On 28/10/2011 20:08, Chaitanya kumar CH wrote: > I meant the nodata value of ch00_form.tif > This *is* the nodata value of ch00_form.tif. The vrt which I posted has been generated through a simple: $ gdal_translate -of vrt ch00_form.tif ch00_form.vrt The only modifications I made was to change SimpleSource into ComplexSource, and to add the LUT. Hermann