On Tue, 26 Jan 2010, Rich Shepard wrote:
Feeling irrationally exuberant that I might be able to quickly move on to hydrological modeling, I just tried running r.shaded.relief on the same raster DEM map used for the slopes, aspects, and curvatures. No joy. the relief map looks like the earlier slope and aspect ones: vertical bands of horizontal static.
Got this fixed: it was incorrect region resolution. Now I have a question about the results. The source DEM has the highest area in the southeast corner and the main stream drains northwest to the confluence with a large river. The shaded relief map, however, does not reflect this topography. Both maps have a resolution of 10m. On the shaded relief map, the drainage basin head appears as flat as the confluence area. Why might I see results like this? Do I need to interpolate the source DEM to a finer resolution before running r.shade.relief? Suggestions needed, Rich _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
