[Gdal-dev] Changing a color in palette

darrepac pascal.darre at laposte.net
Fri Jan 23 16:49:47 EST 2009


If I have to do a script in Python, I will do it!
So yes please, I would like to see an example

thanks


Frank Warmerdam wrote:
> 
> darrepac wrote:
>> Hello
>> 
>> I have a set of geotiff 8bits file.
>> I would like to change 1 color of the palette: puting the color
>> 255,255,255
>> in the index 123 instead of color  255,0,255. While not touching anything
>> else.
>> 
>> Is there a way to do this? because I have a big set of files and I did
>> not
>> find any tool which permit batch processing and keep the geo information.
> 
> Darre,
> 
> It should be quite practical to do this with a small python script, but,
> you
> may need to use the trunk version of GDAL to get this functionality. 
> There
> was recently a bunch of work done to support more dynamic altering of tiff
> colormaps that you might require.
> 
> I could provide a sample script to do this if you are interested.
> 
> 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    | Geospatial Programmer for Rent
> 
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> 
> 

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