From andreaerdna at libero.it Wed Oct 1 11:34:40 2025 From: andreaerdna at libero.it (Andrea Giudiceandrea) Date: Wed, 1 Oct 2025 20:34:40 +0200 Subject: [Qgis-user] Incomplete German Localization in QGIS 3.44.2/3.44.3 Message-ID: <348e1200-2364-4f1b-9101-7f687fe0f04e@libero.it> > Thomas W?lk thomas.woelk at gmail.com > Tue Sep 30 07:42:45 PDT 2025 > I am using QGIS 3.44.2/3.44.3 with the language set to German and have > noticed that localization is incomplete in various parts of the > application. Some terms and menu items are displayed in English, even > though the system language is correctly set to German. Hi Thomas, such issue is probably the same known issue already previously reported various times for various languages but unfortunately not yet fixed. Please see https://github.com/qgis/QGIS/issues/61291. Regards. Andrea From dejardinjp at gmail.com Sat Oct 4 08:38:36 2025 From: dejardinjp at gmail.com (dejardinjp at gmail.com) Date: Sat, 4 Oct 2025 17:38:36 +0200 Subject: [Qgis-user] py expressions don't load automatically in the Custom section Message-ID: <01f301dc3544$f32c7ea0$d9857be0$@gmail.com> Hi All, I've a few Python expressions encoded through the function editor within the field calculator. As I save and load them, they appear in the "Custom" section, but if I restart QGis the complete Custom section disappears from the panel and I've to reload the expressions. I tried to manage it with a startup.py or __init__.py, but it failed . Any idea ? THX JP -------------- next part -------------- An HTML attachment was scrubbed... URL: From andreaerdna at libero.it Sat Oct 4 10:31:18 2025 From: andreaerdna at libero.it (Andrea Giudiceandrea) Date: Sat, 4 Oct 2025 19:31:18 +0200 Subject: [Qgis-user] py expressions don't load automatically in the Custom section Message-ID: <63d8d017-d965-43f8-825f-2441ccdc50a5@libero.it> Hi JP, the issue doesn't occur on my Windows 10 system running QGIS LTR 3.40.11. The custom functions can be either saved in the QGIS project or in the QGIS user profile (in the \python\expressions\ folder inside the current QGIS user profile folder). In the former case, the functions are automatically loaded when such QGIS project is opened, while in the latter case, the functions are automatically loaded when such QGIS user profile is used. Normally there is no need to use any startup.py or __init__.py file. Are you sure you are using the right QGIS project file or QGIS user profile in which the functions were saved? It would be useful if you indicated the exact QGIS version and Operative System name and version used and exact step-by-step procedure you follow to create and save the functions. Regards. Andrea > dejardinjp at gmail.com dejardinjp at gmail.com > Sat Oct 4 08:38:36 PDT 2025 > I've a few Python expressions encoded through the function editor within the > field calculator. > As I save and load them, they appear in the "Custom" section, but if I > restart QGis the complete Custom section disappears from the panel and I've > to reload the expressions. > > I tried to manage it with a startup.py or __init__.py, but it failed . Any > idea ? THX From laurent.celati at gmail.com Sun Oct 5 11:18:22 2025 From: laurent.celati at gmail.com (celati Laurent) Date: Sun, 5 Oct 2025 20:18:22 +0200 Subject: [Qgis-user] Qgis Form // Attached tool / Big performance problem for table opening Message-ID: Dear all, I work with Windows with Qgis 3.34.13-Prizren. I have a Qgis project destined to be shipped on a tablet for the field (Qfield). The project contains a polygonal layer of 3427 objects (file shp). There are many columns with different types. There also relational values / joins setted for this form. So the project also includes .csv files (for relational values). The problem : the opening of this table attribute takes up to 40 seconds. I spent time to identify where the problem may come from. At one time I thought for joins/relational values. Or also CSV format. As we can see here : https://gis.stackexchange.com/questions/423054/what-is-slowing-qgis-the-most-when-opening-form After several hours of investigation, the source of the problem seems to come from 4 columns (string) for strore the pictures. After removing those 4 columns of the form, the opening time of the table become normal. I have tried to "play" with the parameter for this form attached tool, (as for example relative/absolute path size of the images, etc.). But in vain. Have people ever been confronted with this problem/limitation/problem of table opeining performance regarding the attribute form design? Linking with attached tool for image/picture ? For information, a SS of the interface : [image: image.png] [1]: https://gis.stackexchange.com/questions/423054/what-is-slowing-qgis-the-most-when-opening-form [2]: https://i.sstatic.net/28yZWYM6.jpg -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image.png Type: image/png Size: 67779 bytes Desc: not available URL: From dejardinjp at gmail.com Mon Oct 6 00:53:51 2025 From: dejardinjp at gmail.com (dejardinjp at gmail.com) Date: Mon, 6 Oct 2025 09:53:51 +0200 Subject: [Qgis-user] py expressions don't load automatically in the Custom section In-Reply-To: References: Message-ID: <029601dc3696$5b444f70$11ccee50$@gmail.com> Hi Andrea, I?m using 3.40.9 on Windows 11 24H2. I tried both solutions (Function file and function project), but with same issue. I can see the Custom section if I load the function, but it doesn?t remain if I just restart QGis (with default profile ). What I can add is I keep several releases of QGis installed (I also tried with 3.28 without success), but may be it brings confusion Rgds, JP -----Message d'origine----- De?: QGIS-User De la part de qgis-user-request at lists.osgeo.org Envoy??: dimanche 5 octobre 2025 20:19 ??: qgis-user at lists.osgeo.org Objet?: QGIS-User Digest, Vol 236, Issue 1 Send QGIS-User mailing list submissions to qgis-user at lists.osgeo.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.osgeo.org/mailman/listinfo/qgis-user or, via email, send a message with subject or body 'help' to qgis-user-request at lists.osgeo.org You can reach the person managing the list at qgis-user-owner at lists.osgeo.org When replying, please edit your Subject line so it is more specific than "Re: Contents of QGIS-User digest..." Today's Topics: 1. QGIS2web crash (Stephen Sacks) 2. crucial typo (Stephen Sacks) 3. Re: QGIS2web crash (Andreas Neumann) 4. Dissolve keeping all attributes values (concatenation/aggregation)? (celati Laurent) 5. Incomplete German Localization in QGIS 3.44.2/3.44.3 (Thomas W?lk) 6. Re: Dissolve keeping all attributes values (concatenation/aggregation)? (chris hermansen) 7. Re: Dissolve keeping all attributes values (concatenation/aggregation)? (celati Laurent) 8. Re: Incomplete German Localization in QGIS 3.44.2/3.44.3 (Andrea Giudiceandrea) 9. py expressions don't load automatically in the Custom section (dejardinjp at gmail.com) 10. Re: py expressions don't load automatically in the Custom section (Andrea Giudiceandrea) 11. Qgis Form // Attached tool / Big performance problem for table opening (celati Laurent) ---------------------------------------------------------------------- Message: 1 Date: Mon, 29 Sep 2025 18:42:00 -0400 From: Stephen Sacks To: "forum, QGIS forum" Subject: [Qgis-user] QGIS2web crash Message-ID: Content-Type: text/plain; charset="utf-8"; Format="flowed" QGIS2web problem. My map has two layers (trees and shrubs).? If both layers use a single svg marker everything looks as it should, both on my desktop and when I export to the web (Leaflet).? But if one layer (shrubs) uses categorized? svg markers then qgis2web crashes when I click Export (see attached error message). The crash occurs even if all six categories use the same svg file (which is the same svg which works smoothly in the single marker, i.e., not-categorized, case). The error message says can't find 'chosen/ShrubPoss1_green.svg' , which is a reference to a folder and file which I had used earlier but don't use now.? I recreated both the folder and the file just so they can satisfy some software bug that failed to clear some buffer, but that does solve my problem. I'm using QGIS2web(version 3.29.0) and running QGIS v3.40.10 Bratislava on Windows 11. Any advice would be most welcome.? Thanks in advance for your time. Steve -------------- next part -------------- An error has occurred while executing Python code: FileNotFoundError: [Errno 2] No such file or directory: 'chosen/ShrubPoss1_green.svg' Traceback (most recent call last): File "C:\Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python/pl ugins\qgis2web\maindialog.py", line 519, in saveMap results = writer.write(self.iface, ^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python/pl ugins\qgis2web\leafletWriter.py", line 94, in write self.preview_file = self.writeLeaflet( ^^^^^^^^^^^^^^^^^^ File "C:\Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python/pl ugins\qgis2web\leafletWriter.py", line 293, in writeLeaflet useOSMB) = writeVectorLayer(layer, safeLayerName, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python/pl ugins\qgis2web\leafletLayerScripts.py", line 127, in writeVectorLayer useShapes) = getLayerStyle(layer, safeLayerName, interactive, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python/pl ugins\qgis2web\leafletStyleScripts.py", line 64, in getLayerStyle pattern) = getSymbolAsStyle(cat.symbol(), markerFolder, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python/pl ugins\qgis2web\leafletStyleScripts.py", line 244, in getSymbolAsStyle f = open(sl.path()) ^^^^^^^^^^^^^^^ FileNotFoundError: [Errno 2] No such file or directory: 'chosen/ShrubPoss1_green.svg' Python version: 3.12.11 (main, Jun 17 2025, 13:41:12) [MSC v.1943 64 bit (AMD64)] QGIS version: 3.40.10-Bratislava Bratislava, c98da2e682 Python Path: C:/PROGRA~1/QGIS 3.40.10/apps/qgis-ltr/./python C:/Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python C:/Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python/plu gins C:/PROGRA~1/QGIS 3.40.10/apps/qgis-ltr/./python/plugins C:\PROGRA~1\QGIS 3.40.10\apps\grass\grass84\etc\python C:\Users\steph\Documents C:\Program Files\QGIS 3.40.10\bin\python312.zip C:\PROGRA~1\QGIS 3.40.10\apps\Python312\DLLs C:\PROGRA~1\QGIS 3.40.10\apps\Python312\Lib C:\Program Files\QGIS 3.40.10\bin C:\Users\steph\AppData\Roaming\Python\Python312\site-packages C:\PROGRA~1\QGIS 3.40.10\apps\Python312 C:\PROGRA~1\QGIS 3.40.10\apps\Python312\Lib\site-packages C:\PROGRA~1\QGIS 3.40.10\apps\Python312\Lib\site-packages\win32 C:\PROGRA~1\QGIS 3.40.10\apps\Python312\Lib\site-packages\win32\lib C:\PROGRA~1\QGIS 3.40.10\apps\Python312\Lib\site-packages\Pythonwin C:/Users/steph/AppData/Roaming/QGIS/QGIS3\profiles\my-new-profile/python C:\Users\steph\AppData\Roaming\QGIS\QGIS3\profiles\my-new-profile\python\plu gins C:/Promenade/GIS/data/projects ------------------------------ Message: 2 Date: Mon, 29 Sep 2025 18:47:18 -0400 From: Stephen Sacks To: qgis forum Subject: [Qgis-user] crucial typo Message-ID: Content-Type: text/plain; charset=UTF-8; format=flowed I just noticed a crucial typo in the message I sent a moment ago: ?? "but that does solve my problem."? should be "but that does NOT solve my problem." Steve ------------------------------ Message: 3 Date: Tue, 30 Sep 2025 08:07:44 +0200 From: Andreas Neumann To: Stephen Sacks Cc: "forum, QGIS forum" Subject: Re: [Qgis-user] QGIS2web crash Message-ID: Content-Type: text/plain; charset="us-ascii"; Format="flowed" Hi Steve, QGIS2web is a Python plugin, not officially supported by QGIS. In such a case you should reach out to the plugin author (or team). See https://github.com/qgis2web/qgis2web for more details. They also have an issue tracker at Github for their plugin. Hopefully this helps to reach out to the ones who could probably help. Andreas On 2025-09-30 00:42, Stephen Sacks via QGIS-User wrote: > QGIS2web problem. > My map has two layers (trees and shrubs). If both layers use a single > svg marker everything looks as it should, both on my desktop and when > I export to the web (Leaflet). But if one layer (shrubs) uses > categorized svg markers then qgis2web crashes when I click Export > (see attached error message). The crash occurs even if all six > categories use the same svg file (which is the same svg which works > smoothly in the single marker, i.e., not-categorized, case). The error > message says can't find 'chosen/ShrubPoss1_green.svg' , which is a > reference to a folder and file which I had used earlier but don't use > now. I recreated both the folder and the file just so they can > satisfy some software bug that failed to clear some buffer, but that > does solve my problem. > I'm using QGIS2web(version 3.29.0) and running QGIS v3.40.10 > Bratislava on Windows 11. > Any advice would be most welcome. Thanks in advance for your time. > Steve > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 4 Date: Tue, 30 Sep 2025 16:09:55 +0200 From: celati Laurent To: qgis-user Subject: [Qgis-user] Dissolve keeping all attributes values (concatenation/aggregation)? Message-ID: Content-Type: text/plain; charset="utf-8" Dear all, I work with qgis and postgis. I would like to perform a "dissolve": https://docs.qgis.org/3.40/en/docs/user_manual/processing_algs/qgis/vectorge ometry.html#dissolve in keeping/preserving all attributes values ? For instance : a kind of aggregation/concatenation within new "output features" ? I Saw this post : https://www.aproposinfosystems.com/en/about/blog/managing-attributes-postgis -dissolve/ I have tried to reproduce the proposal with my postgis table containing several polygons *SELECT min(union_v4.max_hierar) as id, array_agg(union_v4.id ) as ids, union_v6.geomFROM union_v4, (SELECT (ST_Dump(St_multi(ST_Union(geom)))).geom as geom FROM union_v6WHERE st_intersects(union_v4.geom, union_v6.geom)GROUP BY union_v6.geom* But i obtain : *ERROR: syntax error at the end of the entryLINE 12: GROUP BY union_v6.geom ^ERROR: syntax error at the end of the entrySQL state: 42601Characters: 285* Thanks so much -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 5 Date: Tue, 30 Sep 2025 14:42:45 +0000 From: Thomas W?lk To: qgis-user Subject: [Qgis-user] Incomplete German Localization in QGIS 3.44.2/3.44.3 Message-ID: Content-Type: text/plain; charset="utf-8" Hello QGIS Community, I am using QGIS 3.44.2/3.44.3 with the language set to German and have noticed that localization is incomplete in various parts of the application. Some terms and menu items are displayed in English, even though the system language is correctly set to German. Observed Issues: - Menus and submenus display mixed languages (German/English) - Tooltips and help texts are not translated My Configuration: - QGIS Version: 3.44.2/3.44.3 - Operating System: Windows 11 - Language Setting: German (Germany) - Installation: via OSGeo4W Is there a way to (re)install the improved German localization? -- Kind regards, Thomas -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 6 Date: Tue, 30 Sep 2025 08:39:24 -0700 From: chris hermansen To: celati Laurent Cc: qgis-user Subject: Re: [Qgis-user] Dissolve keeping all attributes values (concatenation/aggregation)? Message-ID: Content-Type: text/plain; charset="utf-8" Laurent and list, On Tue, Sep 30, 2025, 07:14 celati Laurent via QGIS-User < qgis-user at lists.osgeo.org> wrote: > Dear all, > > I work with qgis and postgis. I would like to perform a "dissolve": > > https://docs.qgis.org/3.40/en/docs/user_manual/processing_algs/qgis/ve > ctorgeometry.html#dissolve > > in keeping/preserving all attributes values ? For instance : a kind > of aggregation/concatenation within new "output features" ? > > I Saw this post : > > > https://www.aproposinfosystems.com/en/about/blog/managing-attributes-p > ostgis-dissolve/ > postgis-dissolve/> > > I have tried to reproduce the proposal with my postgis table > containing several polygons > > > > > > > > > > > > > *SELECT min(union_v4.max_hierar) as id, array_agg(union_v4.id > ) as ids, union_v6.geomFROM union_v4, (SELECT > (ST_Dump(St_multi(ST_Union(geom)))).geom as geom FROM union_v6WHERE > st_intersects(union_v4.geom, union_v6.geom)GROUP BY union_v6.geom* > > But i obtain : > > > > > > > *ERROR: syntax error at the end of the entryLINE 12: GROUP BY > union_v6.geom ^ERROR: syntax error at the end of the entrySQL state: > 42601Characters: 285* > I'm on my phone and squinting a bit here but aren't you missing a right parenthesis? Ending your correlated sub query? > > -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 7 Date: Tue, 30 Sep 2025 19:02:23 +0200 From: celati Laurent To: chris hermansen Cc: qgis-user Subject: Re: [Qgis-user] Dissolve keeping all attributes values (concatenation/aggregation)? Message-ID: Content-Type: text/plain; charset="utf-8" Dear Chris, Thank you. Indeed, You right. But when i rerun the query with the edit (adding the closing parenthesis) : *SELECT min(union_v4.max_hierar) as id, array_agg(union_v4.id ) as ids, union_v6.geomFROM union_v4, (SELECT (ST_Dump(St_multi(ST_Union(geom)))).geom as geom FROM union_v6)WHERE st_intersects(union_v4.geom, union_v6.geom)GROUP BY union_v6.geom* I obtain this time the message : ERROR: la relation ? union_v4 ? n'existe pas LINE 5: FROM union_v4, ^ ERREUR: la relation ? union_v4 ? n'existe pas SQL state: 42P01 Character: 105 However, i have one table called "union_v4" within my postgis db. thanks so much. Le mar. 30 sept. 2025 ? 17:39, chris hermansen a ?crit : > Laurent and list, > > > On Tue, Sep 30, 2025, 07:14 celati Laurent via QGIS-User < > qgis-user at lists.osgeo.org> wrote: > >> Dear all, >> >> I work with qgis and postgis. I would like to perform a "dissolve": >> >> https://docs.qgis.org/3.40/en/docs/user_manual/processing_algs/qgis/v >> ectorgeometry.html#dissolve >> >> in keeping/preserving all attributes values ? For instance : a kind >> of aggregation/concatenation within new "output features" ? >> >> I Saw this post : >> >> >> https://www.aproposinfosystems.com/en/about/blog/managing-attributes- >> postgis-dissolve/ >> > -postgis-dissolve/> >> >> I have tried to reproduce the proposal with my postgis table >> containing several polygons >> >> >> >> >> >> >> >> >> >> >> >> >> *SELECT min(union_v4.max_hierar) as id, array_agg(union_v4.id >> ) as ids, union_v6.geomFROM union_v4, (SELECT >> (ST_Dump(St_multi(ST_Union(geom)))).geom as geom FROM union_v6WHERE >> st_intersects(union_v4.geom, union_v6.geom)GROUP BY union_v6.geom* >> >> But i obtain : >> >> >> >> >> >> >> *ERROR: syntax error at the end of the entryLINE 12: GROUP BY >> union_v6.geom ^ERROR: syntax error at the end of the entrySQL state: >> 42601Characters: 285* >> > > I'm on my phone and squinting a bit here but aren't you missing a > right parenthesis? Ending your correlated sub query? > >> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 8 Date: Wed, 1 Oct 2025 20:34:40 +0200 From: Andrea Giudiceandrea To: qgis-user at lists.osgeo.org Subject: Re: [Qgis-user] Incomplete German Localization in QGIS 3.44.2/3.44.3 Message-ID: <348e1200-2364-4f1b-9101-7f687fe0f04e at libero.it> Content-Type: text/plain; charset=UTF-8; format=flowed > Thomas W?lk thomas.woelk at