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


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


raster, landscape structure analysis, patch index
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
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)


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


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.


r.li r.le


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