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r.li.mpa

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r.li.mpa: Calculates mean pixel attribute index on a raster map

NAME

r.li.mpa - Calculates mean pixel attribute index on a raster map

KEYWORDS

raster, landscape structure analysis, patch index
SYNOPSIS
r.li.mpa r.li.mpa help r.li.mpa 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.mpa (mean pixel attribute) calculates the average value of the attribute of all the non-null cells in the sampling area as: with: i: attribute m: number of non-null attributes in the sampling area wi: number of cells of attribute i size: size of sampling area (in cells)

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.mpa 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 full of null values r.li.mpa consider to have 0 patch. If area is 0 r.li.mpa returns -1; it is possible only if the 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 r.le

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: 2007-02-08 17:52:53 +0100 (Thu, 08 Feb 2007) $ Full index (C) 2003-2010 GRASS Development Team R.LI.MPA(1)
 
 
 

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