[gdal-dev] Image compositing in VRT files

[Even Rouault]

Le lundi 14 février 2011 22:09:20, Alain Cembro a écrit :
> No other answers ! Does it mean that it is not possible ?

Indeed, I don't believe that image compositing based on alpha band is possible 
with VRT. You could have some success if you used a RGB image with NODATA 
instead.

Otherwise to composite RGB images with RGBA images, you have to use gdalwarp 
and produce a "normal" output image (like GeoTIFF)


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