I just installed the latest update to Qgis (3.32.1-3) and noticed there was a GDAL update so I tried clipping an ecw to mask and it appears to work now.
From: Michael Dufty Sent: Thursday, July 27, 2023 12:53 PM To: qgis-user@lists.osgeo.org Subject: RE: [Qgis-user] Clipping ecw to mask not working To respond to Kirk and Andrea’s comments. Yes it works fine on geotiff, including geotiff created be exporting the ecw using qgis. Not always a desirable workaround when dealing with very big ecws. It is on Windows 10. GDAL 3.7.1-1 from OSGEO installer The ecw displays fine in QGIS. Output layer is set to Byte to match the source Would be good to know if it works for anyone else. I thought I would try with a QGIS/GDAL generated ecw to see if that helps, but don’t seem to be able to generate an ecw either. If I use the export layer command to generate one it says it ran successfully but no file is generated. If I use translate(convert format) it does give error messages as below. Not sure if it is the same issue. Is GDAL now using the newer ecw sdk that doesn’t support unlicensed writing? Might need to go back to Manifold for these things. QGIS version: 3.32.1-Lima QGIS code revision: 4a078ecf63 Qt version: 5.15.3 Python version: 3.9.5 GDAL version: 3.7.1 GEOS version: 3.12.0-CAPI-1.18.0 PROJ version: Rel. 9.2.1, June 1st, 2023 PDAL version: 2.5.5 (git-version: a7569c) Algorithm started at: 2023-07-27T12:43:23 Algorithm 'Translate (convert format)' starting… Input parameters: { 'COPY_SUBDATASETS' : False, 'DATA_TYPE' : 0, 'EXTRA' : '', 'INPUT' : 'W:/Catalyst/GIS Common/Spatial Data/Aerial Imagery/croptest.tif', 'NODATA' : None, 'OPTIONS' : '', 'OUTPUT' : 'W:/Catalyst/GIS Common/Spatial Data/Aerial Imagery/croptest.ecw', 'TARGET_CRS' : None } GDAL command: gdal_translate -of ECW "W:\\Catalyst\\GIS Common\\Spatial Data\\Aerial Imagery\\croptest.tif" "W:/Catalyst/GIS Common/Spatial Data/Aerial Imagery/croptest.ecw" GDAL command output: ERROR 1: None of ECW_ENCODE_KEY and ECW_ENCODE_COMPANY were provided. Both are required. Process returned error code 1 Execution completed in 0.10 seconds Results: {'OUTPUT': 'W:/Catalyst/GIS Common/Spatial Data/Aerial Imagery/croptest.ecw'} Loading resulting layers The following layers were not correctly generated. • W:/Catalyst/GIS Common/Spatial Data/Aerial Imagery/croptest.ecw You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm. Michael Dufty From: QGIS-User <qgis-user-boun...@lists.osgeo.org<mailto:qgis-user-boun...@lists.osgeo.org>> On Behalf Of Kirk Schmidt via QGIS-User Sent: Thursday, July 27, 2023 12:00 AM To: qgis-user@lists.osgeo.org<mailto:qgis-user@lists.osgeo.org> Subject: Re: [Qgis-user] Clipping ecw to mask not working Hi Michael: Enhance Compression Wavelet (ECW) is a proprietary compression format. I would try exporting your image as a geotiff to see if it is being read correctly and does not have internal write protection on it. Kirk Schmidt On 7/26/2023 2:02 AM, Michael Dufty via QGIS-User wrote: I'm having issues trying to clip ecw images to a mask layer. Using raster-extraction-clip raster to mask layer. Default parameters. The tool runs extremely quickly (successfullyin 0.12 seconds), but produces a raster entirely black (0,0,0 for all pixels). With the correct extent of the mask layer. If I tick the box to create an alpha output band it produces an entirely transparent result. Source and mask layers both in EPSG 28350 Anyone else having this issue? I cannot see any bug reports. Tried in 328.8, 3.28.9, 3.32.0 and 3.32.1 with same result. Seems to work fine if input raster is a tif. _______________________________________________ QGIS-User mailing list QGIS-User@lists.osgeo.org<mailto:QGIS-User@lists.osgeo.org> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user -- Kirk Schmidt, MScF, BScF, RPF General Manager Nortek Resource Solutions Inc. 26 Church Road Sutherlands River, NS B0K 1W0 Tel (902) 922.3607 Email: k...@nortekresources.com<mailto:k...@nortekresources.com> Web: www.nortekresources.com<http://www.nortekresources.com>
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