martin

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Re: [Qgis-user] Can't install / use NTv2 grid file.

[Martin Weis]

Hello,

Am 26.03.2018 um 12:09 schrieb Jürgen E. Fischer:
> On Sat, 24. Mar 2018 at 15:20:01 -0700, tomi_w wrote:
>> (http://geodaten.bayern.de/oadownload/bvv_internet/kanu/BY-KanU_Oberfranken_Testdatei_vorlaeufig.zip),
>> which I have extracted and copied to /usr/share/proj/oberfranken.gsb.
> 
> The GSBs are not automatically picked up.  You'll have to add a row (similar 
> to
> the ones with BETA2007.gsb) to the tbl_datum_transform table in
> resources/srs.db or simply rename your grid to BETA2007.gsb.

Hm, often you need both transformations,  since BETA is for whole
Germany, the others locally (often per federal state).

I checked in visualisations of differences for the new BWTA2017 of
Baden-Württemberg here:
https://github.com/Marwe/bwta2017data

I sent the following accidentially via PM, just some additional pointers

See (in German)
http://www.gkg-kassel.de/pdf/Praezise_Transformation_im_QGIS_mit_Batchmodus.pdf
for details, you need to add it to qgis' sqlite database of
transformations.

More related stuff:
https://gis.stackexchange.com/questions/50365/projecting-shp-from-gk3-to-utm32-with-beta2007#50384
https://issues.qgis.org/issues/11347

Martin
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Re: [Qgis-user] 3D Surfaces in QGIS3

[Martin Dobias]

Hi Adam

On Fri, Mar 9, 2018 at 6:17 PM, Adam Dershowitz <de...@alum.mit.edu> wrote:
> One of the features that I was most excited about for QGIS3 was 3D views.  
> One of my projects has 3D polygons above the ground elevation surface, and I 
> was hoping to display them in QGIS.
> I figured out that I need to change the layer properties->3D View and Enable 
> 3D render.  Now, it does display the polygon in space.  But, the polygon is 
> always fully opaque.  If I change the layer opacity, it does change the 
> opacity of the projection of the polygon on the ground, but not of the actual 
> polygon in space.
> Is there anyway to change the opacity of the polygon in 3D space, so I can 
> see the ground through it?

Transparency is currently not supported in 3D view - all objects are
fully opaque. In 3D, rendering of semi-transparent objects is not
trivial and requires some advanced tricks.

Regards
Martin
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Re: [Qgis-user] Error 3D View QGIS 3.0 - *Crash ID*: 40e66737578440d0e4a40fa8545b665a86f88731

[Martin Dobias]

Hi

On Wed, Mar 7, 2018 at 9:43 AM, Andreas Neumann <a.neum...@carto.net> wrote:

> Hi,
>
> Yes - I also heard that certain graphic cards have issues with QGIS 3D,
> unfortunately. For these issues, the only solution is to switch to a
> different machine with a different graphics card. Lets hope that future qt
> versions will fix this issue.
>
Currently we have two bug reports (and a few duplicates) referring to this
problem:
https://issues.qgis.org/issues/17416
https://issues.qgis.org/issues/17315
(they could be probably merged into one report - the backtraces are nearly
identical.

>From what I can tell, this has been an issue just on Windows with some
Intel graphics cards. It could be related to a particular version of the
drivers as well. My laptop also has Intel graphics card, but I have not had
any crashes.

Maybe if affected users posted their graphics card model + driver version,
we could find get closer to identifying the source of the problem.

Regards
Martin
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[Qgis-user] Auxillary storage fields and field calculator

[Martin]

Hi,

I have a postgis dataset that currently has sets of label x , y and rotations 
for different projects. Moving to QGIS 3 I would like to remove these fields 
and use auxillary storage instead. 
I have created the auxillary storage fields and I would like to use the field 
calculator to copy the data from the label_x fields in the potgis dataset into 
the new fields. When I try to "Update existing field" the auxillary storage 
fields are not listed. I can use them as inputs to an expression but not as 
outputs. 
I couldn't find this discussed so not sure if this is a known limitation.

Thanks for the help.

Martin 


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Re: [Qgis-user] GRASS plugin in QGIS

[Martin Landa]

Hi,

2018-02-22 16:41 GMT+01:00 Siwei He <hesiwe...@gmail.com>:
> Thank you for your information. Could you please tell me how to downgrade
> GRASS to 7.2. I have tried to install GRASS722, but it is said that no
> available package candidate. I also find the repository for GRASS 7.2 'sudo
> add-apt-repository ppa:ubuntugis/ubuntugis-stable', but I cannot add it to
> my repository.

or install QGIS from UbuntuGIS unstable [1], it's compiled against GRASS 7.4.0.

