[gdal-dev] Invalid GeoTransform

[Frank Warmerdam]

Chris Howell wrote:
> I've got an NTF file that I am trying to open with GDAL 1.4.4. GDal is 
> currently throwing an invalid Geo Transform (We don't supported skewed 
> datasources). Is there any way using FW tools I can repair this 
> transform to make it more GDAl friendly.

Chris,

It would be helpful to see a gdalinfo report on the problem file.

Generally speaking you can use gdalwarp to transform an image into a
north up, regularly grided image if the source is rotated, skewed, or
defined by control points.  Sometimes as simple as:

   gdalwarp in.ntf out.tif

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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and watch the world go round - Rush    | President OSGeo, http://osgeo.org