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
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.li
AUTHORS
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.it
Last changed: $Date: 2007-02-08 08:52:53 -0800 (Thu, 08 Feb 2007) $
Main index - raster index - Full index
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