[Gdal-dev] src/dstnodata not effective for indexed colour

[Matt Wilkie]

> It isn't possible for me to test this right now, but I would expect that
> for your indexed input file your -srcnodata value would be the INDEX
> value you want to be treated as "no data", rather than the RGB value
> associated with that index value.

Right you are Ed. Thanks!

At one point I did try using the index # with no apparent effect. 
However on taking a close look, I found there are 2 index entries for 
255,255,255, and in my tests I was specifying an index which is not used 
  in the image by any pixels.


-- 
matt wilkie
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