matt, jpeg is a lossy format. the nodata is ignored because those pixels are no longer the same value as the nodata value.
You can add a mask band to the tiff but unfortunately aside from gdalwarp and mapserver I don't think there is any other way to read it. see http://docs.oam.osgeo.org/storage/creating.html Brian On Thu, 2011-06-16 at 10:20 -0700, Matt Wilkie wrote: > Hello, > > When I convert with gdal_translate and use jpeg compression in geotiff > format there is artifacting on the edges. It looks like nodata is being > ignored. Is there any way to avoid this? (and still use jpeg or > equivalent space-saving compression) > > > > see attached. > _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev