On Thu, 19 Apr 2012, Margherita Di Leo wrote:
Actually, I fear that nature doesn't really care about politic boundaries
No, but national data sets do. The basin to the west of the top-most white area also does not include the mouth of the main stem shown, but it's colored as a basin. Further to the southwest, is another white, non-basin that should be included. Perhaps I need to play more with the r.watershed threshold value. Thanks, Rich _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user