
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) $
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