[gdal-dev] Processing GRIB files- error in geolocation

[Frank Warmerdam]

António Rocha wrote:
> Greetings
> 
> I'm using GDAL to pre-process a few GRIB files and compare it with 
> tkdegrib and I realized that GDAL processing GRIBs have a displacement 
> of a nearly 0,5 pixel SE. I'm using GDAL 1.7.1, released 2010/02/08 . Is 
> there any fix for this issue/problem?

António,

You could try filing a ticket with the file, and a description of why
you are convinced it is off by half a pixel.  Keep in mind that GDAL's
georeferencing model has the origin at the top left corner of the top
left pixel while some raster data/products treats the origin as being at
the center of the top left pixel (or you can think of it as considering
the pixels as point).

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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