I'm not sure about your problems with the dxf import. But once you have
your vector elevation data the way you want it. Convert your vector
lines to a raster in GRASS then use r.surf.contour to create a dem layer
with the rasterized version of the vctor lines as your input.
My problem with the elevation contours imported from dxf is that they
have no category labels! There are 1000s of lines. How on earth do I
retrieve this information. I have seen the elevation data in the dxf
files associated with polyline information (each vertex has elevation
info). Do people label each line individually based on finding the
vertex/node in the dxf file? My dxf files are on the order of 10MB!
There must be a better way.
Mike Bender
University of Manitoba
mike@fids.ce.umanitoba.ca