gmail.com > Tue Sep 30 07:42:45 PDT 2025 > I am using QGIS 3.44.2/3.44.3 with the language set to German and have > noticed that localization is incomplete in various parts of the > application. Some terms and menu items are displayed in English, even > though the system language is correctly set to German. Hi Thomas, such issue is probably the same known issue already previously reported various times for various languages but unfortunately not yet fixed. Please see https://github.com/qgis/QGIS/issues/61291. Regards. Andrea ------------------------------ Message: 9 Date: Sat, 4 Oct 2025 17:38:36 +0200 From: To: Subject: [Qgis-user] py expressions don't load automatically in the Custom section Message-ID: <01f301dc3544$f32c7ea0$d9857be0$@gmail.com> Content-Type: text/plain; charset="us-ascii" Hi All, I've a few Python expressions encoded through the function editor within the field calculator. As I save and load them, they appear in the "Custom" section, but if I restart QGis the complete Custom section disappears from the panel and I've to reload the expressions. I tried to manage it with a startup.py or __init__.py, but it failed . Any idea ? THX JP -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 10 Date: Sat, 4 Oct 2025 19:31:18 +0200 From: Andrea Giudiceandrea To: qgis-user at lists.osgeo.org Subject: Re: [Qgis-user] py expressions don't load automatically in the Custom section Message-ID: <63d8d017-d965-43f8-825f-2441ccdc50a5 at libero.it> Content-Type: text/plain; charset=UTF-8; format=flowed Hi JP, the issue doesn't occur on my Windows 10 system running QGIS LTR 3.40.11. The custom functions can be either saved in the QGIS project or in the QGIS user profile (in the \python\expressions\ folder inside the current QGIS user profile folder). In the former case, the functions are automatically loaded when such QGIS project is opened, while in the latter case, the functions are automatically loaded when such QGIS user profile is used. Normally there is no need to use any startup.py or __init__.py file. Are you sure you are using the right QGIS project file or QGIS user profile in which the functions were saved? It would be useful if you indicated the exact QGIS version and Operative System name and version used and exact step-by-step procedure you follow to create and save the functions. Regards. Andrea > dejardinjp at gmail.com dejardinjp at gmail.com Sat Oct 4 08:38:36 PDT > 2025 I've a few Python expressions encoded through the function editor > within the field calculator. > As I save and load them, they appear in the "Custom" section, but if I > restart QGis the complete Custom section disappears from the panel and > I've to reload the expressions. > > I tried to manage it with a startup.py or __init__.py, but it failed . > Any idea ? THX ------------------------------ Message: 11 Date: Sun, 5 Oct 2025 20:18:22 +0200 From: celati Laurent To: qgis-user Subject: [Qgis-user] Qgis Form // Attached tool / Big performance problem for table opening Message-ID: Content-Type: text/plain; charset="utf-8" Dear all, I work with Windows with Qgis 3.34.13-Prizren. I have a Qgis project destined to be shipped on a tablet for the field (Qfield). The project contains a polygonal layer of 3427 objects (file shp). There are many columns with different types. There also relational values / joins setted for this form. So the project also includes .csv files (for relational values). The problem : the opening of this table attribute takes up to 40 seconds. I spent time to identify where the problem may come from. At one time I thought for joins/relational values. Or also CSV format. As we can see here : https://gis.stackexchange.com/questions/423054/what-is-slowing-qgis-the-most -when-opening-form After several hours of investigation, the source of the problem seems to come from 4 columns (string) for strore the pictures. After removing those 4 columns of the form, the opening time of the table become normal. I have tried to "play" with the parameter for this form attached tool, (as for example relative/absolute path size of the images, etc.). But in vain. Have people ever been confronted with this problem/limitation/problem of table opeining performance regarding the attribute form design? Linking with attached tool for image/picture ? For information, a SS of the interface : [image: image.png] [1]: https://gis.stackexchange.com/questions/423054/what-is-slowing-qgis-the-most -when-opening-form [2]: https://i.sstatic.net/28yZWYM6.jpg -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image.png Type: image/png Size: 67779 bytes Desc: not available URL: ------------------------------ Subject: Digest Footer _______________________________________________ QGIS-User mailing list QGIS-User at lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ------------------------------ End of QGIS-User Digest, Vol 236, Issue 1 ***************************************** From eleonore.wolff at ulb.be Mon Oct 6 03:53:42 2025 From: eleonore.wolff at ulb.be (=?Windows-1252?Q?WOLFF_El=E9onore?=) Date: Mon, 6 Oct 2025 10:53:42 +0000 Subject: [Qgis-user] Composer : several maps at various scale on a single layout Message-ID: Hi, I am using QGIS 3.28 Firenze because my old computer cannot support a more recent version. I would like to print one single layout composed of 19 maps at various scale. I have 2 layers in the view which are filtered to display for each map the relevant elements. When I add a new map in the composer after having blocked the first map, the content of the first map is changing according to what?s in the view :-/ which is exactly what I wanted to avoid. Could you please tell me how to proceed ? Thank you very much El?onore -------------- next part -------------- An HTML attachment was scrubbed... URL: From stefan.giese at wheregroup.com Mon Oct 6 04:01:39 2025 From: stefan.giese at wheregroup.com (Stefan Giese (WhereGroup)) Date: Mon, 6 Oct 2025 13:01:39 +0200 Subject: [Qgis-user] Composer : several maps at various scale on a single layout In-Reply-To: References: Message-ID: Hi, the key feature to achieve what you want are map themes (the eye in the layer tree widget), where you can define combinations of visible layers. So you can define for each composer map the visible layers and use them in the layout via "Follow map theme". see https://docs.qgis.org/3.40/en/docs/user_manual/introduction/general_tools.html#map-themes for more information Best regards Stefan Am 06.10.2025 um 12:53 schrieb WOLFF El?onore via QGIS-User: > > Hi, > > I am using QGIS 3.28 Firenze because my old computer cannot support a > more recent version. > > I would like to print one single layout composed of 19 maps at various > scale.? I have 2 layers in the view which are filtered to display for > each map the relevant elements. > > When I add a new map in the composer after having blocked the first > map, the content of the first map is changing according to what?s in > the view :-/ which is exactly what I wanted to avoid. > > Could you please tell me how to proceed ? > > Thank you very much > > El?onore > > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info:https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe:https://lists.osgeo.org/mailman/listinfo/qgis-user Stefan Giese GIS-Consulting WhereGroup Logo WhereGroup GmbH Schwimmbadstr. 2 79100 Freiburg Deutschland +49 761 519102 61 stefan.giese at wheregroup.com www.wheregroup.com Gesch?ftsf?hrer: Olaf Knopp, Peter Stamm Amtsgericht Bonn, HRB 9885 -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: girESJewDUHXnJnE.png Type: image/png Size: 8021 bytes Desc: not available URL: From karlo at latnet.lv Mon Oct 6 08:57:09 2025 From: karlo at latnet.lv (Karlo no Dabas maajas) Date: Mon, 6 Oct 2025 18:57:09 +0300 Subject: [Qgis-user] QGIS benchmarking Message-ID: Hi, Is there any standardized benchmarking for QGIS to create a reference table for minimum hardware requirements needed to perform specific tasks? I was surprised by the statement, ?My old computer cannot support a more recent version.? It?s likely that the computer in question struggles with the operating system (e.g., Microsoft Windows) rather than QGIS itself. For instance, macOS High Sierra supports more recent QGIS versions, so a Mac is unlikely to be the issue. To clarify, I?ve successfully performed resource-intensive tasks using QGIS 3.38 on a 13-year-old Dell Inspiron (8 GB RAM, Intel Core i3-2370M CPU) running a Linux-based system. I see no significant barriers to upgrading to the latest QGIS version, aside from my own reluctance to update. I?d appreciate any insights on standardized benchmarking or hardware recommendations for QGIS. Best regards, Karlis From gdt at lexort.com Mon Oct 6 11:26:55 2025 From: gdt at lexort.com (Greg Troxel) Date: Mon, 06 Oct 2025 14:26:55 -0400 Subject: [Qgis-user] QGIS benchmarking In-Reply-To: (Karlo no Dabas maajas via's message of "Mon, 6 Oct 2025 18:57:09 +0300") References: Message-ID: Karlo no Dabas maajas via QGIS-User writes: > I was surprised by the statement, ?My old computer cannot support a > more recent version.? It?s likely that the computer in question > struggles with the operating system (e.g., Microsoft Windows) rather > than QGIS itself. For instance, macOS High Sierra supports more recent > QGIS versions, so a Mac is unlikely to be the issue. I too found it a strange statement, and the only reasonable interpretation was that the base OS software was too old and the person was unwilling (or too organizationally constrained) to fix that. > To clarify, I?ve successfully performed resource-intensive