[Qgis-user] Refreshing Elevation Profile View after Loading Data using .loadLayerDefinition
Dear list,
I am using QgsLayerDefinition().loadLayerDefinition() to load a QGIS-Layer into
QGIS 3.38.
Using "Log = QgsLayerDefinition().loadLayerDefinition("pathtofile/xxx.qlr",
QgsProject.instance(),QgsProject.instance().layerTreeRoot())" in a Script or in
the Python-Console works well to open some elevation data into the layer table
and the main view.
But if I want to see the same Data in an Elevation-Profile-View the dataset
does not show up in an already opened Elevation-Profile-View. I have to close
and reopen the Elevation Profile View to see the loaded Dataset.
To reproduce:
* Start QGIS
* Load any Elevation Data and export a qlr-file for the
Elevation-Dataset. Unload (Close) the Dataset again.
* Load another Elevation Dataset
* Open an Elevation-Profile-View (View - Elevation-Profile) and draw a
Line - you can see the profile plot for the loaded dataset.
* Keep the Elevation-Profile-View opened and Run "Log =
QgsLayerDefinition().loadLayerDefinition("pathtofile/xxx.qlr",
QgsProject.instance(),QgsProject.instance().layerTreeRoot())" in the python
console - adjust the path to your saved .qlr-File). The Elevation-Dataset is
loaded to the Layer-List und to the Main Map-View but not loaded to the
Elevation-Profile-View and not to the Layer-List of the Elevation-Profile.
Is there anything I can do to "refresh" the Elevation-Profile-View and the
Layer List of the Elevation Profile?
Thanks
Best regards
Peter
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[Qgis-user] Showing 2D-Data in QGIS Elevation Profile View QGIS 3.38
Hallo, In the Elevation-settings of the Layer-Properties of a 3D-Shapefile (shapeZ) I can select one of the 3 Clamping-Types "Clamped to Terrain", "Relative to Terrain" or "Absolute". In the Elevation-settings of the Layer-Properties of a 2D-Shapefile I can only select one of 2 Clamping-Types "Clamped to Terrain" or "Absolute". I want to draw 2D-Line Features (in my case Contour-Lines) "draped" on the Terrain-Line in the Elevation Profile View. Each time the Profile-Line crosses a Contour-Line a Point-Symbol should be drawn "on" the Profile-Line in the Elevation Profile View. * When I select "Clamped to Terrain" the Point-Symbol is drawn at Elevation 0m * When I select "Absolute" the Point-Symbol is again drawn at Elevation 0m * For 2D-Data I cannot select "Relative to Terrain" In my Point of View "Clamped to Terrain" should do the trick but it does not... Is there anyone out there who can help or at least is able to replicate the behavior? Regards Peter ___ QGIS-User mailing list QGIS-User@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] passing parameters to QGIS Python-Script started via Command Line
Hi everyone, My goal: I want to open QGIS using the Command-Line, load a specific project, select specific features and zoom to the selected features. What sounds rather difficult is actually mostly solvable using the following: "C:\Program Files\QGIS 3.16\bin\qgis-ltr-bin.exe" -p "d:\standardebenen.qgs" --code myscript.py This opens QGIS with the Project d:\standardebenen.qgs and after that it runs the script "myscript.py". Within the scrip I can do everything what I can do in a Python-script, so there I can select some features in a layer and show that selection. But this selections are "hard-coded" in the script, I cannot pass over these parameters to the myscript.py. In "Pure Python" I can pass parameters to a Python Script using "python myscript.py arg1 arg2 arg3". This seems to be not working in the QGIS-Command-Line as the parameters are interpreted as "layers to load". Am I right with my analysis? One workaround is to write the parameters to al file and use this file within the myscript.py to define the selections. But this is very unhandy... Are there any ideas from any QGIS-Expert to solve my problem? If this cannot be solved in the current version of QGIS is one of the developers willing to get in contact with me to make an offer the implement this feature ? Thanks Peter ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] [QGIS-Developer] Memory Leak / Slowdown?
Hi Matthias,
they both do not work…
So I will make a Ticket I think…
Thanks anyway Matthias for your great support!
