I am not certain about the description files but you should be aware that jpeg is not able to have transparency. It always needs to be an image format capable of alpha channel (like png or tiff). Some servers can interpret a specific RGB (like 0,0,0) as transparent but that has drawbacks if that color happens to be in the image by nature.
Best
Lars
_______________________________________________ gdal-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/gdal-dev
