On Tue, 1 Apr 2014 00:52:53 -0700 (PDT) Helmut Kudrnovsky <[email protected]> wrote:
> hi, > > any hint or pointer to some grass gis procedure/literature/web > link/etc how to caculate valley floor width in GRASS or some index > indicating valley floor width. > > the idea is to get some measure how wide or narrow a valley is. > > thanks in advance! > That is a very involved question, starting with how you define the valley floor quantitatively to begin with. You could calculate an index of concavity or average slope and plot the point where the measure (e.g. concavity of slope, or average slope) drops below a certain value that would be a valley floor boundary by definition. There should be several grass tools that could be applied. JWDougherty _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