Best greetings
Peter
Von: Matthias
Gesendet: Montag, 20. April 2020 17:21
An: Drexel Peter ; qgis-user@lists.osgeo.org;
qgis-develo...@lists.osgeo.org
Betreff: Re: AW: AW: [QGIS-Developer] Memory Leak / Slowdown?
Hi Peter,
Happy you found a way.
Can you try proposals number 2 and 3 from my previous email? If they do not
help, please open a ticket.
Bests
Matthias
20 April 2020 17:14 Drexel Peter
mailto:peter.dre...@vorarlberg.at>> wrote:
Hi Matthias,
Thanks to your hints I found a way:
The script also works if I do not add the Layer to the Project but directly
save the Sld-Style. So I can also skip clearing the QgsProject.instance.
vlayer=QgsVectorLayer (pfad ,sfileOhneExt,"ogr")
#QgsProject.instance().addMapLayer(vlayer)
vlayer.saveSldStyle (sldpfad)
#QgsProject.instance().clear()
But besides my personal “success”: including the 2 Lines should not lead to
rising time /memory consumption or am I wrong?
Should I make a ticket?
Peter
Von: Matthias mailto:matth...@opengis.ch>>
Gesendet: Montag, 20. April 2020 15:40
An: Drexel Peter
mailto:peter.dre...@vorarlberg.at>>;
qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>;
qgis-develo...@lists.osgeo.org<mailto:qgis-develo...@lists.osgeo.org>
Betreff: Re: AW: [QGIS-Developer] Memory Leak / Slowdown?
Hi Peter,
It's possible that a part of the cleanup only happens on the next event loop
run.
Questions / things to try:
- Do you really need to add them to the project or is a layer without adding it
to the project good enough for your purpose?
- Can you run this in batches of ~100 (or even 1) each and then trigger the
next batch on a new event loop invocation, e.g. by using QTimer.singleShot()
- The easiest thing would be calling QgsApplication.processEvents(), but be
warned that using this is known for introducing instabilities, depending on the
context in which it is called
Matthias
20 April 2020 15:11 Drexel Peter
mailto:peter.dre...@vorarlberg.at>> wrote:
Hi Matthias,
yes, the same with a clean new profile.
4 iterations per second at the begining, 1 very 6 seconds at the end…
…
QGIS-Version
3.12.1-București
QGIS-Codeversion
121cc00ff0<https://github.com/qgis/QGIS/commit/121cc00ff0>
Kompiliert gegen Qt
5.11.2
Laufendes Qt
5.11.2
Kompiliert mit GDAL/OGR
3.0.4
Läuft mit GDAL/OGR
3.0.4
Kompiliert mit GEOS
3.8.1-CAPI-1.13.3
Läuft mit GEOS
3.8.1-CAPI-1.13.3
Kompiliert mit SQLite
3.29.0
Läuft mit SQLite
3.29.0
PostgreSQL-Client-Version
11.5
SpatiaLite-Version
4.3.0
QWT-Version
6.1.3
QScintilla2-Version
2.10.8
Kompiliert mit PROJ
6.3.1
Läuft mit PROJ
Rel. 6.3.1, February 10th, 2020
BS-Version
Windows 10 (10.0)
Aktive Python-Erweiterungen
db_manager;
MetaSearch;
processing
Von: Matthias Kuhn mailto:matth...@opengis.ch>>
Gesendet: Montag, 20. April 2020 12:50
An: Drexel Peter
mailto:peter.dre...@vorarlberg.at>>;
qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Betreff: Re: [QGIS-Developer] Memory Leak / Slowdown?
Hi Peter,
Did you try this on a clean new profile with no plugins installed?
Bests
Matthias
On 4/20/20 11:08 AM, Drexel Peter wrote:
Hi,
I use a Python-Script to load all shapefiles in a directory tree one by one and
export the sld-files.
It works fine, but slows down incredible after ~100 files.
