.TH r.li.padsd 1grass "" "GRASS 6.4.2" "Grass User's Manual"
.SH NAME
\fI\fBr.li.padsd\fR\fR  - Calculates standard deviation of patch area a raster map
.SH KEYWORDS
raster, landscape structure analysis, patch index
.SH SYNOPSIS
\fBr.li.padsd\fR
.br
\fBr.li.padsd help\fR
.br
\fBr.li.padsd map\fR=\fIname\fR \fBconf\fR=\fIstring\fR \fBoutput\fR=\fIname\fR  [--\fBoverwrite\fR]  [--\fBverbose\fR]  [--\fBquiet\fR] 
.SS Flags:
.IP "\fB--overwrite\fR" 4m
.br
Allow output files to overwrite existing files
.IP "\fB--verbose\fR" 4m
.br
Verbose module output
.IP "\fB--quiet\fR" 4m
.br
Quiet module output
.PP
.SS Parameters:
.IP "\fBmap\fR=\fIname\fR" 4m
.br
Name of input raster map
.IP "\fBconf\fR=\fIstring\fR" 4m
.br
Configuration file
.IP "\fBoutput\fR=\fIname\fR" 4m
.br
Name for output raster map
.PP
.SH DESCRIPTION
\fIr.li.padsd\fR (patch area distribution standard deviation) calculates as:
.br
with:
.br
.RS
.IP
\fBMPS\fR: mean patch area size
.br
.IP
\fBai\fR: area of patch i
.br
.IP
\fBNpatch\fR: number of patch
.br
.RE
.SH EXAMPLES
To calculate mean pixel attribute index on map my_map, using
my_conf configuration file and saving results in
my_out file run:
.br
\fC
.DS
.br
r.li.padsd map=my_map conf=my_conf output=my_out
.br
.DE
\fR
.SH 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.
.br
If input raster is not full of null values r.li.padsd returns a value >=0 that is PADsd. 
.br
If input raster is full of null values r.li.padsd returns -1. 
.br
If you want to have null values instead run 
.br
\fC
.DS
.br
r.null setnull=-1 map=my_map
.br
.DE
\fR
after index calculation.
.SH 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.
.SH SEE ALSO
\fI
r.li
\fR
.SH AUTHORS
Serena Pallecchi student of Computer Science University of Pisa (Italy).
.br
Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)
.PP
\fILast changed: $Date: 2011-08-16 11:13:05 +0200 (Tue, 16 Aug 2011) $\fR
.PP
Full index
.PP
© 2003-2011 GRASS Development Team