[Gdal-dev] GCPs to geo transform

[Frank Warmerdam]

Antoine Hue wrote:
> Hello,
> 
> I was wondering if it is possible to compute the geo transform given a 
> set of GCPs without warping the image?
> That's what is being done in the osgTerrain  library I am using, it is 
> warping the image to a geotiff as soon as there are GCPs without 
> checking if the source and destination CS are the same.
> 
> Thanks a lot for the GDAL, it is doing a lot for me.

Antoine,

Perhaps the GDALGCPsToGeoTransform() function would be of some use to you.
It computes an approximate geotransform from a set of GCPs.

However, there is no way to utilize this from the existing commandline
tools.  So it would only be useful if you were scripting or programming.

Best regards,
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