r.li.padcv(1)

1r.li.padcv(1)                 Grass User's Manual                r.li.padcv(1)
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NAME

6       r.li.padcv   -  Calculates  coefficient of variation of patch area on a
7       raster map
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KEYWORDS

10       raster, landscape structure analysis, patch index
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SYNOPSIS

13       r.li.padcv
14       r.li.padcv help
15       r.li.padcv map=name conf=string output=name  [--overwrite]  [--verbose]
16       [--quiet]
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18   Flags:
19       --overwrite
20           Allow output files to overwrite existing files
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22       --verbose
23           Verbose module output
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25       --quiet
26           Quiet module output
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28   Parameters:
29       map=name
30           Name of input raster map
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32       conf=string
33           Configuration file
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35       output=name
36           Name for output raster map
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DESCRIPTION

39       r.li.padcv  (patch  area  distribution coefficient of variation) calcu‐
40       lates as:
41       with:
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43                     SD: standard deviation of patch area size
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45                     MPS: mean patch area size
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47                     ai: area of patch i
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49                     Npatch: number of patch
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REFERENCES

52       McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analy‐
53       sis  program for quantifying landscape structure. USDA For. Serv.  Gen.
54       Tech. Rep. PNW-351.
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EXAMPLES

57       To calculate mean pixel attribute index on map  my_map,  using  my_conf
58       configuration file and saving results in my_out file run:
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60       r.li.padcv map=my_map conf=my_conf output=my_out
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NOTES

64       Do  not  use  absolute  path names for output files. They are raster if
65       moving  window  disposition  was  selected,  otherwise  they   are   in
66       ~/.r.li/output folder.
67       If  input  raster is not full of null values r.li.padcv returns a value
68       >=0 that is PADcv.
69       If input raster is full of null values r.li.padcv returns -1.
70       If you want to have null values instead run
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72       r.null setnull=-1 map=my_map
73        after index calculation.
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AUTHORS

79       Serena  Pallecchi  student  of  Computer  Science  University  of  Pisa
80       (Italy).
81       Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)
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BUGS

84       Please send bugs reports to pallecch@cli.di.unipi.it
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86       Last changed: $Date: 2007-02-08 17:52:53 +0100 (Thu, 08 Feb 2007) $
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88       Full index
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90       © 2003-2008 GRASS Development Team
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94GRASS 6.3.0                                                      r.li.padcv(1)