Ma

[1] https://launchpad.net/~ubuntugis/+archive/ubuntu/ubuntugis-unstable

-- 
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[Qgis-user] QGIS 2.99 - GRASS

[Martin Bittens]

Hello, friends of QGIS.

Since a couple of days I am trying to solve a problem I got with the 
GRASS modules provided in the processing toolbox of QGIS 2.99 (latest 
download today). After downloading the latest 2.99 version I got an 
error message when I open a GRASS module. It's like this:


WARNING    Traceback (most recent call last):
              File 
"C:/OSGEO4~1/apps/qgis-dev/./python/plugins\processing\gui\ProcessingToolbox.py", 
line 269, in executeAlgorithm

                ok, message = alg.canExecute()
              File 
"C:/OSGEO4~1/apps/qgis-dev/./python/plugins\processing\algs\grass7\Grass7Algorithm.py", 
line 914, in canExecute

                message = Grass7Utils.checkGrassIsInstalled()
              File 
"C:/OSGEO4~1/apps/qgis-dev/./python/plugins\processing\algs\grass7\Grass7Utils.py", 
line 460, in checkGrassIsInstalled
                'GRASS 7\nfolder is correctly 
configured'.format(os.path.join(path, 'bin')))

            NameError: name 'path' is not defined

GRASS 7.2.2 is installed (the settings menu shows: 
C:/OSGeo4W64/apps/grass/grass-7.2.2) and the GRASS 7.2.2 plugin is 
working fine. My Windows system: Windows 10 Professional, 64-Bit.


Btw.: with the QGIS version I had used before I downloaded the above 
mentioned version (as far as I remember I installed the previous version 
sometime in November or December 2017) the GRASS modules did work fine.


Does anybody get an idea what is going wrong?

Thank your for your help.


Martin




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Re: [Qgis-user] Why does this message keeps occuring in QGIS? GEOS geoprocessing error: One or more input features have invalid geometry.

[Martin Weis]

Am 16.01.2018 um 21:05 schrieb David Shi:
> It is not merge.  I am trying to intersect two vector ShapeFiles.
> Each contains a collection of polygons.  Each collection of polygons
> cover the same geography, but has different boundaries. Can I do
> that?

Sounds like a classic intersect, did you try that already?
You get the combination of the two layers, if you have overlapping
polygons with different geometries, then all boundaries are kept and the
new polygons are bound by them (likely to be more than in each layer due
to combinations).
Attributes of both layers are appended.

If you get errors due to invalid geometries, well, then correct that
beforehand.

Martin
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Re: [Qgis-user] Areal Interpolation in QGIS

[Martin Weis]

Hello!

Am 16.01.2018 um 12:53 schrieb David Shi:
> Is there any Areal Interpolation code in QGIS?

Yes, but it depends on what you have. Activate interpolation plugin and
use it. If you have points and want areas from them, try voronoi, if you
have two layers you want to combine, there are interpolation or
attribute related functions.

You see, you need to be more specific or look if the above tool already
help.

Martin
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Re: [Qgis-user] ubuntugis: Broken after update to 2.18.14

[Martin Landa]

2017-11-29 13:45 GMT+01:00 Patrick Dunford <enzedrailm...@gmail.com>:
> I have a better idea...there will be a new LTS out in four months and all
> these problems will go away because it will have the right packages to
> install without ubuntugis.

and after releasing LTS in few months you will use UbuntuGIS again ;-) Ma


-- 
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http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa
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[Qgis-user] php-cgi not found after installing QGIS Server on Windows

[Aitor Gil Martin]

I installed QGIS Server 2.18, apache, QGIS Desktop 2.18 and all their 
dependencies using OSGeo4w x32 setup wizard on a Windows Server 2008 R2 SP1 x64 
virtual server.
After the installation I type localhost on my chrome browser to see the 
Apache's landing page and I am getting the following error:
Not Found
The requested URL /cgi-bin/php-cgi.exe/index.phtml was not found on this server.
I uninstalled and installed everything several times using OSGeo4w but I keep 
getting the same message. Something is not properly installed or missing.
Can anyone give me a clue on what might be happening?
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Re: [Qgis-user] ubuntugis: Broken after update to 2.18.14

[Martin Landa]

Dear Beard,

2017-11-25 12:14 GMT+01:00 Angelos Tzotsos <gcpp.kal...@gmail.com>:
> Also, the hint that the maintenance team (volunteers) is trying to break
> QGIS packages on purpose is totally unacceptable.

instead of attacking volunteers in UbuntuGIS you could help with QGIS
packaging and improve the ecosystem :-)

Ma

-- 
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Re: [Qgis-user] script filegdb to spatial lite

[Martin Bain]

Matt,
Have a look into the ogr2ogr.exe which is installed with QGIS.

