[Gdal-dev] Nodata bitmasks / null processing

[Frank Warmerdam]

Peng Gao wrote:
> One issue is not covered is the storage of the NoData bitmap for known
> formats, e.g. jpeg, bmp, and etc
> that do not
> support mask. Is there going to be a native GDAL bitmap support, sort of
> like "PAM" file for NoData bitmask?

Gao,

That is a possibility though I hadn't actually considered it previously.
A whole bitmask won't go in the .aux.xml file though, so it does make
things substantially more involved as some sort of additional data file
would be required.

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