I have been having no luck today working with DEMs in GRASS. I have
tried several sources for DEM data derived from 24k quads. I can
bring in the dem and it will draw with color as expected. If I query
the map, I do not get elevation:
449208.962656|4171350.10373||*
If I try to produce a hillshade from the map, it is blank. This is
making me a bit insane because I have done these things before
without issue. I have no problem using the dem in the spearfish dataset.
I am unable to get things working using a 24k dem from:
ftp://nas.library.unr.edu/keck/30mDEM/30mdemzip/quad1113.zip
After renaming the .dem file to alcatraz_island (although I also
tried using a NED file in another format with no name changes), I ran:
r.in.gdal input=alcatraz_island.dem output=alcatraz_island_dem
The colors are there in my region and can be changed with r.colors as
expected, but I still have nothing returned on query. I am trying to
use r.mapcalc or r.recode to derive a band along a contour, but I
only get empty files returned. Is there something simple I am
overlooking.
This happens with both 6.2.2 and 6.3cvs.
Thanks,
John Tull
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