[gdal-dev] The GEOS projection and gdalwarp

[Simon R. Proud]

Hi,
I'm working with meteosat data in the GEOS projection and have been having some problems with gdalwarp.The data I'm using contains no geo-information, so I call gdalwarp with this:

gdalwarp -s_srs '+proj=geos +lon_0=0.0 +h=35785831 +x_0=0.0' -t_srs '+proj=latlong +datum=WGS84' -ts 2000 2200 -te -20.5 -40.99992 52.2272 39.0 /media/Data/ISOP.tif /home/processing/GEO.tif

This results in:
"ERROR1: Unable to compute a transformation between pixel/line and georeferenced coordinates for /media/Data/ISOP.tif.
There is no affine transformation and no GCPs."

Do you know how I could overcome this? When I convert *to* GEOS I needed to include some additional info (such as subsatellite pixel size as an argument with -tr) but I can't find how to include that info in the source projection. Any ideas/hints greatly appreciated!

Thanks,
Simon.

~~~~~~~~~~~~~~~~~~~~~~~~
Dr Simon Proud
Post-doc, Satellite Remote Sensing
University of Copenhagen

Tel: +45 35 32 25 84
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