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v.delaunaygrass - Online in the Cloud

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This is the command v.delaunaygrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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 Delaunay 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 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

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

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