r.li.edgedensity(1)

NAME
r.li.edgedensity

DESCRIPTION
r.li.edgedensity calculates:

         the density of all the edge of patch i
        or

         the density of all the edge in the sampling area if i isn't specified

with:

        k: patch type

        m: number of patch type

        n: number of edge segment of patch type k

        eik :total length of edge in landscape involving patch type k

         Area: total landscape area

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 full of null values r.li.edgedensity consider to have 0 patch.
If area is 0 r.li.edgedensity returns -1; this is possible only if input raster is masked. If you want to have null values instead run
r.null setnull=-1 map=my_map
after index calculation.

EXAMPLES
To calculate edge density index on map my_map, using my_conf configuration file and saving results in my_out file run:
r.li.edgedensity map=my_map conf=my_conf output=my_out
To calculate edge density index of patch_type 34, using my_conf configuration file and on map my_map, saving results in my_out file run:
r.li.edgedensity map=my_map conf=my_conf output=my_out patch_type=34

SEE ALSO
r.li

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.

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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