Provided by: grass-doc_6.4.3-3_all
NAME
r.li.padcv - Calculates coefficient of variation of patch area on a raster map
KEYWORDS
raster, landscape structure analysis, patch index
SYNOPSIS
r.li.padcv r.li.padcv help r.li.padcv map=name conf=string output=name [--overwrite] [--verbose] [--quiet] Flags: --overwrite Allow output files to overwrite existing files --verbose Verbose module output --quiet Quiet module output Parameters: map=name Name of input raster map conf=string Configuration file output=name Name for output raster map
DESCRIPTION
r.li.padcv (patch area distribution coefficient of variation) calculates as: with: SD: standard deviation of patch area size MPS: mean patch area size ai: area of patch i Npatch: number of patch
EXAMPLES
To calculate mean pixel attribute index on map my_map, using my_conf configuration file and saving results in my_out file run: r.li.padcv map=my_map conf=my_conf output=my_out
NOTES
Do not use absolute path names for output files. They are raster if moving window disposition was selected, otherwise they are in ~/.r.li/output folder. If input raster is not full of null values r.li.padcv returns a value >=0 that is PADcv. If input raster is full of null values r.li.padcv returns -1. If you want to have null values instead run r.null setnull=-1 map=my_map after index calculation.
SEE ALSO
r.li
REFERENCES
McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. USDA For. Serv. Gen. Tech. Rep. PNW-351.
AUTHORS
Serena Pallecchi student of Computer Science University of Pisa (Italy). Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it) Last changed: $Date: 2011-08-16 02:13:05 -0700 (Tue, 16 Aug 2011) $ Full index © 2003-2013 GRASS Development Team