Rechercher une page de manuel
r.li.padsd
Langue: en
Version: 371753 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
r.li.padsd - Calculates standard deviation of patch area a raster mapKEYWORDS
raster, landscape structure analysis, patch indexSYNOPSIS
r.li.padsdr.li.padsd help
r.li.padsd map=name conf=string output=name [--overwrite] [--verbose] [--quiet]
Flags:
- --overwrite
Allow output files to overwrite existing files- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- map=name
Name of input raster map- conf=string
Configuration file- output=name
Name for output raster map
DESCRIPTION
r.li.padsd (patch area distribution standard deviation) calculates as:with:
-
- MPS: mean patch area size
- ai: area of patch i
- Npatch: number of patch
- MPS: mean patch area size
EXAMPLES
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
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 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.
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.SEE ALSO
r.liAUTHORS
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.itLast changed: $Date: 2007-02-08 17:26:08 +0100 (Thu, 08 Feb 2007) $
Full index
© 2003-2008 GRASS Development Team
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre