[Qgis-user] Polygonize - No result

[Nicolas Cadieux]

Hi,
I think you need to add the gdal path in the QGIS defaults.  Look in the earlier emails and search for “No module named”. I seen others have similar problems in the last few weeks.

Nicolas Cadieux

> Le 5 janv. 2020 à 15:43, Lene Fischer <lfi at ign.ku.dk> a écrit :
> 
> Hi
> I´m trying to run Vector to raster (polygonize)
> 
> Suspect it´s the path to GDAL.
> I get this error message
> 
> QGIS version: 3.10.1-A Coruña
> QGIS code revision: ef24c526da
> Qt version: 5.11.2
> GDAL version: 3.0.2
> GEOS version: 3.8.0-CAPI-1.13.1 
> PROJ version: Rel. 6.2.1, November 1st, 2019
> Processing algorithm…
> Algorithm 'Polygonize (raster to vector)' starting…
> Input parameters:
> { 'BAND' : 1, 'EIGHT_CONNECTEDNESS' : False, 'EXTRA' : '', 'FIELD' : 'DN', 'INPUT' : 'C:/gis/nysted_raster/1_7m.tif', 'OUTPUT' : 'TEMPORARY_OUTPUT' }
> 
> GDAL command:
> python3 -m gdal_polygonize C:\gis\nysted_raster\1_7m.tif C:/gis/temp/processing_dc13c7a2a0cf4d22aef37dcd462534db/e5db8073dc414a989e176ea591f28c1c/OUTPUT.gpkg -b 1 -f "GPKG" OUTPUT DN
> GDAL command output:
> '\\a00143.science.domain\dlt265\Documents'
> 
> CMD.EXE was started with the above path as the current directory.
> 
> UNC paths are not supported. Defaulting to Windows directory.
> 
> C:\PROGRA~1\QGIS3~1.10\bin\python3.exe: No module named gdal_polygonize
> 
> Execution completed in 0.33 seconds
> Results:
> {'OUTPUT': 'C:/gis/temp/processing_dc13c7a2a0cf4d22aef37dcd462534db/e5db8073dc414a989e176ea591f28c1c/OUTPUT.gpkg'}
> 
> Loading resulting layers
> The following layers were not correctly generated.<ul><li>C:/gis/temp/processing_dc13c7a2a0cf4d22aef37dcd462534db/e5db8073dc414a989e176ea591f28c1c/OUTPUT.gpkg</li></ul>You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm.
> 
> Regards
> 
> 
> 
> Lene Fischer
> Associate Professor
> 
> University of Copenhagen
> Department of Geoscience and Natural Resource Management
> Forest and Landscape College
> Nødebovej 77a
> 3480 Fredensborg
> Denmark
> 
> 
> MOB +45 40115084
> lfi at ign.ku.dk
> 
> 
>   
> 
> 
> 
> 
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