It’s a command line program that converts formats.  You could make a batch 
script to get the data you want one layer at a time into a single spatialite 
db.  I’m afraid you got a bit of work to do to figure out the options for your 
input and output formats.

Here’s a sample I found on my hard drive that I did some time ago to get data 
from a SQL Server table into Spatialite, to give you an idea of what’s 
involved.  I don’t remember what all options are :P

C:\OSGeo4W\bin\ogr2ogr.exe -f SQlite "C:\output7.sqlite" 
"MSSQL:server=;database=;trusted_connection=yes;" -sql "SELECT * FROM 
lOT" -a_srs "EPSG:28356" -dsco SPATIALITE=yes -nln "LOT" -nlt PROMOTE_TO_MULTI 
-geomfield SP_GEOMETRY –append

Good luck.

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Matt 
Boyd
Sent: Thursday, 9 November 2017 2:53 PM
To: qgis-user 
Subject: [Qgis-user] script filegdb to spatial lite

Hi QGISers,
I'm working from a corporate dataset, mostly geodatabases located on a network 
drive.
I'd like to make a portable version of the datasets that I use that's updated 
either automaticaly, or whenever I run a script.
I'm not 100% sure how spatialite works. Is everything in a single file 
database? I'd like to just create a script only grabbing the data I specify 
from the network drive and save that locally.
I don't do the database updating so it's only a one way process.

Has anyone done something like this? are there shortcuts?

Thanks
Matt

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[Qgis-user] spatial-temporal data vizualization

[Martin Landa]

Hi,

I am interested at plugins for visualization of spatial temporal data. I found

TimeManager
Temporal/Spectral Profile Tool
Multitemporal and Multivariate data visualisation (only available for QGIS 1.x)

None of them fully meet basic requirements:

1) map canvas + graph view (scatterplot)
2) time slider allowing to define monitoring period (from to)

Map canvas + graph view linked to spatial-temporal dataset (eg. TGRASS [1]).

Are there any other related plugins available?

Thanks, Martin

[1] https://grass.osgeo.org/grass72/manuals/temporalintro.html

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Re: [Qgis-user] Linking coordinates between layers

[Martin Bain]

Hi Simon,
One way would be to add the line layer as a virtual layer with the query text:

SELECT make_line(A.geometry,B.geometry) AS geom, 
st_distance(A.geometry,B.geometry) AS dist
FROM LayerA AS A, LayerB AS B

Just substitute LayerA and LayerB with the names of your layers.

This would create a dynamic layer with one attribute "dist" - the distance 
between the points, and the geometry would be a line connecting the two points. 
 Whenever you move a point the line layer will update, if you labelled the line 
layer with the distance attribute, the label position and text would also 
update.

It gets quite funky if you have multiple points in each layer - there are lines 
drawn between all points.  If there are m points in layer A and n points in 
layer B there will be m*n points in the dynamic layer (a "cross join" in SQL 
parlance).  I imagine performance would be dreadful on layers with many points 
- but not an issue for your use case.

Cheers,
Martin.

-Original Message-
From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of simonc8
Sent: Friday, 13 October 2017 3:22 AM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Linking coordinates between layers

I have two point layers each with a single point in them. I want to draw a line 
joining the points to use to measure the distance apart. I have found various 
plug-ins which allow this, but is there a way I can actually link the point 
coordinates to the line layer so that if I move one of the points the line will 
update automatically?

Grateful for advice.



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not reproduce or distribute any part of this email, disclose its contents to 
any other party or take any action in reliance on it.  If you have received 
this email in error, please contact the sender immediately and delete the 
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Re: [Qgis-user] Point Fill Polygon

[Martin Bain]

Hi Tyler,
Good question.  I couldn’t see how to do it with a “Point Pattern Fill”

But you could do it with a “Geometry Generator” style and a custom function.

