Hi, Try
gdal_translate "WMS:https://maps-public.geo.nyu.edu:443/geoserver/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=sdr%3Anyu_2451_43745&SRS=EPSG:4326&BBOX=-119.265762329102,35.2621765136719,-118.825294494629,35.4424705505371&format=image/png&transparent=TRUE"; service.xml -of WMS Notice the the format must be something that supports transparency so image/jpeg does not work. -Jukka Rahkonen- Carl Godkin-2 wrote > Hi, > > I'm generating WMS service description files as described here: > https://gdal.org/drivers/raster/wms.html#generation-of-wms-service-description-xml-file > > This works well, but I wonder if there's a way to request the image from > the WMS server to be transparent. > > If I use gdal_translate to create the WMS service description file like > this: > > gdal_translate "WMS: > https://maps-public.geo.nyu.edu:443/geoserver/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=sdr%3Anyu_2451_43745&SRS=EPSG:4326&BBOX=-119.265762329102,35.2621765136719,-118.825294494629,35.4424705505371"; > service.xml -of WMS > > then I get this: > <GDAL_WMS> > > <Service name="WMS"> > > <Version> > 1.1.1 > </Version> > > <ServerUrl> > https://maps-public.geo.nyu.edu:443/geoserver/wms?SERVICE=WMS > </ServerUrl> > > <Layers> > sdr%3Anyu_2451_43745 > </Layers> > > <SRS> > EPSG:4326 > </SRS> > > <ImageFormat> > image/jpeg > </ImageFormat> > > <Transparent> > FALSE > </Transparent> > > <BBoxOrder> > xyXY > </BBoxOrder> > > </Service> > > <DataWindow> > > <UpperLeftX> > -119.265762329102 > </UpperLeftX> > > <UpperLeftY> > 35.4424705505371 > </UpperLeftY> > > <LowerRightX> > -118.825294494629 > </LowerRightX> > > <LowerRightY> > 35.2621765136719 > </LowerRightY> > > <SizeX> > 1073741824 > </SizeX> > > <SizeY> > 439508252 > </SizeY> > > </DataWindow> > > <BandsCount> > 3 > </BandsCount> > > <BlockSizeX> > 1024 > </BlockSizeX> > > <BlockSizeY> > 1024 > </BlockSizeY> > > <OverviewCount> > 20 > </OverviewCount> > </GDAL_WMS> > I have discovered that if I slightly edit three lines the service > description like this: > > > <ImageFormat> > image/geotiff > </ImageFormat> > > <Transparent> > TRUE > </Transparent> > > <BandsCount> > 4 > </BandsCount> > then my output image is transparent if I compare these two output files: > > gdal_translate -outsize 512 512 -projwin -119.1 35.4 -119 35.3 service.xml > bakersfield.tif > gdal_translate -outsize 512 512 -projwin -119.1 35.4 -119 35.3 > service_trans.xml bakersfield_trans.tif > > Are there some options I can use in the first gdal_translate command above > to generate the WMS description file so that > it retrieves transparent images if the server supports transparency? > > (I am actually creating the service description file in C++ code using > CreateCopy, but I believe it's easy to prototype with the CLI.) > > Thanks very much, > > carl > > _______________________________________________ > gdal-dev mailing list > gdal-dev@.osgeo > https://lists.osgeo.org/mailman/listinfo/gdal-dev -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
