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   r.li.padsd (patch area distribution standard deviation) calculates as:
   [rlipadsd_formula.png]
   with:
     * MPS: mean patch area size
     * ai: area of patch i
     * Npatch: number of patch

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   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

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   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.

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

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   [1]r.li

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

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   Please send bugs reports to [2]pallecch@cli.di.unipi.it

   Last changed: $Date: 2007-02-08 10:26:08 -0600 (Ð§Ñ, 08 ÑÐµÐ² 2007) $

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References

   1. file://localhost/root/tmp/2/fin/r.li.html
   2. mailto:pallecch@cli.di.unipi.it