<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">hello friends....<br><br>I have been trying to convert a contour map to DEM map. First I opened Spearfish Location and imported the contour map(this map is of Powai city-Mumbai, India) using v.in.ogr and creating a new location by name IITBP and having set the -o option for overriding projection. But while doing that I got the following warning :<br>driver: dbf<br>database: $GISDBASE/$LOCATION_NAME/$MAPSET/dbf/<br>But the location got created successfully.<br>After this I exited Spearfish location and entered IITBP location. I just saw the region settings by g.region -m and found:<br><br>n=19.1431633152778<br>s=19.1237958119444<br>w=72.9004772163889<br>e=72.9195980877778<br>nsres=107.19300143<br>ewres=100.58320921<br>rows=20<br>cols=20<br>cells=400<br><br>After this I plotted the contour map which got displayed properly on the display window.(According to
me importing the map was correct because it got displayed properly).<br><br>Now inorder to use "r.surf.contour" I had to first convert it to raster map using "v.to.rast".<br><br>After running v.to.rast I got the resulting raster map to be faded(may be because of the resolution).Therefore I changed the Grid resolution of 2d to "0.00001" using the g.region command and re-run the v.to.rast command. Now when I plotted this raster file it was displayed on monitor perfectly. Now keeping the same resolution but zooming a small portion of the raster map (raster contour map) I ran the command "r.surf.contour". This command executed successfully and the raster map is visible in the monitor. But when i try to view this map using NVIZ it gives error saying: """"loading failed"""<br><br>I am new to GRASS somebody please help me to solve this problem.<br><br>Thanks in advance......<br><br></td></tr></table><br>