Hello.
Here I am, day one as a new GRASS user and I’m stuck already! I successfully imported a DEM but when I run r.slope.aspect, I get empty slope and aspect files. What could possibly be going wrong? The DEM displays and queries properly.
THANKS for any help!
Suzanne Gunn ~ High Road GIS Services
#6-1450 Telkwa High Road, Telkwa BC V0J 2X1
(250) 846-5715 (phone & fax)
(250) 877-3087 (cell)
suzanne.gunn@citywest.ca
Suzanne wrote:
I successfully imported a DEM but when I run
r.slope.aspect, I get empty slope and aspect files. What
could possibly be going wrong? The DEM displays and
queries properly.
probably the computational region does not match the display region, and the process is happening for "thin air".
try "g.region rast=your_DEM" from the command line so that the compuational region exactly matches your DEM, or (less exact way) click on the menu item for that on the display window (magnifying glass button with pull down menu, last one)
see the short intro to raster help page:
http://grass.ibiblio.org/grass63/manuals/html63_user/rasterintro.html
good luck,
Hamish
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