So I tried the following barebone script with just the essentials (load
shapefile, add it to the map canvas, remove it again and then clear the
project) in a loop and I get the same behavior…
from datetime import datetime
for i in range(1, 1000):
vlayer=QgsVectorLayer ("aShapeFile.shp" ,"run " + str(i) + "
at " + datetime.now().strftime('%H:%M:%S') ,"ogr")
QgsProject.instance().addMapLayer(vlayer)
QgsProject.instance().removeMapLayer(vlayer.id())
QgsProject.instance().clear()
Same result, the Script slows down after every iteration in the loop AND
QGIS-memory consumption goes up!
Do I need to do some garbage cleaning / what am I doing wrong / is this a
Memory leak?
Thanks everybody for any hints / help!
Peter
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Re: [Qgis-user] [QGIS-Developer] Memory Leak / Slowdown?
Hi Matthias,
Thanks to your hints I found a way:
The script also works if I do not add the Layer to the Project but directly
save the Sld-Style. So I can also skip clearing the QgsProject.instance.
vlayer=QgsVectorLayer (pfad ,sfileOhneExt,"ogr")
#QgsProject.instance().addMapLayer(vlayer)
vlayer.saveSldStyle (sldpfad)
#QgsProject.instance().clear()
But besides my personal “success”: including the 2 Lines should not lead to
rising time /memory consumption or am I wrong?
Should I make a ticket?
Peter
Von: Matthias
Gesendet: Montag, 20. April 2020 15:40
An: Drexel Peter ; qgis-user@lists.osgeo.org;
qgis-develo...@lists.osgeo.org
Betreff: Re: AW: [QGIS-Developer] Memory Leak / Slowdown?
Hi Peter,
It's possible that a part of the cleanup only happens on the next event loop
run.
Questions / things to try:
- Do you really need to add them to the project or is a layer without adding it
to the project good enough for your purpose?
- Can you run this in batches of ~100 (or even 1) each and then trigger the
next batch on a new event loop invocation, e.g. by using QTimer.singleShot()
- The easiest thing would be calling QgsApplication.processEvents(), but be
warned that using this is known for introducing instabilities, depending on the
context in which it is called
Matthias
20 April 2020 15:11 Drexel Peter
mailto:peter.dre...@vorarlberg.at>> wrote:
Hi Matthias,
yes, the same with a clean new profile.
4 iterations per second at the begining, 1 very 6 seconds at the end…
…
QGIS-Version
3.12.1-București
QGIS-Codeversion
121cc00ff0<https://github.com/qgis/QGIS/commit/121cc00ff0>
Kompiliert gegen Qt
5.11.2
Laufendes Qt
5.11.2
Kompiliert mit GDAL/OGR
3.0.4
Läuft mit GDAL/OGR
3.0.4
Kompiliert mit GEOS
3.8.1-CAPI-1.13.3
Läuft mit GEOS
3.8.1-CAPI-1.13.3
Kompiliert mit SQLite
3.29.0
Läuft mit SQLite
3.29.0
PostgreSQL-Client-Version
11.5
SpatiaLite-Version
4.3.0
QWT-Version
6.1.3
QScintilla2-Version
2.10.8
Kompiliert mit PROJ
6.3.1
Läuft mit PROJ
Rel. 6.3.1, February 10th, 2020
BS-Version
Windows 10 (10.0)
Aktive Python-Erweiterungen
db_manager;
MetaSearch;
processing
Von: Matthias Kuhn mailto:matth...@opengis.ch>>
Gesendet: Montag, 20. April 2020 12:50
An: Drexel Peter
mailto:peter.dre...@vorarlberg.at>>;
qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org>
Betreff: Re: [QGIS-Developer] Memory Leak / Slowdown?
Hi Peter,
Did you try this on a clean new profile with no plugins installed?
Bests
Matthias
On 4/20/20 11:08 AM, Drexel Peter wrote:
Hi,
I use a Python-Script to load all shapefiles in a directory tree one by one and
export the sld-files.
It works fine, but slows down incredible after ~100 files.
