v.delaunay(1grass) GRASS GIS User's Manual v.delaunay(1grass)
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 [layer=string] output=name [--overwrite]
[--help] [--verbose] [--quiet] [--ui]
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
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:
input=name [required]
Name of input vector map
Or data source for direct OGR access
layer=string
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
DESCRIPTION
v.delaunay uses an existing vector points map (input) to create a De-
launay triangulation vector map (output).
Delaunay triangulation example (red-yellow points are the data points
from which the triangulation was generated):
EXAMPLE
Commands used with the North Carolina dataset to create the above fig-
ure (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
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.
SOURCE CODE
Available at: v.delaunay source code (history)
Accessed: unknown
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