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Version: 332601 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

NAME - Calculates standard deviation of patch area a raster map


raster, landscape structure analysis, patch index

SYNOPSIS help map=name conf=string output=name [--overwrite] [--verbose] [--quiet]



Allow output files to overwrite existing files

Verbose module output

Quiet module output



Name of input raster map

Configuration file

Name for output raster map

DESCRIPTION (patch area distribution standard deviation) calculates as:
MPS: mean patch area size
ai: area of patch i
Npatch: number of patch


To calculate mean pixel attribute index on map my_map, using my_conf configuration file and saving results in my_out file run: map=my_map conf=my_conf output=my_out


Do not use absolute path names for output files. They are raster if moving window disposition was selected, otherwise they are in ~/ folder.
If input raster is not full of null values returns a value >=0 that is PADsd.
If input raster is full of null values returns -1.
If you want to have null values instead run

r.null setnull=-1 map=my_map
after index calculation.


McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. USDA For. Serv. Gen. Tech. Rep. PNW-351.



Serena Pallecchi student of Computer Science University of Pisa (Italy).
Commission from Faunalia Pontedera (PI), Italy (


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Last changed: $Date: 2007-02-08 17:26:08 +0100 (gio, 08 feb 2007) $

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