John, did you run
g.region rast=demmap -p first? You have to set the current region to the map (or spatial subset) to work with it. Markus John C. Tull wrote on 07/24/2007 07:19 AM: > 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 ------------------ ITC -> dall'1 marzo 2007 Fondazione Bruno Kessler ITC -> since 1 March 2007 Fondazione Bruno Kessler ------------------ _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
