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r.li.padcv.1grass
Langue: en
Version: 331146 (ubuntu - 24/10/10)
Section: 1 (Commandes utilisateur)
NAME
r.li.padcv - Calculates coefficient of variation of patch area on a raster mapKEYWORDS
raster, landscape structure analysis, patch indexSYNOPSIS
r.li.padcvr.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
- SD: standard deviation of patch area size
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.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.liAUTHORS
Serena Pallecchi student of Computer Science University of Pisa (Italy).Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)
BUGS
Please send bugs reports to pallecch@cli.di.unipi.itLast changed: $Date: 2007-02-08 17:52:53 +0100 (gio, 08 feb 2007) $
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