[GRASS-user] r.shaded.relief Output Question

[Rich Shepard]

   Running r.shaded.relief on a 10m DEM with alt=30, azimuth=235 (the basins
are near the US-Canadian border), and zmult=2, the output looks reversed to
me (see attached .pdf). The stream channels appear to run along ridge lines
rather than valley floors, and the basin boundaries seem to be in the
valleys.

   The source map was resampled to 30 US Feet cell resolution from the
original 1 US Foot cell resolution using r.resamp.stats after 'g.region
res=30 -ap'. Might I inadvertently inverted the elevations when I coarsened
the resolution?

   Suggestions and recommendations, please.

Rich
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