Re: [gdal-dev] Potential bug or misunderstanding. Please help
Would an in-memory /vsi also work as an intermediate? Expressed as windows CMD batch file I have handy: gdalwarp -of vrt –t_srs epsg:3578 %1 /vsistdout | gdal_translate /vsistdin/ %2 I should add that I use this like: project-to-local.bat input.tif outfile.tif -Matt ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Potential bug or misunderstanding. Please help
Would an in-memory /vsi also work as an intermediate? Expressed as windows CMD batch file I have handy: gdalwarp -of vrt –t_srs epsg:3578 %1 /vsistdout | gdal_translate /vsistdin/ %2 -Matt From: gdal-dev On Behalf Of Even Rouault Sent: January 19, 2022 9:00 AM To: Billy Babis ; gdal-dev@lists.osgeo.org Subject: Re: [gdal-dev] Potential bug or misunderstanding. Please help Billy, bandList is currently ignored in the separate=True case. This would be a reasonable enhancement request that you could file on https://github.com/OSGeo/gdal/issues/new<https://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%2f%2fgithub.com%2fOSGeo%2fgdal%2fissues%2fnew=8E1E185C-D5F1-7B05-A573-C40D9183224D=c132af8ee7c9d1278d61a701569070a095ce962e-963983d70993dd628f3a829c6da1de9b915a8a43> One of the workaround for now is to postedit the generate VRT file and substitute the 1 element with 2 You could also use use gdal.Translate() to produce a VRT with the second band of each source file, and run gdal.BuildVRT() on those files, but that would produce temporary files. If you don't need to serialize the output_vrt_fname, but use the returned dataset object with other APIs in the same process, you could avoid actual file creation by using an empty name for those intermediate VRT files, get the returned dataset object, and pass an array with those dataset objects instead of lst_of_input_geotiff_files. Even Le 19/01/2022 à 16:51, Billy Babis a écrit : Hi there. Given 3 input geotiffs (each with 2 bands), I want to create 1 geotiff with 3 bands (the 2nd band from each aforementioned geotiff). This should be quite simple using gdal.BuildVRT and gdal.translate. But, gdal.BuildVRT will not allow me to select the 2nd band from each input image. The following code produces the following warning: Code: gdal.BuildVRT(output_vrt_fname, lst_of_input_geotiff_files, separate=True, bandList=[2]) Warning: "fname.tif has 2 bands. Only the first one will be taken into account for the -separate case" Of course, I do not want to only use the first band, I want to use the 2nd band to create the VRT. Please let me know what I'm doing wrong and how I can fix it. Best, Billy B -- Billy Babis PhD Candidate: Environmental Economics & Policy (ABD) Computer Science B.S. 1-(908)-403-2006 ___ gdal-dev mailing list gdal-dev@lists.osgeo.org<mailto:gdal-dev@lists.osgeo.org> https://lists.osgeo.org/mailman/listinfo/gdal-dev -- http://www.spatialys.com<https://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=http%3a%2f%2fwww.spatialys.com=8E1E185C-D5F1-7B05-A573-C40D9183224D=c132af8ee7c9d1278d61a701569070a095ce962e-922e18d95be76772930fc905d0f7d174629efcdc> My software is free, but my time generally not. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Potential bug or misunderstanding. Please help
Billy, bandList is currently ignored in the separate=True case. This would be a reasonable enhancement request that you could file on https://github.com/OSGeo/gdal/issues/new One of the workaround for now is to postedit the generate VRT file and substitute the 1 element with 2 You could also use use gdal.Translate() to produce a VRT with the second band of each source file, and run gdal.BuildVRT() on those files, but that would produce temporary files. If you don't need to serialize the output_vrt_fname, but use the returned dataset object with other APIs in the same process, you could avoid actual file creation by using an empty name for those intermediate VRT files, get the returned dataset object, and pass an array with those dataset objects instead of lst_of_input_geotiff_files. Even Le 19/01/2022 à 16:51, Billy Babis a écrit : Hi there. Given 3 input geotiffs (each with 2 bands), I want to create 1 geotiff with 3 bands (the 2nd band from each aforementioned geotiff). This should be quite simple using gdal.BuildVRT and gdal.translate. But, gdal.BuildVRT will not allow me to select the 2nd band from each input image. The following code produces the following warning: *Code:* gdal.BuildVRT(output_vrt_fname, lst_of_input_geotiff_files, separate=True, bandList=[2]) *Warning:* "fname.tif has 2 bands. Only the first one will be taken into account for the -separate case" Of course, I do not want to only use the first band, I want to use the 2nd band to create the VRT. Please let me know what I'm doing wrong and how I can fix it. Best, Billy B -- Billy Babis PhD Candidate: Environmental Economics & Policy (ABD) Computer Science B.S. 1-(908)-403-2006 ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev -- http://www.spatialys.com My software is free, but my time generally not. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Potential bug or misunderstanding. Please help
Hi there. Given 3 input geotiffs (each with 2 bands), I want to create 1 geotiff with 3 bands (the 2nd band from each aforementioned geotiff). This should be quite simple using gdal.BuildVRT and gdal.translate. But, gdal.BuildVRT will not allow me to select the 2nd band from each input image. The following code produces the following warning: *Code:* gdal.BuildVRT(output_vrt_fname, lst_of_input_geotiff_files, separate=True, bandList=[2]) *Warning:* "fname.tif has 2 bands. Only the first one will be taken into account for the -separate case" Of course, I do not want to only use the first band, I want to use the 2nd band to create the VRT. Please let me know what I'm doing wrong and how I can fix it. Best, Billy B -- Billy Babis PhD Candidate: Environmental Economics & Policy (ABD) Computer Science B.S. 1-(908)-403-2006 ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
