<p>Hi,<br>
You can try r.to.rast3elev which will do exactly what you need.</p>
<p>Best<br>
Soeren</p>
<p>Am 21.02.2011 02:38 schrieb <<a href="mailto:grass@sundquist.imapmail.org">grass@sundquist.imapmail.org</a>>:<br type="attribution">> Hamish:<br>> <br>> I looked at that before and the only thing I could think of was to use<br>
> r.to.rast3 by first generating a whole series of horizontal surfaces<br>> with r.mapcalc, one for each foot of elevation, with each cell getting a<br>> value of "1" if the "elevation" for that particular new surface lied<br>
> between the corresponding cell values of the top and bottom surfaces. <br>> Then taking those whole bunch of surfaces and feeding them to<br>> r.to.rast3. But that seemed pretty inelegant. But it may be only way<br>
> to do it. I would only be about 25 rasters to generate and then merge.<br>> <br>> J.S.<br>> <br>> On Sun, 20 Feb 2011 17:14:39 -0800 (PST), "Hamish" <<a href="mailto:hamish_b@yahoo.com">hamish_b@yahoo.com</a>><br>
> said:<br>>> J.S. wrote:<br>>> > I want to generate a 3D raster (and display in nviz) that is<br>>> > the volume between two 2D elevation rasters. The application<br>>> > is to visualize the subsuraface area that will be subject to<br>
>> > environmental remediation.<br>>> <br>>> maybe this summary helps,<br>>> <a href="http://grass.osgeo.org/wiki/Help_with_3D">http://grass.osgeo.org/wiki/Help_with_3D</a><br>>> <br>>> <br>
>> Hamish<br>>> <br>>> <br>>> <br>>> <br>> _______________________________________________<br>> grass-user mailing list<br>> <a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a><br>
> <a href="http://lists.osgeo.org/mailman/listinfo/grass-user">http://lists.osgeo.org/mailman/listinfo/grass-user</a><br></p>