[Geotiff] GeoTIFF spec - ModelTransformTag is not invertible

Frank Warmerdam warmerdam at pobox.com
Sun Feb 4 17:50:11 PST 2007

Niles Ritter wrote:
> Summary:
> ----------
> GeoTIFF files which have a zero on the (3,3) coordinate in
> the ModelTransformTag is perfectly valid GeoTIFF, even
> though the matrix is not invertible. GeoTIFF readers 
> should not crash on encountering this situation.

Niles / Ed,

I am open to specific suggested changes to clarify this in the document,
or perhaps also in the FAQ.

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

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