
NAME
v.hull - Uses a GRASS vector points map to produce a convex hull vector map.
KEYWORDS
vector, geometry
SYNOPSIS
v.hull
v.hull help
v.hull [-a] input=name output=name [--overwrite] [--verbose] [--quiet]
Flags:
- -a
- Use all vector points (do not limit to current region)
- --overwrite
- Allow output files to overwrite existing files
- --verbose
- Verbose module output
- --quiet
- Quiet module output
Parameters:
- input=name
- Name of input vector points map
- output=name
- Name of output vector area map
DESCRIPTION
v.hull computes the convex hull of a vector points map and outputs the
convex hull polygon as a vector area map. The convex hull, or convex envelope,
for an object or a set of objects is the minimal convex set containing the
given objects. This module creates a vector polygon containing all vector
points of the input map.
Example of v.hull output:

Convex hull polygon created with v.hull
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REFERENCES
M. de Berg, M. van Kreveld, M. Overmars, O. Schwarzkopf, (2000).
Computational geometry, chapter 1.1, 2-8.
SEE ALSO
v.delaunay
AUTHOR
Andrea Aime, Modena, Italy
Markus Neteler, ITC-irst (update to 5.7)
Last changed: $Date: 2006-05-30 11:05:37 +0200 (Tue, 30 May 2006) $
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