So I tried the following barebone script with just the essentials (load
shapefile, add it to the map canvas, remove it again and then clear the
project) in a loop and I get the same behavior…
from datetime import datetime
for i in range(1, 1000):
vlayer=QgsVectorLayer ("aShapeFile.shp" ,"run " + str(i) + "
at " + datetime.now().strftime('%H:%M:%S') ,"ogr")
QgsProject.instance().addMapLayer(vlayer)
QgsProject.instance().removeMapLayer(vlayer.id())
QgsProject.instance().clear()
Same result, the Script slows down after every iteration in the loop AND
QGIS-memory consumption goes up!
Do I need to do some garbage cleaning / what am I doing wrong / is this a
Memory leak?
Thanks everybody for any hints / help!
Peter
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Re: [Qgis-user] [QGIS-Developer] Memory Leak / Slowdown?
Hi Matthias,
yes, the same with a clean new profile.
4 iterations per second at the begining, 1 very 6 seconds at the end…
…
QGIS-Version
3.12.1-București
QGIS-Codeversion
121cc00ff0<https://github.com/qgis/QGIS/commit/121cc00ff0>
Kompiliert gegen Qt
5.11.2
Laufendes Qt
5.11.2
Kompiliert mit GDAL/OGR
3.0.4
Läuft mit GDAL/OGR
3.0.4
Kompiliert mit GEOS
3.8.1-CAPI-1.13.3
Läuft mit GEOS
3.8.1-CAPI-1.13.3
Kompiliert mit SQLite
3.29.0
Läuft mit SQLite
3.29.0
PostgreSQL-Client-Version
11.5
SpatiaLite-Version
4.3.0
QWT-Version
6.1.3
QScintilla2-Version
2.10.8
Kompiliert mit PROJ
6.3.1
Läuft mit PROJ
Rel. 6.3.1, February 10th, 2020
BS-Version
Windows 10 (10.0)
Aktive Python-Erweiterungen
db_manager;
MetaSearch;
processing
Von: Matthias Kuhn
Gesendet: Montag, 20. April 2020 12:50
An: Drexel Peter ; qgis-user@lists.osgeo.org
Betreff: Re: [QGIS-Developer] Memory Leak / Slowdown?
Hi Peter,
Did you try this on a clean new profile with no plugins installed?
Bests
Matthias
On 4/20/20 11:08 AM, Drexel Peter wrote:
Hi,
I use a Python-Script to load all shapefiles in a directory tree one by one and
export the sld-files.
It works fine, but slows down incredible after ~100 files.
So I tried the following barebone script with just the essentials (load
shapefile, add it to the map canvas, remove it again and then clear the
project) in a loop and I get the same behavior…
from datetime import datetime
for i in range(1, 1000):
vlayer=QgsVectorLayer ("aShapeFile.shp" ,"run " + str(i) + "
at " + datetime.now().strftime('%H:%M:%S') ,"ogr")
QgsProject.instance().addMapLayer(vlayer)
QgsProject.instance().removeMapLayer(vlayer.id())
QgsProject.instance().clear()
Same result, the Script slows down after every iteration in the loop AND
QGIS-memory consumption goes up!
Do I need to do some garbage cleaning / what am I doing wrong / is this a
Memory leak?
Thanks everybody for any hints / help!
Peter
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[Qgis-user] Memory Leak / Slowdown?
Hi,
I use a Python-Script to load all shapefiles in a directory tree one by one and
export the sld-files.
It works fine, but slows down incredible after ~100 files.
So I tried the following barebone script with just the essentials (load
shapefile, add it to the map canvas, remove it again and then clear the
project) in a loop and I get the same behavior...
from datetime import datetime
for i in range(1, 1000):
vlayer=QgsVectorLayer ("aShapeFile.shp" ,"run " + str(i) + "
at " + datetime.now().strftime('%H:%M:%S') ,"ogr")
QgsProject.instance().addMapLayer(vlayer)
QgsProject.instance().removeMapLayer(vlayer.id())
QgsProject.instance().clear()
Same result, the Script slows down after every iteration in the loop AND
QGIS-memory consumption goes up!
Do I need to do some garbage cleaning / what am I doing wrong / is this a
Memory leak?
Thanks everybody for any hints / help!
