Hi list! I am sort of forwarding a friends question related to hydro-processing.
While there is a proper (vector) contour map and a very clean stream network map (digitised from scratch upon topographic maps of 1:50.000) available, the flow direction map is missing. Is this information easily calculated based on available dem(s), stream network(s)? Or should _definitely_ the user add this information while digitising the streams? I have read many past threads wrt "streams, flow, direction, accumulation" but could not trace an answer to the above question. Thanks, Nikos _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user