Sab wrote: > There is a native QGIS plugins: > http://spatialserver.net/pyqgis_1.0/contributed/shadedrelief.zip > > To activate it in QGIS: > Fetch Plugins, a new window will pop up: > Click on Repositories tab > Add 3rd Party repository > Click on Plugins > Install DEM relief Shader > > You should be able to create relief shade as TIFF format > from your dem.
note that (gdaldem/hillshade) is just based on repackaged GRASS algorithms, so a problem in one might also be seen in the other. -> see http://grass.osgeo.org/wiki/Contour_lines_to_DEM r.surf.contour is the right tool to use here, but the user should pull off peak heights from the original topo map scan so that above the top contour is not a flat mesa. also the trick shown on that page should be used to multiply by a large number before running it, and then divide afterwards, to avoid the terracing effect which is caused by r.surf.contour only working with integer heights so far. I wonder if the black-spots are a color table problem? what does r.univar say about the shaded relief map? before running v.surf.rst (or any raster op.) be sure to run g.region to set up the computational region as desired. maybe your original topo map scan gives good values to match, although you'll probably want the resolution to be a nice round number (use the g.region res=.. -a flag). Hamish _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