Here’s a custom function I wrote to generate a grid of points from the feature 
polygon’s bounding box.

It intersects the point grid with the polygon to return a multipoint object of 
all the points within the polygon.
-
"""
Define new functions using @qgsfunction. feature and parent must always be the
last args. Use args=-1 to pass a list of values as arguments
"""

from qgis.core import *
from qgis.gui import *

@qgsfunction(args='auto', group='Custom')
def pointGrid(step, feature, parent):
geom=feature.geometry()
mbr=feature.geometry().boundingBox()
x1=mbr.xMinimum()
x2=mbr.xMaximum()
y1=mbr.yMinimum()
y2=mbr.yMaximum()
gPnt =[]
while x1mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Tyler 
Veinot
Sent: Saturday, 7 October 2017 5:08 AM
To: QGIS User List >
Subject: [Qgis-user] Point Fill Polygon

Hi;
In a point/symbol fill polygon is there anyway to allow the point/svg symbol to 
extrude over the polygon border and not be cut off. Or only show symbols that 
are completely contained by the polygon? The polygon is only a rough area of 
forest and I am trying to fill it with little tree triangles but I don't want 
symbol slivers at the polygon edge.
Tyler


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this email in error, please contact the sender immediately and delete the 
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[Qgis-user] Station lines determined by point layer

[Martin]

Hi,

I have a layer that contains a number of lines and another layer that contains 
points at various locations along those lines. I want to draw station lines 
across the line next to the point and I also want to add the angle of the 
station line to the point in the point layer so that I can rotate an icon.

I have considered using the station lines plugin as the basis for a new plugin 
but I wondered if someone had already done this or got part of the way there.

All suggestions welcome.

Thanks for any help

Martin


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Re: [Qgis-user] Browser Panel Import

[Martin Bain]

Thank you Alessandro and Richard for your replies, I didn’t know what the 
expected behaviour was.

Thank you Steven for alerting me to the already logged ticket.

From: Steven Evans [mailto:steven.ev...@parkes.nsw.gov.au]
Sent: Wednesday, 6 September 2017 8:55 AM
To: Alessandro Pasotti <apaso...@gmail.com>; Richard Duivenvoorde 
<rich...@duif.net>; Martin Bain <martin.b...@lismore.nsw.gov.au>
Cc: qgis-user@lists.osgeo.org; Shaun Goodenough 
<shaun.goodeno...@lismore.nsw.gov.au>
Subject: RE: [Qgis-user] Browser Panel Import

Hi;
An issues log has been created a couple of months ago.
https://issues.qgis.org/issues/16805

I too fell for the same trap…
I'm encouraging my end users to stick to double click not drag-drop until this 
can be resolved…
Regards
Steve

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of 
Alessandro Pasotti
Sent: Tuesday, 5 September 2017 7:33 PM
To: Richard Duivenvoorde
Cc: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>; Shaun 
Goodenough
Subject: Re: [Qgis-user] Browser Panel Import

On Tue, Sep 5, 2017 at 9:14 AM, Richard Duivenvoorde 
<rdmaili...@duif.net<mailto:rdmaili...@duif.net>> wrote:

While it's nice to impress new users to use this 'drag a file into a
database' feature :-)  I think it's also a 'shoot and run' solution:
either OK or nothing...

Would it be an idea to (sorry dialog haters) have a summary/confirmation
dialog in between this action? Telling the user that 'this file/table
with such columns be copied/moved to that file/table with these columns'?

In this case, it would also have made it possible to stop this overwrite
action?

I don't think it's a good design: if the result of the action is reversible a 
confirm dialog is unnecessary, and we are trying to elminate all unnecessary 
modals.
I'd stick to the confirm dialog for all potentially destructive actions.

I recommend to follow the new geopackage implementation behavior:
- if the drop is on self: abort
- if the drop overrides an existing table: confirm
- if the drop does not override and hence creates a new table: notify on 
success or error

If you've done a wrong drop, you can easily delete the imported layer (at least 
now it's implemented for geopackage and all ogr/gdal, provided it's supported 
by the gdal/ogr provider)

Regards.



