Christian Braun wrote: > Hi, > > ok I had to learn that you can't compare the results of r.terraflow and > r.watershed regarding the watershed generation. I think r.watershed gives me > the better results, so I will try to use this module. > But I still have the problem with r.thin to get rid of the linear features > describing watersheds. The pics I had attached are, of course, the results > of thining my watersheds of r.terraflow. First pic result watersheds of > r.terraflow, second pic the thining result.
Christian Forgive me if I got you wrong, but are you by any chance running r.thin on a raster map made of adjacent watershed polygons? Please note that r.thin is supposed to be used for thinning raster *line* features. The manual reads: "Thins non-zero cells that denote linear features in a raster map layer". If you need watershed borders as raster lines, you can use r.to.vect to extract watersheds as vector polygons (areas) and rasterise their boundaries with v.to.rast type=line (if this doesn't work, convert boundaries into lines first with v.type, and run v.to.rast type=line on this). Maciek _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
