On Thu, Apr 19, 2012 at 6:26 PM, Rich Shepard <[email protected]>wrote:
> On Thu, 19 Apr 2012, Margherita Di Leo wrote: > > You can query the white cells and discover that they are null values. This >> is because r.watershed delineates only the basins that fall entirely into >> the computational region. >> > > madi, > > I believe that the basin to the west of the large white one on the top > also crosses the international boundary; Actually, I fear that nature doesn't really care about politic boundaries ;-) > I'll check. > > You didn't provide information about any mask, ... >> > > No mask set. > > ... consider to provide at least a small buffer along the ridge line in >> >> order to allow the algorithm to work properly. >> > > How do I do this? > Just enlarge the computational region sufficiently over the expected boundary of the (sub)basin. madi > > Thanks, > > > Rich > > ______________________________**_________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/**mailman/listinfo/grass-user<http://lists.osgeo.org/mailman/listinfo/grass-user> > -- Ing. Margherita Di Leo, Ph.D.
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