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

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.

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

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.

SEE ALSO
r.li

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

BUGS
Please send bugs reports to pallecch@cli.di.unipi.it

Last changed: $Date: 2010-04-08 10:16:32 +0200 (Thu, 08 Apr 2010) $

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