there is no georeferencing with this one, but as you say it has internal coordinates (which GDAL interprets as "geolocation arrays")
so, run it through the warper i.e. gdalwarp NETCDF:GLOBCOMPLIR_nc.2023080819:data ofn.tif With that you can (and should) set your desired extent (-te), dimensions (-ts) [or resolution -tr], and crs (-t_crs) but GDAL will produce an output that works by heuristics if you specify none (or some) of those. I did the following just for fun to see if the non-downloading pathway would work it (not sure if the config is required or not, for testing purposes I set dimension to 1024,0 which means GDAL figures out a sensible aspect ratio - just remove -ts when you're happy with the result for full resolution. ) gdalwarp --config AWS_NO_SIGN_REQUEST "YES" NETCDF:"/vsis3/noaa-gmgsi-pds/GMGSI_LW/2023/08/08/19/GLOBCOMPLIR_nc.2023080819":data -ts 1024 0 GLOBCOMPLIR_nc.2023080819_test.tif (some details might not work depending on your GDAL version) Cheers, Mike On Thu, Aug 10, 2023 at 6:30 AM Dori <izzybit...@gmail.com> wrote: > Hi, > I tried to convert the NETCDF stored in > https://noaa-gmgsi-pds.s3.amazonaws.com/index.html#GMGSI_LW/202308/08/19/GLOBCOMPLIR_nc.2023080819 > to Geotiff format using following command: > > gdal_translate 0ol GTiff -a_srs EPSG:4326 -aullr -180 -72.7 179.9 -72.7 > -co “COMPRESS=LZW” NETCDF:GLOBCOMPLIR_nc.2023080819:data ofn.tif > > ofn.tif is upside down. North latitude points are in South and viceversa. > > How can I solve this upside down output? > What causes this? > > I did notice that the points in the NETCDF file are not equidistant what > could be my issue. > > Thank you for any hint on how to go about getting the correct Geotiff > output > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Michael Sumner Software and Database Engineer Australian Antarctic Division Hobart, Australia e-mail: mdsum...@gmail.com
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