tasks using > QGIS 3.38 on a 13-year-old Dell Inspiron (8 GB RAM, Intel Core > i3-2370M CPU) running a Linux-based system. I see no significant > barriers to upgrading to the latest QGIS version, aside from my own > reluctance to update. It makes sense to me that it runs fine. I suspect if you were dealing with 64G of point cloud, or doing imagery transforms on 64G of imagery *all the time*, you'd want a bigger computer. My main computer is only 6 years old, 32 GB RAM, i7-9700 and SSD - a Dell bought used retiring from corporate service. I wasn't worried about qgis usage when I got it and I'm still not. Startup is non-instant, taking 5s when I think it should be 1s, but not a big deal (probably a lot of serialization with netowrk delays, not bad enough to motivate anybody!), and after that things are generally very good. > I?d appreciate any insights on standardized benchmarking or hardware > recommendations for QGIS. This gets asked a lot, and I think it comes to "qgis is not a workload". qgis is a program with which one can do many things. It's like asking how big a computer do you need to compile C programs, to run emacs, or to have a postgresql database. It depends: do you want one table with 100 rows, or do you want to store the entire openstreetmap database and serve read/write requests for the entire population of editors? (My impression is that the main OSM db server is very impressive, and 512 MB of RAM and a 400 MB spinning disk will do fine for one pgsql table, the best 2002 had to offer.) A project with one or two TMS base layers and a few geopackages with a hundred features is going to run ok on computers that are considered just barely able to run a modern (bloated) web browser. (Your computer is arguably 4x as big as what I mean here.) Someone wanting to load 32 GB of imagery or point cloud and do operations on them is going to have a hard time on a computer with 2 GB of RAM. Someone wanting to process 1 TB is going to have an even harder time. I think it comes down to; if you're going to be doing heavy raster processing, for professional use, then get a lot of memory. Regardless, get a fairly large amount of memory, and use good-quality SSDs. Separately from QGIS, I'd say "do not buy a computer now unless it has at least 32 GB of RAM". And if you are building a professional-use qgis workstation for raster processing (not just basemap display or looking at imagery), then I'd get 128 GB. But really think about your data qsizes and try it on a 32 GB RAM machine first. There's probably more to it, but to me this shows the gulf between those who think like I do and those who think this is more complicated and more well defined. I could very well be off; corrections and actual experience welcome. Greg From senhor.neto at gmail.com Tue Oct 7 00:40:55 2025 From: senhor.neto at gmail.com (Alexandre Neto) Date: Tue, 7 Oct 2025 08:40:55 +0100 Subject: [Qgis-user] Composer : several maps at various scale on a single layout In-Reply-To: References: Message-ID: This is the trick. Don't lock maps and styles on the composer itself, create different themes and ask each map to follow a different theme. Moreover, if the same layer is supposed to have more than on style, notice that you can add several styles to the layer. Right-click > Style > add style. A theme stores what layers are visible and which style are they using. Best regards, Alex A segunda, 6/10/2025, 12:10, Stefan Giese (WhereGroup) via QGIS-User < qgis-user at lists.osgeo.org> escreveu: > Hi, > > the key feature to achieve what you want are map themes (the eye in the > layer tree widget), where you can define combinations of visible layers. So > you can define for each composer map the visible layers and use them in the > layout via "Follow map theme". > > see > https://docs.qgis.org/3.40/en/docs/user_manual/introduction/general_tools.html#map-themes > for more information > > Best regards > > Stefan > Am 06.10.2025 um 12:53 schrieb WOLFF El?onore via QGIS-User: > > Hi, > > I am using QGIS 3.28 Firenze because my old computer cannot support a more > recent version. > > I would like to print one single layout composed of 19 maps at various > scale. I have 2 layers in the view which are filtered to display for each > map the relevant elements. > > When I add a new map in the composer after having blocked the first map, > the content of the first map is changing according to what?s in the view > :-/ which is exactly what I wanted to avoid. > > Could you please tell me how to proceed ? > > Thank you very much > > El?onore > > > > _______________________________________________ > QGIS-User mailing listQGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Stefan Giese > > GIS-Consulting > > [image: WhereGroup Logo] > > > WhereGroup GmbH > Schwimmbadstr. 2 > > 79100 Freiburg > > Deutschland > > > +49 761 519102 61 > > stefan.giese at wheregroup.com > www.wheregroup.com > > Gesch?ftsf?hrer: > Olaf Knopp, Peter Stamm > Amtsgericht Bonn, HRB 9885 > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: girESJewDUHXnJnE.png Type: image/png Size: 8021 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: girESJewDUHXnJnE.png Type: image/png Size: 8021 bytes Desc: not available URL: From eleonore.wolff at ulb.be Tue Oct 7 01:06:59 2025 From: eleonore.wolff at ulb.be (=?Windows-1252?Q?WOLFF_El=E9onore?=) Date: Tue, 7 Oct 2025 08:06:59 +0000 Subject: [Qgis-user] Composer : several maps at various scale on a single layout In-Reply-To: References: Message-ID: Thank you very much for the second advise. Without using the styles, yesterday adding themes allowed me to compose a single layout with several maps. Here is a snapshot [Image] All the best, El?onore De : QGIS-User de la part de Alexandre Neto via QGIS-User Date : mardi, 7 octobre 2025 ? 09:41 ? : Stefan Giese (WhereGroup) Cc : QGIS User Objet : Re: [Qgis-user] Composer : several maps at various scale on a single layout This is the trick. Don't lock maps and styles on the composer itself, create different themes and ask each map to follow a different theme. Moreover, if the same layer is supposed to have more than on style, notice that you can add several styles to the layer. Right-click > Style > add style. A theme stores what layers are visible and which style are they using. Best regards, Alex A segunda, 6/10/2025, 12:10, Stefan Giese (WhereGroup) via QGIS-User > escreveu: Hi, the key feature to achieve what you want are map themes (the eye in the layer tree widget), where you can define combinations of visible layers. So you can define for each composer map the visible layers and use them in the layout via "Follow map theme". see https://docs.qgis.org/3.40/en/docs/user_manual/introduction/general_tools.html#map-themes for more information Best regards Stefan Am 06.10.2025 um 12:53 schrieb WOLFF El?onore via QGIS-User: Hi, I am using QGIS 3.28 Firenze because my old computer cannot support a more recent version. I would like to print one single layout composed of 19 maps at various scale. I have 2 layers in the view which are filtered to display for each map the relevant elements. When I add a new map in the composer after having blocked the first map, the content of the first map is changing according to what?s in the view :-/ which is exactly what I wanted to avoid. Could you please tell me how to proceed ? Thank you very much El?onore _______________________________________________ QGIS-User mailing list QGIS-User at lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user Stefan Giese GIS-Consulting [WhereGroup Logo] WhereGroup GmbH Schwimmbadstr. 2 79100 Freiburg Deutschland +49 761 519102 61 stefan.giese at wheregroup.com www.wheregroup.com Gesch?ftsf?hrer: Olaf Knopp, Peter Stamm Amtsgericht Bonn, HRB 9885 _______________________________________________ QGIS-User mailing list QGIS-User at lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.png Type: image/png Size: 62999 bytes Desc: image001.png URL: From bnapier at greenvalleyconsulting.com.au Tue Oct 7 21:09:56 2025 From: bnapier at greenvalleyconsulting.com.au (Bruce Napier) Date: Wed, 8 Oct 2025 04:09:56 +0000 Subject: [Qgis-user] QGIS Training and Specialist Materials Message-ID: Hi all, I'm considering applying for a grant from an industry body to develop QGIS training materials specifically for farmers - actually to assist beef producers (ranchers) manage soils and pastures. It is intended that, following provision of training workshops, the materials will be released publicly for general use. Also hoping to develop a local community of practice around this Can someone please advise what obligations (legal and moral) I would have to the QGIS organization, or where I should look to find this out? Many thanks Bruce Napier -------------- next part -------------- An HTML attachment was scrubbed... URL: From gdt at lexort.com Wed Oct 8 04:49:01 2025 From: gdt at lexort.com (Greg Troxel) Date: Wed, 08 Oct 2025 07:49:01 -0400 Subject: [Qgis-user] QGIS Training and Specialist Materials In-Reply-To: (Bruce Napier via's message of "Wed, 8 Oct 2025 04:09:56 +0000") References: Message-ID: Bruce Napier via QGIS-User writes: > I'm considering applying for a grant from an industry body to develop > QGIS training materials specifically for farmers - actually to assist > beef producers (ranchers) manage soils and pastures. It is intended > that, following provision of training workshops, the materials will be > released publicly for general use. Also hoping to develop a local > community of practice around this > > Can someone please advise what obligations (legal and moral) I