1v.hull(1) Grass User's Manual v.hull(1)
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6 v.hull - Uses a GRASS vector points map to produce a convex hull vec‐
7 tor map.
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10 vector, geometry
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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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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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49 M. de Berg, M. van Kreveld, M. Overmars, O. Schwarzkopf, [4m(2000). Com‐
50 putational geometry, chapter 1.1, 2-8.
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53 v.delaunay
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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)