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NAME
v.delaunay - Creates a Delaunay triangulation from an input vector map containing points or centroids.
KEYWORDS
vector, geometry, triangulation
SYNOPSIS
v.delaunay
v.delaunay help
v.delaunay [-rl] input=name output=name [--overwrite] [--verbose] [--quiet]
Flags:
- -r
- Use only points in current region
- -l
- Output triangulation as a graph (lines), not areas
- --overwrite
- Allow output files to overwrite existing files
- --verbose
- Verbose module output
- --quiet
- Quiet module output
Parameters:
- input=name
- Name of input vector map
- output=name
- Name for output vector map
DESCRIPTION
v.delaunay uses an existing vector points map (input)
to create a Delaunay triangulation vector map (output).
Delaunay triangulation and Voronoi diagram example:
Delaunay Triangulation (left pane), Voronoi diagram (center pane),
and both (right pane)
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EXAMPLE
Commands used with the Spearfish dataset to create the above figure.
g.region n=4927250 s=4919400 w=588650 e=594850
d.frame -c fr=one at=0,100,0,33.3333
d.frame -c fr=two at=0,100,33.3333,66.6667
d.frame -c fr=three at=0,100,66.6667,100
v.delaunay -lr in=archsites out=arch_delaunay
d.frame -s one
d.vect arch_delaunay
d.vect archsites color=red fcolor=red size=5 icon=basic/circle
v.voronoi -l in=archsites out=arch_voronoi
d.frame -s two
d.vect arch_voronoi type=line
d.vect archsites color=red fcolor=red size=5 icon=basic/circle
d.frame -s three
d.vect arch_voronoi type=line
d.vect arch_delaunay color=blue
d.vect archsites color=red fcolor=red size=5 icon=basic/circle
REFERENCES
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
AUTHORS
Martin Pavlovsky, Google Summer of Code 2008, Student
Paul Kelly, Mentor
Based on "dct" by Geoff Leach, Department of Computer Science, RMIT.
Last changed: $Date: 2013-03-26 14:18:08 -0700 (Tue, 26 Mar 2013) $
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