Peter
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[Qgis-user] QGIS 3, Import a project into an existing / or the open project, Python
Hi, I need some advice on how to import an existing project into my open project using Python in Qgis 3. I am looking for something similar to https://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/loadproject.html, but the script should add the content of a .qgs-File (the layers, structure, styling etc) to some already loaded layers/groups in a Qgis-Session. Any ideas? Thanks Peter ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] QGIS3 Processing Clip
Thanks to both for the answers,
It works now.
Sadly I have to accept the geometry errors at the moment, otherwise I would
have to fix hundreds of 3. party-files…
Greetings,
Peter
__
Mag. Peter Drexel
Landesamt für Vermessung und
Geoinformation<http://vogis.cnv.at/atlas3/init.aspx?hotspot=digitaler_atlas_vorarlberg%7cbasiskarten_und_bilder%7c1%3a1843%7c-55745.5870030623%7c233293.767395111%7chotspot0.gif%7cLandesamt+f%u00fcr+Vermessung+und+Geoinformation>
Johannitergasse 6 A-6800 Feldkirch
Tel: +43(0)5522/75482-60222, Fax: +43(0)5522/75482-6
E-Mail: peter.dre...@vorarlberg.at<mailto:peter.dre...@vorarlberg.at>,
http://www.vorarlberg.at/lva
Rechtsverbindlichen Schriftverkehr (z.B. Anträge Rechtsmittel) richten Sie an:
E-Mail:
landesvermessungs...@vorarlberg.at<mailto:landesvermessungs...@vorarlberg.at>,
Fax: +43(0)5522/75482-6
Von: Andreas Neumann [mailto:a.neum...@carto.net]
Gesendet: Freitag, 23. März 2018 12:53
An: Drexel Peter
Cc: qgis-user@lists.osgeo.org
Betreff: Re: [Qgis-user] QGIS3 Processing Clip
Hi Peter,
You can find this setting in "Settings" --> "Options" --> "Processing" -->
"General" --> "Invalid features filtering".
However, it is probably more advisable to fix the geometry errors, if it is
feasible. The "Geometry checker" core plugin can help with this task.
Greetings,
Andreas
On 2018-03-23 11:30, Drexel Peter wrote:
Hi all,
In QGIS 3.0 I use native:clip in processing to clip a Shapefile with another
shapefile.
The Import-Shapefile contains some invalid polygons so I get an error
Processing algorithm…
AlgorithmDialog
Input parameters:
{ 'INPUT' :
'V:/Geodaten/Wasser/Einzugsgebiete/Vlbg_Umgebung/Einzugsgebiete_FGW/ezg_gesamt1_bearbeitet_3D_name.shp',
'OVERLAY' : 'C:/temp/QGIS3/Clip-Maske.shp', 'OUTPUT' : 'memory:' }
Feature (0) has invalid geometry. Please fix the geometry or change the
Processing setting to the "Ignore invalid input features" option.
Execution failed after 0.35 seconds
Loading resulting layers
Algorithm 'Clip' finished
__
In the Log-section of the Clip-Tool.
But where can change the setting to “Ignore invalid input features”?
Thanks
Peter
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[Qgis-user] QGIS3 Processing Clip
Hi all,
In QGIS 3.0 I use native:clip in processing to clip a Shapefile with another
shapefile.
The Import-Shapefile contains some invalid polygons so I get an error
Processing algorithm...
AlgorithmDialog
Input parameters:
{ 'INPUT' :
'V:/Geodaten/Wasser/Einzugsgebiete/Vlbg_Umgebung/Einzugsgebiete_FGW/ezg_gesamt1_bearbeitet_3D_name.shp',
'OVERLAY' : 'C:/temp/QGIS3/Clip-Maske.shp', 'OUTPUT' : 'memory:' }
Feature (0) has invalid geometry. Please fix the geometry or change the
Processing setting to the "Ignore invalid input features" option.
Execution failed after 0.35 seconds
Loading resulting layers
Algorithm 'Clip' finished
__
In the Log-section of the Clip-Tool.
But where can change the setting to "Ignore invalid input features"?
Thanks
Peter
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