Hi,
I use the ‘v.extrude’ module often but cannot understand why the resulting 3D geometries criss-cross on the tops and sometimes the sides of the extrusions. I have tried v.clean in the vector layer but this makes no difference. I have attached an image so that it can be seen. I have tried to use the alternative v.to.3d but this does not complete. Can anyone advise best a use practice.
Thanks,
Paul J. Shapley MSc CGeog (GIS) FRGS
Hi Paul,
On Tue, Mar 25, 2014 at 4:14 PM, Paul Shapley <p.shapley@gmail.com> wrote:
Hi,
I use the 'v.extrude' module often but cannot understand why the resulting
3D geometries criss-cross on the tops and sometimes the sides of the
extrusions.
Are the data really like that (could you extract just a single
building to check?) or is it NVIZ which behaves like that (which I
also see in my 3D data)?
I have tried v.clean in the vector layer but this makes no
difference. I have attached an image so that it can be seen. I have tried to
use the alternative v.to.3d but this does not complete. Can anyone advise
best a use practice.
To be sure where the problem is, please export them to VTK and then
visualize in Paraview (there is a Wiki page explaining that). If
Paraview shows the same, then v.extrude may have a problem while
otherwise it may be NVIZ.
Best
Markus
Thanks,
Paul J. Shapley MSc CGeog (GIS) FRGS
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