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 02:13:05 -0700 (Tue, 16 Aug 2011) $

       Full index

       © 2003-2013 GRASS Development Team

GRASS 6.4.3                                                                                   r.li.padsd(1grass)