Regards,

Richard Duivenvoorde

On 05-09-17 09<tel:05-09-17%2009>:04, Alessandro Pasotti wrote:
> It looks like a bug.
>
> Did you file a ticket?
>
> The expected behavior is that the layer you are dragging is imported
> (without overwriting!) into the destination DB (the drop target).
>
> In case of overwriting, a confirm dialog should appear.
>
> I've recently worked on that for geopackage and I've also added some
> logic to prevent dropping onto itself (that could lead to data loss).
>
> Cheers
>
>
>
> On Tue, Sep 5, 2017 at 8:39 AM, Martin Bain
> <martin.b...@lismore.nsw.gov.au<mailto:martin.b...@lismore.nsw.gov.au> 
> <mailto:martin.b...@lismore.nsw.gov.au<mailto:martin.b...@lismore.nsw.gov.au>>>
> wrote:
>
> Hi List,
>
> I just discovered a brutal feature of the Browser Panel.
>
> __ __
>
> When browsing SQL Server if you happen to click and drag on a table
> then when you release the mouse button a dialog box will pop up
> saying “Import Competed”.
>
> __ __
>
> The table under the cursor when mouse button is released gets
> overwritten with an empty table, without any sort of prompt!
>
> __ __
>
> Within SQL Server I have now revoked DDL permissions from the user
> that did this (and myself).
>
> __ __
>
> But was wondering, Is there a way to prevent or modify this
> behaviour in QGIS?
>
> __ __
>
> Thanks,
>
> Martin.
>
>
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[Qgis-user] Browser Panel Import

[Martin Bain]

Hi List,
I just discovered a brutal feature of the Browser Panel.

When browsing SQL Server if you happen to click and drag on a table then when 
you release the mouse button a dialog box will pop up saying "Import Competed".

The table under the cursor when mouse button is released gets overwritten with 
an empty table, without any sort of prompt!

Within SQL Server I have now revoked DDL permissions from the user that did 
this (and myself).

But was wondering, Is there a way to prevent or modify this behaviour in QGIS?

Thanks,
Martin.

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Re: [Qgis-user] Spatial join with QGIS 2.18.6

[Martin Bain]

I had this issue too - it went away after I uninstalled the "QGIS2compat" 
plugin.

Martin.

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of 
Jan-Eric Oskarsson
Sent: Tuesday, 5 September 2017 11:46 AM
To: 'Parodi Ulderica' <ulderica.par...@regione.liguria.it>; 
qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Spatial join with QGIS 2.18.6

Hi Ulderica!

I don't think you are doing anything wrong.
I tried to install refFunctions to but it seems as the refFunctions plugin is 
broken. Maybe it's not updated for the latest QGIS versions.
I tried to find this Pluginbuilders ,Enrico Ferreguti, email-address, to report 
this problem to him, but can't find it. Maybe someone else can find it.

/Jan-Eric


Från: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] För Parodi Ulderica
Skickat: den 4 september 2017 18:33
Till: 'qgis-user@lists.osgeo.org' 
<qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>>
Ämne: [Qgis-user] Spatial join with QGIS 2.18.6

Today I tried to install the plugin for spatial joins but I can't install the 
needed refFunctions plugin because during installation it tells me that the 
plgin is corrupt. The python message is: cannot import name uic.

What am I doing wrong?
Can you please give me a hint?

Thanks,

Ulderica


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Re: [Qgis-user] Geology symbols

[Martin Bain]

Hi Allan,
I’m not a geologist, but I wonder if you have seen this recent QGIS blog post:
https://ieqgis.wordpress.com/2017/07/14/using-trigonometry-to-place-and-orientate-labels/

I hope it might be of some use.
Cheers,
Martin.

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Allan 
Younger
Sent: Tuesday, 8 August 2017 8:08 PM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Geology symbols

How do you insert mapped structural symbols into a plan?
These have a compass orientation & inclination direction.
These can be any orientation but I cannot see how you can have in one layer.
Only close success I have had putting single symbols in a layer, must be a 
better way.
Allan Younger

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Re: [Qgis-user] Mini dump when adding SQL layers QGIS 2.18.8

[Martin Bain]

Hi Johanna,
2.18.8 was quickly replaced by 2.18.9 I think it had some issues - I don't know 
if any of them relate to your problem.

Are you adding the layers from the browser window or the add layer menu?

Are you using a named ODBC DSN or putting the SQL Server Host details directly 
into QGIS?  I had mini dumps when I was using named ODBC connections.

I'm afraid the only thing I can suggest, if you haven't already tried, is to 
try switching the way you are connecting and adding the layers.

Cheers,
Martin.



From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Johanna 
Botman
Sent: Monday, 26 June 2017 8:18 AM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Mini dump when adding SQL layers QGIS 2.18.8

We have recently upgraded to 2.18.8 and I am struggling with adding data from 
MS SQL. I get a mini dump every time.

