NAME¶
r.li.padsd - Calculates standard deviation of patch area a raster
map
KEYWORDS¶
raster, landscape structure analysis, patch index
SYNOPSIS¶
r.li.padsd
r.li.padsd help
r.li.padsd 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.padsd (patch area distribution standard deviation) calculates as:
with:
- 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.padsd 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.padsd returns a value >=0
that is PADsd.
If input raster is full of null values r.li.padsd returns -1.
If you want to have null values instead run
r.null setnull=-1 map=my_map
after index calculation.
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.
SEE ALSO¶
r.li
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 11:13:05 +0200 (Tue, 16 Aug 2011) $
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