would > have to the QGIS organization, or where I should look to find this > out? I can't speak for 'the QGIS organization' and I'm not even sure what that is exactly*, but speaking as a (non-attorney) member of the Free Software community, the big thing is to follow licenses. You are going to create training materials, and if you write it all from scratch, I don't see a copyright issue. If you adapt materials that exist, then you'll have to read, understand, and follow the license. * I'm not sure because as an individual non-commercial user who helps with packaging (and advice about WGS84 :-) I've never paid attention, but it's on the website: https://qgis.org/community/foundation/charter/ As far as "good Free Software citizen", I'd say you should: - make sure everyone (including those that receive training) understands software licensing at a high level (as in 1 slide :) - make sure people understand that Free Software has volunteer community support and that if they have problems, they should not expect helpdesk/support that comes with paying for a license for vastly expensive proprietary software, and that if they interact with lists/forums/issue-trackers, they should not project that expectation And as "beter Free Software citizen", I'd suggest either: - release your training materials, in source form, under an open license (at least when you are done your grant, as you suggest), or - make a donation to some charitable org that supports qgis-related Free Software (if you are earning money from qgis without contributing developed code/docs to the commons) From geospatial at schula.org Wed Oct 8 05:09:48 2025 From: geospatial at schula.org (Tobias Schula) Date: Wed, 8 Oct 2025 14:09:48 +0200 Subject: [Qgis-user] Qgis Form // Attached tool / Big performance problem for table opening In-Reply-To: References: Message-ID: <1ee0cfbe-7d7b-4258-bc3f-1dbc2eb594b6@schula.org> Am 05.10.25 um 20:18 schrieb celati Laurent via QGIS-User: > I work with Windows with Qgis 3.34.13-Prizren. > I have a Qgis project destined to be shipped on a tablet for the field > (Qfield). > The project contains a polygonal layer of 3427 objects (file shp). There > are many columns with different types. There also relational values / joins > setted for this form. So the project also includes .csv files (for > relational values). Have you tried putting all the data into a database? For example a single geopackage file? Reading CSV is slower than from SQLite. Geopackage is an SQLite database. > The problem : the opening of this table attribute takes up to 40 seconds. I > spent time to identify where the problem may come from. At one time I > thought for joins/relational values. Or also CSV format. As we can see here > : > https://gis.stackexchange.com/questions/423054/what-is-slowing-qgis-the-most-when-opening-form > > After several hours of investigation, the source of the problem seems to > come from 4 columns (string) for strore the pictures. After removing those > 4 columns of the form, the opening time of the table become normal. > I have tried to "play" with the parameter for this form attached tool, (as > for example relative/absolute path size of the images, etc.). But in vain. Are you storing the picture in a separate table? For pictures, this is the approach QField recommends: https://docs.qfield.org/how-to/pictures/ -- Tobias A Schula Forestry Expert geospatial at schula.org -------------- next part -------------- A non-text attachment was scrubbed... Name: OpenPGP_0x3B6BA2B3E91776FA.asc Type: application/pgp-keys Size: 3126 bytes Desc: OpenPGP public key URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: OpenPGP_signature.asc Type: application/pgp-signature Size: 840 bytes Desc: OpenPGP digital signature URL: From rjhale at northrivergeographic.com Wed Oct 8 06:06:51 2025 From: rjhale at northrivergeographic.com (Randal Hale) Date: Wed, 8 Oct 2025 09:06:51 -0400 Subject: [Qgis-user] QGIS Training and Specialist Materials In-Reply-To: References: Message-ID: <971c7016-06d0-4481-b894-6e5c8e05357b@northrivergeographic.com> So I taught QGIS classes way before I was able to give back. It's sort of up to you - there's no legal or moral obligation. Give back what you can however you can if you wish. Help people, Donate money, or do what you can. Having a group of farming folk within the larger QGIS Community would be pretty cool (at least to me). Good Luck! Randy On 10/8/25 00:09, Bruce Napier via QGIS-User wrote: > > Hi all, > > I?m considering applying for a grant from an industry body to develop > QGIS training materials specifically for farmers ? actually to assist > beef producers (ranchers) manage soils and pastures. It is intended > that, following provision of training workshops, the materials will be > released publicly for general use. Also hoping to develop a local > community of practice around this > > Can someone please advise what obligations (legal and moral) I would > have to the QGIS organization, or where I should look to find this out? > > Many thanks > > Bruce Napier > > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info:https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe:https://lists.osgeo.org/mailman/listinfo/qgis-user -- ------------------ Randal Hale North Rivergeographic Systems, Inc https://www.northrivergeographic.com https://www.qgis-us.org https://www.geohipster.com I hope this email finds you in the mountains, and as sun peeps through the trees the squirrels begin foraging. -------------- next part -------------- An HTML attachment was scrubbed... URL: From manarajahmundry2015 at gmail.com Thu Oct 9 00:27:17 2025 From: manarajahmundry2015 at gmail.com (Ravi Kumar) Date: Thu, 9 Oct 2025 12:57:17 +0530 Subject: [Qgis-user] Bug: Raster Mbtiles Message-ID: Qgis3.4. TOOL BOX :Raster Mbtiles creation. Existing file name for over-right gives error. -------------- next part -------------- An HTML attachment was scrubbed... URL: From mettimat116 at gmail.com Thu Oct 9 01:09:18 2025 From: mettimat116 at gmail.com (metti play) Date: Thu, 9 Oct 2025 10:09:18 +0200 Subject: [Qgis-user] Export problem with layout In-Reply-To: References: Message-ID: Good morning everyone, I am experiencing a problem with QGIS on several laptops with different processors and video cards. When exporting with Layout, it loads indefinitely and crashes. I don't understand what the problem is, unfortunately QGIS does not leave me any logs to better understand the problem. Has this ever happened to you? The laptops had the following configurations: - Laptop 1: i9-14th, 32 GB RAM, RTX 3500 - Laptop 2: Ultra 7, 32 GB RAM, RTX A500 - Laptop 3: AMD Ryzen 5 220 w/ Radeon 740M Graphics, 16GB RAM - Laptop 4: i7-11th, 16 GB RAM While it works on my PC, which has an i5-11th and 16 GB RAM, all tests were performed with QGIS 3.40.11 LTR using the same project. Can you give us some tips to solve the problem? Best regards, Mattia -------------- next part -------------- An HTML attachment was scrubbed... URL: From phil at wyatt-family.com Thu Oct 9 14:50:03 2025 From: phil at wyatt-family.com (Phil Wyatt) Date: Fri, 10 Oct 2025 08:50:03 +1100 Subject: [Qgis-user] Export problem with layout In-Reply-To: References: Message-ID: Hi Mattie, Give us some clues as to what layers are in the layout? Network layers, raster, vectors, same user logins, same network? Cheers - Phil, > On 9 Oct 2025, at 7:09?pm, metti play via QGIS-User wrote: > > ? > Good morning everyone, > > I am experiencing a problem with QGIS on several laptops with different processors and video cards. > > When exporting with Layout, it loads indefinitely and crashes. > > I don't understand what the problem is, unfortunately QGIS does not leave me any logs to better understand the problem. > > Has this ever happened to you? The laptops had the following configurations: > > - Laptop 1: i9-14th, 32 GB RAM, RTX 3500 > > - Laptop 2: Ultra 7, 32 GB RAM, RTX A500 > > - Laptop 3: AMD Ryzen 5 220 w/ Radeon 740M Graphics, 16GB RAM > > - Laptop 4: i7-11th, 16 GB RAM > > While it works on my PC, which has an i5-11th and 16 GB RAM, all tests were performed with QGIS 3.40.11 LTR using the same project. > > Can you give us some tips to solve the problem? > > Best regards, > > Mattia > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -------------- next part -------------- An HTML attachment was scrubbed... URL: From joe at joelertola.com Thu Oct 9 19:07:08 2025 From: joe at joelertola.com (Joe Lertola) Date: Thu, 9 Oct 2025 22:07:08 -0400 Subject: [Qgis-user] [ANN] TopoToImage - Terrain Visualization Tool with GeoTIFF Export Message-ID: <38C57227-2750-4749-9E94-55AA719795BA@joelertola.com> Hi everyone, I'd like to share an open-source tool that complements QGIS workflows for terrain visualization. TopoToImage 4.0 is a specialized application for converting digital elevation models into colored shaded relief images with GeoTIFF export. It?s designed for users who want a dedicated gradient-based workflow for terrain coloring. Key Features: ? Interactive gradient editor with drag-and-drop color stops ? Professional hillshading with configurable lighting and cast shadows ? Exports georeferenced GeoTIFF files ready for QGIS ? Works with common elevation formats (SRTM, GTOPO30, GMTED2010, etc.) ? Save and share custom gradient libraries ? Free and open-source (MIT license) Typical Workflow: 1. Load elevation data (GeoTIFF, BIL, etc.) 2. Apply or design custom color gradients 3. Configure hillshading and shadows 4. Export as GeoTIFF 5. Import into QGIS as a terrain base layer I know QGIS has excellent built-in terrain