I still have 2.14 installed on my Windows 7 64 bit machine and I don't have the 
same issue with that version. Any tips for troubleshooting?





Johanna Botman
Asset & GIS Officer | Melton City Council
[Melton logo colour - low res]   P: 03 9747 7209
   E: johan...@melton.vic.gov.au
   W: melton.vic.gov.au


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Re: [Qgis-user] Joining polylines with overlapping points to 1 polyline with merged points

[Martin Bain]

Hi Jens,
I guess there is more than one way to combine your lines into a single object – 
you could end up with a multipart object (multilinestring) or a single polyline.

Have you tried the Dissolve command?  I quick test for me produced a single 
polyline with no duplicate points from two separate lines.
Cheers,
Martin.

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Jens 
Verwaerde | Natuurpunt CVN
Sent: Tuesday, 13 June 2017 11:49 PM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Joining polylines with overlapping points to 1 polyline 
with merged points

I have a walking route, that I've digitized in 18 polylines, of which the 
endpoint is the exact same location as the beginning point of the next polyline.

When I merge these 18 polylines, the overlapping points stay, unfortunately, 
overlapping points. Visually there's no problem: they behave as 1 polyline, but 
... this causes all sorts of problems:
-- exporting to gpx gives faulty routes
-- combining these polylines to a polygon gives polygon rubbish
-- double (or even more) points stay, although I want them to be joined to one 
point
-- tracing always stops when I reach the end or beginning of a polyline part

How can this be solved?

The only thing that actually worked for me is to make a new layer/shapefile 
("traced.shp") and then manually trace the polylines (using the autotrace). In 
Mapinfo this operation is way much more efficient.


So I'm looking for a way to make 1 polyline with non-overlapping points out of 
a series of polylines in Qgis.



Jens Verwaerde


[http://www.natuurpunt.be/sites/default/files/images/inline/logohandtekening.png]


Website: http://cvn.natuurpunt.be



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Re: [Qgis-user] Selecting displaced symbols

[Martin Bain]

My mum always said I had an overactive imagination  :P  

-Original Message-
From: Nyall Dawson [mailto:nyall.daw...@gmail.com] 
Sent: Thursday, 1 June 2017 9:38 AM
To: Martin Bain <martin.b...@lismore.nsw.gov.au>
Cc: Neumann, Andreas <a.neum...@carto.net>; qgis-user 
<qgis-user@lists.osgeo.org>
Subject: Re: [Qgis-user] Selecting displaced symbols

On 1 June 2017 at 09:26, Martin Bain <martin.b...@lismore.nsw.gov.au> wrote:
> Cool!  Maybe I didn't imagine it after all.

No - you did ;) That commit isn't merged into master, it's sitting orphaned and 
alone and rotting away along with a bunch of other abandoned experiments...

Nyall

>
> -Original Message-
> From: Nyall Dawson [mailto:nyall.daw...@gmail.com]
> Sent: Thursday, 1 June 2017 9:21 AM
> To: Neumann, Andreas <a.neum...@carto.net>
> Cc: Martin Bain <martin.b...@lismore.nsw.gov.au>; qgis-user 
> <qgis-user@lists.osgeo.org>
> Subject: Re: [Qgis-user] Selecting displaced symbols
>
> On 30 May 2017 at 19:11, Neumann, Andreas <a.neum...@carto.net> wrote:
>> Hi Martin,
>>
>> As far as I know, picking is totally independent of the rendering. So 
>> the "Info tool" doesn't know about the displacement renderer. I know 
>> it is not ideal, but it is a technical limitation and there are no known 
>> workarounds.
>
> Well - there's this half finished commit I wrote but never merged:
> https://github.com/nyalldawson/QGIS/commit/2405c9cc2c9d07bd0975d60ce36
> db5c5e8d8b612
>
> I can't remember exactly why I didn't complete this. I think it was written 
> during feature freeze once and I never got around to verifying that it didn't 
> cause regressions in the rendering speed after freeze was lifted. From memory 
> it worked well for info tool and rotate point symbol tool.
>
> From the commit message:
>
> "Register rendered point features into a spatial index so that we can later 
> retrieve features by their actual rendered location.
> (The rendered location may be different in numerous circumstances, eg when 
> using the displacement renderer, or when marker symbols have an offset set) 
> This index could then be used to later retrieve the features for a specific 
> canvas coordinate, for use eg in identify tool, rotate point symbols, etc."
>
> Theoretically this could be cleaned up, finished off and tested, and then 
> later extended to apply to selections also.
>
> Nyall
>
> This email is intended for the named recipient only.  The information it 
> contains may be confidential.  If you are not the intended recipient you must 
> not reproduce or distribute any part of this email, disclose its contents to 
> any other party or take any action in reliance on it.  If you have received 
> this email in error, please contact the sender immediately and delete the 
> message.

