Hello, I'm trying to put georeference information to a raster HDF file which doesn't containt projection nor geo-transformation or any GCP.
HDF is not georeferenced, but contain lot of useful metadata, so I manage to get the projection, which is Geostationnary projection ( +proj=geos). However, I don't understand how to compute GeoTransformation or GCP to geo-reference properly my image: For "classic flat" geo-referenced image, computation between pixel and lat/lon can be done by gdal_translate -a_ullr. But it's not possible with GEOS projection since the image is not "flat" ! What is the correct method to put GeoTransformation or GCP to GeoTIFF ? Below some metadata of the file that could help. Thanks, Stéphane --------------------------------------------------------------------------------------------------------------------------------------------------------------------- Projection GeoReference=+proj=geos +h=3.58011e+07 +lon_0=73.9617 +ellps=WGS84 +x_0=-5632000 +y_0=5632000 Nominal Altitude (km)=42179.2 Nominal Central Point Coordinates (degrees)=0.349082, 73.9617 Nominal X_resolution (km)=2 Nominal Y_resolution (km)=2 Nominal False Northing (km)=5632 Nominal False Easting (km)=-5632 Nominal Pixel Stepping Angle (nanoradian)=223457.048379966 Nominal Line Stepping Angle (nanoradian)=223457.048379966
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