[GRASS-user] <v.triangle> -- module to produce TIN with "breaklines" using <Triangle> utility

Alexander Muriy amuriy at gmail.com
Fri Apr 20 15:42:10 EDT 2012

Hi all.

I wrote a shell-script module <v.triangle> that is "front-end" for the
famous <Triangle> utility (http://www.cs.cmu.edu/~quake/triangle.html) of
J.R. Shewchuk. I'm planning to add it to GRASS-Addons wiki page :)

<Triangle> makes exact Delaunay triangulations, constrained Delaunay
triangulations, conforming Delaunay triangulations and high-quality
triangular meshes. On GIS terminology, it produces 2D TIN, optionally with

Link:  https://raw.github.com/amuriy/GRASS-scripts/master/v.triangle

P.S. It generally works but centroids in final TIN have "0" heights. Now I
think about some hack to make the right centroids in all areas of TIN.

Comparison of the one resulting TIN with the TIN produced in ArcView 3D
Analyst see in linked PDF (
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