GRASS has 2 routines specially designed to interpolate raster maps from contours.
1. Use r.surf.contour: Convert your vector contours to raster using v.to.rast. Then create a raster map from the contours using r.surf.contour. 2. Use v.surf.rst: More sophisticated and complicated module, but will read your vector contours directly. Check the manual for details. Michael On 7/30/07 2:31 PM, "Richard Chirgwin" <[EMAIL PROTECTED]> wrote: > Since r.los only works on rasters, I need to create the raster files. > How do you create rasters starting with a set of vector contour maps? > > I tried running v.extrude, using the "Elevation" column for the > attribute. Grass processes this okay, reporting: > > Number of nodes: 197049 > Number of primitives: 197056 > Number of points: 0 > Number of lines: 0 > Number of boundaries: 0 > Number of faces: 197056 > Number of areas: 0 > Number of isles: 0 > > When I try to display the resulting map, however, I get a blank display. > Have I failed to configure something for the display of the 3D output? > > Richard Chirgwin > > __________________________________________ Michael Barton, Professor of Anthropology Director of Graduate Studies School of Human Evolution & Social Change Center for Social Dynamics & Complexity Arizona State University phone: 480-965-6213 fax: 480-965-7671 www: http://www.public.asu.edu/~cmbarton _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
