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=string output=string  [--overwrite]
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17   Flags:
18       -a  Use all vector points (do not limit to current region)
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20       --overwrite
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22   Parameters:
23       input=string
24           name of a vector points map to be input
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26       output=string
27           name of a vector area map to be output
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DESCRIPTION

30       v.hull computes the convex hull of a vector points map and outputs  the
31       convex  hull  polygon  as a vector area map. The convex hull, or convex
32       envelope, for an object or a set of objects is the minimal  convex  set
33       containing the given objects. This module creates a vector polygon con‐
34       taining all vector points of the input map.
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36       Example of v.hull output: | Convex hull polygon created with v.hull
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REFERENCES

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

43        v.delaunay
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AUTHOR

46       Andrea Aime, Modena, Italy
47       Markus Neteler, ITC-irst (update to 5.7)
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49       Last changed: $Date: 2006/05/30 09:05:19 $
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51       Full index
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55GRASS 6.2.2                                                          v.hull(1)