[Gdal-dev] Does GeoTIFF support LocalCS?

[Frank Warmerdam]

Ray Gardener wrote:
> Has anyone been able to use local CS with GeoTIFF? The best I can get 
> GDAL to do is write an associated .tfw file out okay, but when reading 
> back in, GetProjectionRef() in 1.4.1 returns
> 
>   GEOGCS["unnamed", DATUM["unknown",
>    SPHEROID["unretrievable... UNITS["degrees"...
> 
> Since the units (in my case, meters) are replaced with degrees, 
> intepreting a "null" geogcs as localcs doesn't help.
> 
> Does the GeoTIFF format support localcs? If so, I'd prefer to mod the 
> driver to actually handle it.

Ray,

I suspect you are correct about LOCALCS support in geotiff.  My intention
is that LOCAL_CS should translate to geotiff as a geotransform
matrix and linear units specified in the file.  If that isn't happening
it is a bug and I'd appreciate your filing the specifics of what you see.

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