[OSGeo-Discuss] Using v.overlay to crop 3D vector contour map - I can only get 2D output

[Markus Neteler]

(Perhaps this is better posted to a GRASS list)

On Sat, Feb 20, 2010 at 12:02 PM, Mark <mscaife at mac.com> wrote:
>
>
> I've tried using this feature but the only way I can make it work is to use
> the vector as ainput , type line and the region mask as binput type area.
> The resulting vector is only 2D. Is there a way of keeping 3D vectors over a
> specified 2D area?

I see in main.c of v.overlay (GRASS 6.4.svn):
   137      Vect_open_new(&Out, out_opt->answer, WITHOUT_Z);

To open a new file in 3D, WITH_Z needs to be used.

Markus