1v.hull(1)                     Grass User's Manual                    v.hull(1)
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NAME

6       v.hull   - Uses a GRASS vector points map to produce a convex hull vec‐
7       tor map.
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KEYWORDS

10       vector, geometry
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SYNOPSIS

13       v.hull
14       v.hull help
15       v.hull  [-a]   input=name   output=name    [--overwrite]    [--verbose]
16       [--quiet]
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18   Flags:
19       -a
20           Use all vector points (do not limit to current region)
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22       --overwrite
23           Allow output files to overwrite existing files
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25       --verbose
26           Verbose module output
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28       --quiet
29           Quiet module output
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31   Parameters:
32       input=name
33           Name of input vector points map
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35       output=name
36           Name of output vector area map
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DESCRIPTION

39       v.hull  computes the convex hull of a vector points map and outputs the
40       convex hull polygon as a vector area map. The convex  hull,  or  convex
41       envelope,  for  an object or a set of objects is the minimal convex set
42       containing the given objects. This module creates a vector polygon con‐
43       taining all vector points of the input map.
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45       Example of v.hull output:
46            | Convex hull polygon created with v.hull
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REFERENCES

49       M. de Berg, M. van Kreveld, M. Overmars, O. Schwarzkopf,  (2000).  Com‐
50       putational geometry, chapter 1.1, 2-8.
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SEE ALSO

53        v.delaunay
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AUTHOR

56       Andrea Aime, Modena, Italy
57       Markus Neteler, ITC-irst (update to 5.7)
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59       Last changed: $Date: 2006-05-30 11:05:37 +0200 (Tue, 30 May 2006) $
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61       Full index
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63       © 2003-2008 GRASS Development Team
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67GRASS 6.3.0                                                          v.hull(1)