[Gdal-dev] color table

[Frank Warmerdam]

Xiaodong Zhang wrote:
> Hi Frank,
> 
> I'm just wondering can I write a color table into a GeoTIFF file. I got 
> an error message saying that
> SetColorTable() not supported for existing TIFF files.
> 
> Thanks
> Xiaodong


Xiaodong,

I believe you can call SetColorTable() only on a newly created file
(created with the GDALDriver->Create() method) if you do it before writing
the first imagery.  This is a "quirk" of the TIFF library that makes it hard
to make some structural decisions (like whether an image has a color table)
after you have started writing imagery.

Best regards,

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