ОПИСАНИЕ

r.li.shannon calculates the "shannon's diversity index" as:

with:

i: patch type
m: number of patch type
pi: proportion of the landscape occupied by patch type i

ССЫЛКИ

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

ПРИМЕРЫ

To calculate shannon's diversity index on map my_map, using my_conf configuration file and saving results in my_out file run:

r.li.shannon map=my_map conf=my_conf output=my_out

ПРИМЕЧАНИЯ

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.shannon returns -1.
If you want to have null values instead run

r.null setnull=-1 map=my_map

after index calculation.

СМ. ТАКЖЕ

r.li

АВТОРЫ

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

ИЗВЕСТНЫЕ ОШИБКИ

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

Last changed: $Date: 2007-02-08 10:52:53 -0600 (Чт, 08 фев 2007) $