Hi >From memory the l1b driver doesn't use enough points to get proper geolocation because it sub-samples the 51 which are provided in the l1b file. The best solution (that recommended by NOAA) is to use lagrange interpolation across the 51 points. A lagrange algorithm has been provided in the ticket you referenced but nobody has added it to gdal. I think at the moment you could consider the l1b driver broken.
Andrew
_______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
