[GRASS-user] From 3d vector to DEM

[Markus Neteler]

On Thu, Jan 27, 2011 at 8:53 PM, Joba <Joost.bakker at groenejoule.nl> wrote:
>
> Hello, I'm a newbee and struggling for days now to get a Google Sketchup
> drawing to a DEM.

Please tell us what this drawing is. A building or similar object?

> I'm able to import the coordinates via GML (copy paste coords from KMZ). So
> now I have a surface which I want to convert to DEM. v.surf.rst only works
> with points and isolines. Is there a smart way to produce isolines from the
> 3d-surface? Thx!

Your 3D surfaces are actually of "face" type in GRASS?

I have recently started this Wiki page:
http://grass.osgeo.org/wiki/Interpolation

It would be good to expand it to your case. Contributions welcome.

Markus