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Re: [Qgis-user] Selecting displaced symbols

[Martin Bain]

Cool!  Maybe I didn't imagine it after all.

-Original Message-
From: Nyall Dawson [mailto:nyall.daw...@gmail.com] 
Sent: Thursday, 1 June 2017 9:21 AM
To: Neumann, Andreas <a.neum...@carto.net>
Cc: Martin Bain <martin.b...@lismore.nsw.gov.au>; qgis-user 
<qgis-user@lists.osgeo.org>
Subject: Re: [Qgis-user] Selecting displaced symbols

On 30 May 2017 at 19:11, Neumann, Andreas <a.neum...@carto.net> wrote:
> Hi Martin,
>
> As far as I know, picking is totally independent of the rendering. So 
> the "Info tool" doesn't know about the displacement renderer. I know 
> it is not ideal, but it is a technical limitation and there are no known 
> workarounds.

Well - there's this half finished commit I wrote but never merged:
https://github.com/nyalldawson/QGIS/commit/2405c9cc2c9d07bd0975d60ce36db5c5e8d8b612

I can't remember exactly why I didn't complete this. I think it was written 
during feature freeze once and I never got around to verifying that it didn't 
cause regressions in the rendering speed after freeze was lifted. From memory 
it worked well for info tool and rotate point symbol tool.

From the commit message:

"Register rendered point features into a spatial index so that we can later 
retrieve features by their actual rendered location.
(The rendered location may be different in numerous circumstances, eg when 
using the displacement renderer, or when marker symbols have an offset set) 
This index could then be used to later retrieve the features for a specific 
canvas coordinate, for use eg in identify tool, rotate point symbols, etc."

Theoretically this could be cleaned up, finished off and tested, and then later 
extended to apply to selections also.

Nyall

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Re: [Qgis-user] Snapping: Move Features vs Node Tool

[Martin Bain]

Hi Randy,

I've come to accept that's just the way it is.  It would be nice if the move 
tool did snapping.  I guess it might be tricky to implement - with the node 
tool the cursor position and node being moved are one and the same, but with 
the move tool that’s not always the case.

As an aside are you using the wonderful CAD Node Tool plugin, 
https://github.com/qgis/QGIS-Enhancement-Proposals/issues/69 ?  The built node 
tool became quite sluggish for me after QGIS 2.8 for some reason.  The plugin 
is much more fluid and the best thing is it does topological editing across 
layers.  Its not perfect though - you can't select a sequence of nodes and move 
them at the same time.

Cheers,
Martin.


-Original Message-
From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Randal 
Hale
Sent: Tuesday, 30 May 2017 11:53 PM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Snapping: Move Features vs Node Tool

A question. 

In an attempt to help a client I'm doing some data cleanup - which is good. I 
spend too much time talking and not enough doing. I need to snap points to the 
endpoints of lines. If I set snapping up and use the move features tool the 
point doesn't snap to the line. If I move the point using the node tool the 
point snaps to the line. 

I've been looking for an option or something to change. I'm not seeing one. Is 
this expected behavior? To me it would make more sense for both tools to snap 
data - but I may be missing something. If I add data, the data snaps as I would 
expect it. The good people I'm helping immediately started moving data and it 
didn't snap - and I've instructed them to use the node tool to make the edits. 

QGIS 2.18.9 - Linux

Thanks
Randy


--
Randal Hale
rjh...@northrivergeographic.com
https://www.northrivergeographic.com
(423) 653-3611
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Re: [Qgis-user] Selecting displaced symbols

[Martin Bain]

Thanks for the discussion gentlemen.

I too think your idea is a good one Karl_Magnus.  Andreas, thanks for your 
suggestion with the info tool.  I set the mode to “Top Down stop at first” long 
ago and hadn’t changed it since.  Layer Choice works well in this situation and 
I didn’t realise the individual symbols are highlighted as you hover over the 
list.

Cheers,
Martin.


