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v.delaunay.1grass - Man Page

Creates a Delaunay triangulation from an input vector map containing points or centroids.


vector, geometry, triangulation


v.delaunay --help
v.delaunay [-rl] input=name  [layer=string]  output=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]



Use only points in current region


Output triangulation as a graph (lines), not areas


Allow output files to overwrite existing files


Print usage summary


Verbose module output


Quiet module output


Force launching GUI dialog


input=name [required]

Name of input vector map
Or data source for direct OGR access


Layer number or name (’-1’ for all layers)
A single vector map can be connected to multiple database tables. This number determines which table to use. When used with direct OGR access this is the layer name.
Default: -1

output=name [required]

Name for output vector map


v.delaunay uses an existing vector points map (input) to create a Delaunay triangulation vector map (output).

Delaunay triangulation example (red-yellow points are the data points from which the triangulation was generated):


Commands used with the North Carolina dataset to create the above figure (subset shown in figure).

g.region n=220750 s=219950 w=638300 e=639000 -p
v.delaunay input=elev_lid792_randpts output=elev_lid792_randpts_delaunay


Leonid Guibas and Jorge Stolfi, (1985). Primitives for the Manipulation of General Subdivisions and the Computation of Voronoi Diagrams, ACM Transactions on Graphics, Vol 4, No. 2, April 1985, Pages 74-123

See Also

v.voronoi, v.hull


Martin Pavlovsky, Google Summer of Code 2008, Student
Paul Kelly, Mentor
Based on "dct" by Geoff Leach, Department of Computer Science, RMIT.

Source Code

Available at: v.delaunay source code (history)

Accessed: Tuesday May 14 13:41:09 2024

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