On Tue, May 17, 2011 at 10:08 AM, Davd Leif <[email protected]> wrote: > Hey, > > > I'm new to GRASS and want to perform an r.walk analysis. I've prepared all > files grass needs, but I always get the error ERROR: Ausgabe-Rasterkarte > <ergebniskosten> nicht gefunden (keine Start-Punkte angegeben), means: no > Starting-Points are given. But I've added starting points via a shapefile. > Any ideas? > Make sure that the current region settings are correct: they must match the input elevation map g.region -p rast=myelevation # -p to print and see if everything is ok
or a subset of the input elevation map g.region n= s= e= w= align=myelevation -p # align to grid geometry of input elevation Also, the starting points must fall somewhere onto the input elevation map. You could display the starting points on top of the input elevation map and zoom to the starting points vector, that should immediately show you if the starting points fall within the extents of the input elevation map. The friction map must match the input elevation map, i.e. must have the same extents and resolution or represent a subset of the input elevation map's grid geometry. HTH, Markus M _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