From: Neumann, Andreas [mailto:a.neum...@carto.net]
Sent: Tuesday, 30 May 2017 9:40 PM
To: Karl Magnus Jönsson <karl-magnus.jons...@kristianstad.se>
Cc: Martin Bain <martin.b...@lismore.nsw.gov.au>; qgis-user@lists.osgeo.org
Subject: Re: SV: [Qgis-user] Selecting displaced symbols


Hi Karl-Magnus,

I think this is a good idea. It could either be a separate selection mode (we 
already have different modes for selection on the drop-down button) or it could 
be toggled with a keyboard combination on the existing "click" mode. Can you 
open a feature request at https://issues.qgis.org/<http://issues.qgis.org/> ?

Greetings,

Andreas

On 2017-05-30 12:00, Karl Magnus Jönsson wrote:
Hi!
When talking about this. I've had a thought of improvement of the select tool. 
When there is several features in the same (or almost the same) location in one 
layer it is difficult to select one particular feature. Could we have the same 
functionality with select tool as with identify? Right click gets you a 
pull-down menu with potential features and you can select one from the list 
that gets selected. Understandable? Has this already been thought of? A 
workaround is to use the identify tool with right click. At the bottom of the 
list you can open the attribute table and select the desired features from the 
table. Works but one step more.

Karl-Magnus

Från: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] För Neumann, Andreas
Skickat: den 30 maj 2017 11:11
Till: Martin Bain
Kopia: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Ämne: Re: [Qgis-user] Selecting displaced symbols


Hi Martin,

As far as I know, picking is totally independent of the rendering. So the "Info 
tool" doesn't know about the displacement renderer. I know it is not ideal, but 
it is a technical limitation and there are no known workarounds.

You can, however, display the central point (with a separate symbol) so the 
user knows where to pick. Also, you can easily access each individual point by 
changing the identify mode to "Layer choice" - where you get a pull-down menu 
and you can identify each individual point by its "display attribute".

Maybe a dev knows a solution to this problem - but currently I think there are 
no known workarounds.

Andreas

On 2017-05-30 03:39, Martin Bain wrote:
Hi,
I have the familiar situation of a layer with multiple points at the same 
coordinates.  The points have data defined SVG symbols

I'm using the Point Displacement renderer to overcome having overlapping 
symbols.  This definitely makes for an improved appearance.

However if you want to use the info tool or the select tool you cant click on 
the displaced symbol.  You can only select all points via the central point.

Is there a trick to select a point by its offset symbol instead of the true 
coordinates?  I have half a memory of reading something about this once before 
but maybe I imagined it :P

I would prefer to leave the points in their original position – the data is of 
traffic accidents, provided by the state government.

Thank you,
Martin.

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email in error, please contact the sender immediately and delete the message.


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[Qgis-user] Selecting displaced symbols

[Martin Bain]

Hi,
I have the familiar situation of a layer with multiple points at the same 
coordinates.  The points have data defined SVG symbols

I'm using the Point Displacement renderer to overcome having overlapping 
symbols.  This definitely makes for an improved appearance.

However if you want to use the info tool or the select tool you cant click on 
the displaced symbol.  You can only select all points via the central point.

Is there a trick to select a point by its offset symbol instead of the true 
coordinates?  I have half a memory of reading something about this once before 
but maybe I imagined it :P

I would prefer to leave the points in their original position - the data is of 
traffic accidents, provided by the state government.

Thank you,
Martin.

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contains may be confidential.  If you are not the intended recipient you must 
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[Qgis-user] dgn V8 with QGIS

[Martin Schultze]

Hello everybody!

I tried to open dgn V8 file using QGIS 2.18.8 with gdal 2.2.0 but 
returned error message not supported data type...

What did I wrong?

Best regards
Martin
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Re: [Qgis-user] Creating Excel from processing toolbox

[Martin Bain]

Hi Pat,
Not sure if this is what you are looking for, but the processing toolbox 
contains the OGR Convert format algorithm.  The output formats include CSV and 
XLSX.
Cheers,
Martin.

From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of 
ph...@gmx.de
Sent: Wednesday, 26 April 2017 6:24 PM
To: QGIS User List <qgis-user@lists.osgeo.org>
Subject: [Qgis-user] Creating Excel from processing toolbox

Hello

i am writing an own script for processing toolbox and would like
to write my final data to an Excel sheet.

There are several libraries outside for Python to do that but from
your point of view what is the best for?
Or is there already on in QGIS i am not aware of? I refer to an
Excel library to use within of Python.
QGIS itself has it already as i know

thank you

pat


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