Hi Matt, Il giorno Mon, 25 Jan 2010 20:57:58 -0600 Matt Klaric <m...@klaric.com> ha scritto:
> On Mon, Jan 25, 2010 at 8:38 PM, Frank Warmerdam > <warmer...@pobox.com>wrote: > > > I don't think the VRT approach supports actually adding > > different images together, only overlaying and rescaling. > > > > > However, pixel functions could be used in a VRT file to accomplish the > desired outcome. > > --matt Indeed, it would require a pixel function for sum and the ScaleRatio property of ComplexSource. I have just submitted a patch http://trac.osgeo.org/gdal/ticket/3367 that provides a set of standard pixel functions, including sum (of 2 or more raster bands). Using this set of functions it should be quite easy to write a python program that performs generic bands arithmetic. Best regards. -- Antonio Valentino _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