visualization tools. TopoToImage offers a different approach focused on rapid gradient experimentation and reusable color schemes - useful when you need to create multiple terrain visualizations with consistent styling. Download & Info: ? GitHub: https://github.com/jlert/TopoToImage/releases/latest ? Documentation: Includes User Guide PDF and Elevation Data Sources guide Platform: ? macOS (Apple Silicon): Download app bundle ? macOS (Intel), Windows, Linux: Download the source code. Run from source (Python 3.8+ required) ? Installation details in README Note for macOS users: The app shows a Gatekeeper warning on first launch (unsigned developer). Right-click ? Open to bypass. Beta Status: This is an early release and I'm actively looking for feedback from the GIS community. If you try it, I'd appreciate hearing what works well and what could be improved. Questions welcome! Best regards, Joe Lertola From John.Janmaat at ubc.ca Thu Oct 9 21:50:11 2025 From: John.Janmaat at ubc.ca (Janmaat, Johannus) Date: Fri, 10 Oct 2025 04:50:11 +0000 Subject: [Qgis-user] Font issue Message-ID: Hello, I installed QGIS 3.40.11. The screen fonts for dialogs were too tiny to read. A web search led me to the settings page, where I changed the font sizes. For most dialogs, this seemed to work. However, for the Settings->Options dialog, the larger fonts have made it unusable. See the included screen shot. Any suggestions? I did remove the QGIS folders, but nothing changed. Thanks. [cid:5d1ec03b-5c43-4968-a8a5-aa7e79c3f4aa] Prof. Johannus (John) A. Janmaat Ph.D., MBA, M.Sc., B.Sc. (He, Him, His) Professor of Economics, RIC Chair in Water Resources and Environmental Sustainability, IGS Sustainability Theme Coordinator Faculty of Arts and Social Sciences | Department of Economics, Philosophy and Political Science The University of British Columbia | Okanagan Campus | Syilx Okanagan Nation Territory 1147 Research Road | Kelowna BC | V1V 1V7 Canada Phone 250 807 8021 john.janmaat at ubc.ca | https://www.linkedin.com/in/john-janmaat-76a0731a/ https://blogs.ubc.ca/jajanmaat/ The UBC Okanagan campus is situated on the traditional, ancestral, unceded territory of the Syilx Okanagan Nation. [UBC E-mail Signature] -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image.png Type: image/png Size: 452145 bytes Desc: image.png URL: From rdmailings at duif.net Thu Oct 9 23:21:05 2025 From: rdmailings at duif.net (Richard Duivenvoorde) Date: Fri, 10 Oct 2025 08:21:05 +0200 Subject: [Qgis-user] Font issue In-Reply-To: References: Message-ID: <4020c098-9846-4386-b740-59830e281b43@duif.net> Hi, I cannot reproduce this on my systems. I reckon that you have a HDPI screen on windows, and searching at the issuetracker on "font size" several issues pop up, eg https://github.com/qgis/QGIS/issues/63065 Are you able to create an issue on https://github.com/qgis/QGIS/issues to provide more information about your exact setup, and ways to reproduce this? Note that QGIS 3.x is based on Qt5 and this kind (hi res) setups wasn't around at that time. I know that there has been a lot of work on font-scaling and handling hdpi by Nyall. Would it be possible for you to install the experimental latest version of QGIS, which is build on Qt6: https://qgis.org/downloads/QGISQT6-OSGeo4W-3.40.11-1.msi (thinking you want LTR) or maybe even latest: https://qgis.org/downloads/QGISQT6-OSGeo4W-3.44.3-1.msi and do some testing with those? If these still have issues then please(!) create issues because then even the latest and greatest version needs love and work... Regards, Richard Duivenvoorde On 10-10-2025 06:50, Janmaat, Johannus via QGIS-User wrote: > Hello, > > I installed QGIS 3.40.11.? The screen fonts for dialogs were too tiny to read.? A web search led me to the settings page, where I changed the font sizes.? For most dialogs, this seemed to work.? However, for the Settings->Options dialog, the larger fonts have made it unusable.? See the included screen shot. > > Any suggestions?? I did remove the QGIS folders, but nothing changed. > > Thanks. > > > *Prof.?Johannus (John)?A.?Janmaat*Ph.D., MBA, M.Sc., B.Sc. (_He, Him, His _) > Professor of Economics,?RIC Chair in Water Resources and Environmental Sustainability,?IGS Sustainability Theme Coordinator > Faculty of Arts and Social Sciences?|?Department of Economics, Philosophy and Political Science > The University of British Columbia | Okanagan Campus | Syilx Okanagan Nation Territory > 1147 Research Road?|?Kelowna BC?|?V1V 1V7 Canada > Phone 250 807 8021 > _john.janmaat at ubc.ca _?| _https://www.linkedin.com/in/john-janmaat-76a0731a/ _ > _https://blogs.ubc.ca/jajanmaat/ _ > > /The UBC Okanagan campus is situated on the traditional, ancestral, unceded territory of the Syilx Okanagan Nation./ > > UBC E-mail Signature > > > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user From riaanb at iafrica.com Fri Oct 10 01:36:58 2025 From: riaanb at iafrica.com (riaanb at iafrica.com) Date: Fri, 10 Oct 2025 10:36:58 +0200 Subject: [Qgis-user] FGDC symbology Message-ID: <016601dc39c1$0d5fb640$281f22c0$@iafrica.com> Good day, I am looking for the FGDC (Digital Cartographic Standards for Geologic Symbolization) symbology that is compatible with QGIS. There are some available in various websites (bits & pieces) but I require the full set. The email on their website just bounces back. Help? Ideas? Suggestions? Riaan -------------- next part -------------- An HTML attachment was scrubbed... URL: From phidrho at gmail.com Sat Oct 11 04:14:49 2025 From: phidrho at gmail.com (=?UTF-8?Q?Vedran_Stojnovi=C4=87?=) Date: Sat, 11 Oct 2025 13:14:49 +0200 Subject: [Qgis-user] Export problem with layout In-Reply-To: References: Message-ID: Hi, I had similar problem few months ago, and I believe it was related to creating project in newer version of QGIS (3.42) and then continuing working in older version (3.40). My solution was to create entire project from scratch in lower version and then it was everything OK. I think that even if you open project once in newer version and save it without making any chages it could mess things up with printing/exporting from layout. ?et, 9. lis 2025. u 23:57 Phil Wyatt via QGIS-User < qgis-user at lists.osgeo.org> napisao je: > Hi Mattie, > > Give us some clues as to what layers are in the layout? Network layers, > raster, vectors, same user logins, same network? > > Cheers - Phil, > > > On 9 Oct 2025, at 7:09?pm, metti play via QGIS-User < > qgis-user at lists.osgeo.org> wrote: > > ? > > Good morning everyone, > > I am experiencing a problem with QGIS on several laptops with different > processors and video cards. > > When exporting with Layout, it loads indefinitely and crashes. > > I don't understand what the problem is, unfortunately QGIS does not leave > me any logs to better understand the problem. > > Has this ever happened to you? The laptops had the following > configurations: > > - Laptop 1: i9-14th, 32 GB RAM, RTX 3500 > > - Laptop 2: Ultra 7, 32 GB RAM, RTX A500 > > - Laptop 3: AMD Ryzen 5 220 w/ Radeon 740M Graphics, 16GB RAM > > - Laptop 4: i7-11th, 16 GB RAM > > While it works on my PC, which has an i5-11th and 16 GB RAM, all tests > were performed with QGIS 3.40.11 LTR using the same project. > > Can you give us some tips to solve the problem? > > Best regards, > > Mattia > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > -- Srda?an pozdrav / Kind regards, Vedran Stojnovi?. -------------- next part -------------- An HTML attachment was scrubbed... URL: From mettimat116 at gmail.com Sat Oct 11 06:35:58 2025 From: mettimat116 at gmail.com (metti play) Date: Sat, 11 Oct 2025 15:35:58 +0200 Subject: [Qgis-user] Export problem with layout In-Reply-To: References: Message-ID: Hi, thank you very much for your reply. One thing I have noticed is that in the project there are layers taken from the Internet by the Swiss Federation. if I export with the pc disconnected from the internet, it works. But obviously the layers that it should recover from the internet are missing. Has it ever happened to you? among other things, I am doing the tests connected to a network cable with a very fast business connection if I am not mistaken it goes to 10 Gb/s. Thanks a lot and have a good continuation Matthew Il Sab 11 Ott 2025, 13:15 Vedran Stojnovi? ha scritto: > Hi, > > I had similar problem few months ago, and I believe it was related to > creating project in newer version of QGIS (3.42) and then continuing working > in older version (3.40). > My solution was to create entire project from scratch in lower version and > then it was everything OK. I think that even if you open project once in > newer version and save it without making any chages it could mess things up > with printing/exporting from layout. > > ?et, 9. lis 2025. u 23:57 Phil Wyatt via QGIS-User < > qgis-user at lists.osgeo.org> napisao je: > >> Hi Mattie, >> >> Give us some clues as to what layers are in the layout? Network layers, >> raster, vectors, same user logins, same network? >> >> Cheers - Phil, >> >> >> On 9 Oct 2025, at 7:09?pm, metti play via QGIS-User < >> qgis-user at lists.osgeo.org> wrote: >> >> ? >> >> Good morning everyone, >> >> I am experiencing a problem with QGIS on several laptops with different >> processors and video cards. >> >> When exporting with Layout, it loads indefinitely and crashes. >> >> I don't understand what the problem is, unfortunately QGIS does not leave >> me any logs to better understand the problem. >> >> Has this ever happened to you? The laptops had the following >> configurations: >> >> - Laptop 1: i9-14th, 32 GB RAM, RTX 3500 >> >> - Laptop 2: Ultra 7, 32 GB RAM, RTX A500 >> >> - Laptop 3: AMD Ryzen 5 220 w/ Radeon 740M Graphics, 16GB RAM >> >> - Laptop 4: i7-11th, 16 GB RAM >> >> While it works on my PC, which has an i5-11th and 16 GB RAM, all tests >> were performed with QGIS 3.40.11 LTR using the same project. >> >> Can you give us some tips to solve the problem? >> >> Best regards, >> >> Mattia >> _______________________________________________ >> QGIS-User mailing list >> QGIS-User at lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >> >> _______________________________________________ >> QGIS-User mailing list >> QGIS-User at lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >> > > > -- > Srda?an pozdrav / Kind regards, > Vedran Stojnovi?. > -------------- next part -------------- An HTML attachment was scrubbed... URL: From laurent.celati at gmail.com Sun Oct 12 10:27:18 2025 From: laurent.celati at gmail.com (celati Laurent) Date: Sun, 12 Oct 2025 19:27:18 +0200 Subject: [Qgis-user] Percentage of area overlaped / covered by feature of another layer Message-ID: Dear all, I'm working with QGIS and, if necessary, PostGIS. I have two vector layers : - A first polygonal layer resulting from vectorization work using photointerpretation of the aerial imagery (in blue in the attached screenshot below). - A second polygonal layer in the same area resulting from segmentation of the same aerial imagery (in yellow in the attached screenshot below). [image: unnamed.png] Each feature in the two layers has a unique identifier (representing thanks to labels in the screenshot). I'd like to be able to produce a small performance indicator of the segmentation performs in faithfully matching the photointerpretation. I was thinking there's probably something that could be done with geoprocessing (union, intersection?) and a area calculation ? An indicator of segmentation performance could be: for each photo-interpreted feature/polygon, calculate the percentage of the surface area covered by the feature in the segmentation layer with the biggest overlap ? To be more specific, in the example screenshot, this could be: "For feature 11 in photo-interpretation layer (blue), I would like to know the percentage of the surface area covered by the feature in the segmentation layer that has the highest overlap with this feature 11 (in this specific case, it's probably feature 42 in yellow)." This could be: area of feature 42 overlapping feature 11 / total area of feature 11? I don't know if I'm on the right path. How could we translate/reach this needs toward a QGIS and/or PostGIS tool? Thanks so much -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: unnamed.png Type: image/png Size: 141640 bytes Desc: not available URL: From boxerg at iinet.net.au Sun Oct 12 15:26:45 2025 From: boxerg at iinet.net.au (boxerg at iinet.net.au) Date: Mon, 13 Oct 2025 06:26:45 +0800 Subject: [Qgis-user] FGDC Geology Symbols In-Reply-To: References: Message-ID: <002301dc3bc7$4bcfc2f0$e36f48d0$@iinet.net.au> Hi Riaan, The USGS symbol set can be downloaded from the QGIS resource sharing plug-in. The USGS geological patterns can be downloaded the same way, just need to add an additional repository - https://github.com/BC-Consulting/FGDC-4-QGIS,git. Regards Grant -----Original Message----- From: QGIS-User On Behalf Of qgis-user-request at lists.osgeo.org Sent: Monday, 13 October 2025 1:28 AM To: qgis-user at lists.osgeo.org Subject: QGIS-User Digest, Vol 236, Issue 5 Send QGIS-User mailing list submissions to qgis-user at lists.osgeo.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.osgeo.org/mailman/listinfo/qgis-user or, via email, send a message with subject or body 'help' to qgis-user-request at lists.osgeo.org You can reach the person managing the list at qgis-user-owner at lists.osgeo.org When replying, please edit your Subject line so it is more specific than "Re: Contents of QGIS-User digest..." Today's Topics: 1. Re: Font issue (Richard Duivenvoorde) 2. FGDC symbology (riaanb at iafrica.com) 3. Re: Export problem with layout (Vedran Stojnovi?) 4. Re: Export problem with layout (metti play) 5. Percentage of area overlaped / covered by feature of another layer (celati Laurent) ---------------------------------------------------------------------- Message: 1 Date: Fri, 10 Oct 2025 08:21:05 +0200 From: Richard Duivenvoorde To: "Janmaat, Johannus" , "qgis-user at lists.osgeo.org" Subject: Re: [Qgis-user] Font issue Message-ID: <4020c098-9846-4386-b740-59830e281b43 at duif.net> Content-Type: text/plain; charset=UTF-8; format=flowed Hi, I cannot reproduce this on my systems. I reckon that you have a HDPI screen on windows, and searching at the issuetracker on "font size" several issues pop up, eg https://github.com/qgis/QGIS/issues/63065 Are you able to create an issue on https://github.com/qgis/QGIS/issues to provide more information about your exact setup, and ways to reproduce this? Note that QGIS 3.x is based on Qt5 and this kind (hi res) setups wasn't around at that time. I know that there has been a lot of work on font-scaling and handling hdpi by Nyall. Would it be possible for you to install the experimental latest version of QGIS, which is build on Qt6: https://qgis.org/downloads/QGISQT6-OSGeo4W-3.40.11-1.msi (thinking you want LTR) or maybe even latest: https://qgis.org/downloads/QGISQT6-OSGeo4W-3.44.3-1.msi and do some testing with those? If these still have issues then please(!) create issues because then even the latest and greatest version needs love and work... Regards, Richard Duivenvoorde On 10-10-2025 06:50, Janmaat, Johannus via QGIS-User wrote: > Hello, > > I installed QGIS 3.40.11.? The screen fonts for dialogs were too tiny to read.? A web search led me to the settings page, where I changed the font sizes.? For most dialogs, this seemed to work.? However, for the Settings->Options dialog, the larger fonts have made it unusable.? See the included screen shot. > > Any suggestions?? I did remove the QGIS folders, but nothing changed. > > Thanks. > > > *Prof.?Johannus (John)?A.?Janmaat*Ph.D., MBA, M.Sc., B.Sc. (_He, Him, > His _) > Professor of Economics,?RIC Chair in Water Resources and Environmental > Sustainability,?IGS Sustainability Theme Coordinator Faculty of Arts > and Social Sciences?|?Department of Economics, Philosophy and > Political Science The University of British Columbia | Okanagan Campus > | Syilx Okanagan Nation Territory > 1147 Research Road?|?Kelowna BC?|?V1V 1V7 Canada Phone 250 807 8021 > _john.janmaat at ubc.ca _?| > _https://www.linkedin.com/in/john-janmaat-76a0731a/ > >_ _https://blogs.ubc.ca/jajanmaat/ _ > > /The UBC Okanagan campus is situated on the traditional, ancestral, > unceded territory of the Syilx Okanagan Nation./ > > UBC E-mail Signature > > > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ------------------------------ Message: 2 Date: Fri, 10 Oct 2025 10:36:58 +0200 From: To: Subject: [Qgis-user] FGDC symbology Message-ID: <016601dc39c1$0d5fb640$281f22c0$@iafrica.com> Content-Type: text/plain; charset="us-ascii" Good day, I am looking for the FGDC (Digital Cartographic Standards for Geologic Symbolization) symbology that is compatible with QGIS. There are some available in various websites (bits & pieces) but I require the full set. The email on their website just bounces back. Help? Ideas? Suggestions? Riaan -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 3 Date: Sat, 11 Oct 2025 13:14:49 +0200 From: Vedran Stojnovi? To: Phil Wyatt Cc: metti play , qgis-user at lists.osgeo.org Subject: Re: [Qgis-user] Export problem with layout Message-ID: Content-Type: text/plain; charset="utf-8" Hi, I had similar problem few months ago, and I believe it was related to creating project in newer version of QGIS (3.42) and then continuing working in older version (3.40). My solution was to create entire project from scratch in lower version and then it was everything OK. I think that even if you open project once in newer version and save it without making any chages it could mess things up with printing/exporting from layout. ?et, 9. lis 2025. u 23:57 Phil Wyatt via QGIS-User < qgis-user at lists.osgeo.org> napisao je: > Hi Mattie, > > Give us some clues as to what layers are in the layout? Network > layers, raster, vectors, same user logins, same network? > > Cheers - Phil, > > > On 9 Oct 2025, at 7:09?pm, metti play via QGIS-User < > qgis-user at lists.osgeo.org> wrote: > > ? > > Good morning everyone, > > I am experiencing a problem with QGIS on several laptops with > different processors and video cards. > > When exporting with Layout, it loads indefinitely and crashes. > > I don't understand what the problem is, unfortunately QGIS does not > leave me any logs to better understand the problem. > > Has this ever happened to you? The laptops had the following > configurations: > > - Laptop 1: i9-14th, 32 GB RAM, RTX 3500 > > - Laptop 2: Ultra 7, 32 GB RAM, RTX A500 > > - Laptop 3: AMD Ryzen 5 220 w/ Radeon 740M Graphics, 16GB RAM > > - Laptop 4: i7-11th, 16 GB RAM > > While it works on my PC, which has an i5-11th and 16 GB RAM, all tests > were performed with QGIS 3.40.11 LTR using the same project. > > Can you give us some tips to solve the problem? > > Best regards, > > Mattia > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > -- Srda?an pozdrav / Kind regards, Vedran Stojnovi?. -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 4 Date: Sat, 11 Oct 2025 15:35:58 +0200 From: metti play To: Vedran Stojnovi? Cc: Phil Wyatt , qgis-user at lists.osgeo.org Subject: Re: [Qgis-user] Export problem with layout Message-ID: