ОПИСАНИЕ

r.li.padcv (patch area distribution coefficient of variation) calculates as:

with:

SD: standard deviation of patch area size

MPS: mean patch area size
ai: area of patch i
Npatch: number of patch

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 mean pixel attribute index on map my_map, using my_conf configuration file and saving results in my_out file run:

r.li.padcv 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 not full of null values r.li.padcv returns a value >=0 that is PADcv.
If input raster is full of null values r.li.padcv 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) $