Content-Type: text/plain; charset="utf-8" Hi, thank you very much for your reply. One thing I have noticed is that in the project there are layers taken from the Internet by the Swiss Federation. if I export with the pc disconnected from the internet, it works. But obviously the layers that it should recover from the internet are missing. Has it ever happened to you? among other things, I am doing the tests connected to a network cable with a very fast business connection if I am not mistaken it goes to 10 Gb/s. Thanks a lot and have a good continuation Matthew Il Sab 11 Ott 2025, 13:15 Vedran Stojnovi? ha scritto: > Hi, > > I had similar problem few months ago, and I believe it was related to > creating project in newer version of QGIS (3.42) and then continuing > working in older version (3.40). > My solution was to create entire project from scratch in lower version > and then it was everything OK. I think that even if you open project > once in newer version and save it without making any chages it could > mess things up with printing/exporting from layout. > > ?et, 9. lis 2025. u 23:57 Phil Wyatt via QGIS-User < > qgis-user at lists.osgeo.org> napisao je: > >> Hi Mattie, >> >> Give us some clues as to what layers are in the layout? Network >> layers, raster, vectors, same user logins, same network? >> >> Cheers - Phil, >> >> >> On 9 Oct 2025, at 7:09?pm, metti play via QGIS-User < >> qgis-user at lists.osgeo.org> wrote: >> >> ? >> >> Good morning everyone, >> >> I am experiencing a problem with QGIS on several laptops with >> different processors and video cards. >> >> When exporting with Layout, it loads indefinitely and crashes. >> >> I don't understand what the problem is, unfortunately QGIS does not >> leave me any logs to better understand the problem. >> >> Has this ever happened to you? The laptops had the following >> configurations: >> >> - Laptop 1: i9-14th, 32 GB RAM, RTX 3500 >> >> - Laptop 2: Ultra 7, 32 GB RAM, RTX A500 >> >> - Laptop 3: AMD Ryzen 5 220 w/ Radeon 740M Graphics, 16GB RAM >> >> - Laptop 4: i7-11th, 16 GB RAM >> >> While it works on my PC, which has an i5-11th and 16 GB RAM, all >> tests were performed with QGIS 3.40.11 LTR using the same project. >> >> Can you give us some tips to solve the problem? >> >> Best regards, >> >> Mattia >> _______________________________________________ >> QGIS-User mailing list >> QGIS-User at lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >> >> _______________________________________________ >> QGIS-User mailing list >> QGIS-User at lists.osgeo.org >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user >> > > > -- > Srda?an pozdrav / Kind regards, > Vedran Stojnovi?. > -------------- next part -------------- An HTML attachment was scrubbed... URL: ------------------------------ Message: 5 Date: Sun, 12 Oct 2025 19:27:18 +0200 From: celati Laurent To: qgis-user Subject: [Qgis-user] Percentage of area overlaped / covered by feature of another layer Message-ID: Content-Type: text/plain; charset="utf-8" Dear all, I'm working with QGIS and, if necessary, PostGIS. I have two vector layers : - A first polygonal layer resulting from vectorization work using photointerpretation of the aerial imagery (in blue in the attached screenshot below). - A second polygonal layer in the same area resulting from segmentation of the same aerial imagery (in yellow in the attached screenshot below). [image: unnamed.png] Each feature in the two layers has a unique identifier (representing thanks to labels in the screenshot). I'd like to be able to produce a small performance indicator of the segmentation performs in faithfully matching the photointerpretation. I was thinking there's probably something that could be done with geoprocessing (union, intersection?) and a area calculation ? An indicator of segmentation performance could be: for each photo-interpreted feature/polygon, calculate the percentage of the surface area covered by the feature in the segmentation layer with the biggest overlap ? To be more specific, in the example screenshot, this could be: "For feature 11 in photo-interpretation layer (blue), I would like to know the percentage of the surface area covered by the feature in the segmentation layer that has the highest overlap with this feature 11 (in this specific case, it's probably feature 42 in yellow)." This could be: area of feature 42 overlapping feature 11 / total area of feature 11? I don't know if I'm on the right path. How could we translate/reach this needs toward a QGIS and/or PostGIS tool? Thanks so much -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: unnamed.png Type: image/png Size: 141640 bytes Desc: not available URL: ------------------------------ Subject: Digest Footer _______________________________________________ QGIS-User mailing list QGIS-User at lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user ------------------------------ End of QGIS-User Digest, Vol 236, Issue 5 ***************************************** From clhermansen at gmail.com Sun Oct 12 17:33:47 2025 From: clhermansen at gmail.com (chris hermansen) Date: Sun, 12 Oct 2025 17:33:47 -0700 Subject: [Qgis-user] Percentage of area overlaped / covered by feature of another layer In-Reply-To: References: Message-ID: Laurent and list, On Sun, Oct 12, 2025, 10:27 celati Laurent via QGIS-User < qgis-user at lists.osgeo.org> wrote: > Dear all, > > I'm working with QGIS and, if necessary, PostGIS. > I have two vector layers : > > - A first polygonal layer resulting from vectorization work using > photointerpretation of the aerial imagery (in blue in the attached > screenshot below). > - A second polygonal layer in the same area resulting from segmentation > of the same aerial imagery (in yellow in the attached screenshot below). > > [image: unnamed.png] > > > Each feature in the two layers has a unique identifier (representing > thanks to labels in the screenshot). > > I'd like to be able to produce a small performance indicator of the > segmentation performs in faithfully matching the photointerpretation. I was > thinking there's probably something that could be done with geoprocessing > (union, intersection?) and a area calculation ? An indicator of > segmentation performance could be: for each photo-interpreted > feature/polygon, calculate the percentage of the surface area covered by > the feature in the segmentation layer with the biggest overlap ? > To be more specific, in the example screenshot, this could be: > "For feature 11 in photo-interpretation layer (blue), I would like to know > the percentage of the surface area covered by the feature in the > segmentation layer that has the highest overlap with this feature 11 (in > this specific case, it's probably feature 42 in yellow)." > > This could be: area of feature 42 overlapping feature 11 / total area of > feature 11? > > I don't know if I'm on the right path. How could we translate/reach this > needs toward a QGIS and/or PostGIS tool? > One way to do this is an intersection of the two polygon layers, using ST_intersection. This will create a bunch of "sliver" polygons with the ID pair (for example) and the area of the sliver. You will want to sum the area grouping by the two layer ids as in general the boundary on one layer may be split into several pieces by the boundary on the other layer. You can put that in a temporary table called slivers. You don't need the geometry, just the polygon ids from each layer and the area of intersection. Your table might look something like this: interp_id | segment_id | area -----------+------------+------ 1 | 1 | 15 1 | 2 | 0.2 1 | 3 | 0.1 1 | 4 | 0.2 2 | 1 | 0.2 2 | 2 | 12 2 | 3 | 0.1 2 | 4 | 0.1 Then you can do something like this: select slivers.interp_id,sum(slivers.area) differentials from slivers where slivers.area != (select max(others.area) from slivers as others where others.interp_id = slivers.interp_id group by slivers.interp_id) group by slivers.interp_id; select slivers.interp_id,sum(slivers.area) congruencies from slivers where slivers.area = (select max(others.area) from slivers as others where others.interp_id = slivers.interp_id group by slivers.interp_id) group by slivers.interp_id; which would produce something like this: interp_id | differentials -----------+--------------- 1 | 0.5 2 | 0.4 (2 rows) interp_id | congruencies -----------+-------------- 1 | 15 2 | 12 (2 rows) Of course, the above two select statements will produce an error in the (edge) case where the sum of the bits of non-overlap are exactly equal to the overlap in area. You can further join the sum of all areas in each interpreted polygon to the two selects above if you want to calculate a percent of differentials and congruencies. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: unnamed.png Type: image/png Size: 141640 bytes Desc: not available URL: From nyall.dawson at gmail.com Sun Oct 12 18:17:14 2025 From: nyall.dawson at gmail.com (Nyall Dawson) Date: Mon, 13 Oct 2025 11:17:14 +1000 Subject: [Qgis-user] Percentage of area overlaped / covered by feature of another layer In-Reply-To: References: Message-ID: On Mon, 13 Oct 2025 at 03:28, celati Laurent via QGIS-User < qgis-user at lists.osgeo.org> wrote: > > I don't know if I'm on the right path. How could we translate/reach this > needs toward a QGIS and/or PostGIS tool? > There's a built-in tool "Overlap Analysis" available from the processing toolbox which will help here. Nyall > > Thanks so much > _______________________________________________ > QGIS-User mailing list > QGIS-User at lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: