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

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

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 the mean pixel attribute index on map my_map, using my_conf configuration  file  (previously
       defined with g.gui.rlisetup) and saving results in my_out, run:
       r.li.mpa input=my_map conf=my_conf output=my_out

       Forest map (Spearfish sample dataset) example:
       g.region raster=landcover.30m -p
       r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
       r.li.mpa input=forests conf=movwindow7 out=forests_mpa_mov7
       r.univar forests_mpa_mov7

       Forest map (North Carolina sample dataset) example:
       g.region raster=landclass96 -p
       r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
       r.li.mpa input=forests conf=movwindow7 out=forests_mpa_mov7
       # verify
       r.univar forests_mpa_mov7
       r.to.vect input=forests output=forests type=area
       d.mon wx0
       d.rast forests_mpa_mov7
       d.vect forests type=boundary

       raster, landscape structure analysis, patch index

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

       Do not use absolute path names for the config and output file/map parameters.   If  the  "moving  window"
       method was selected in g.gui.rlisetup, then the output will be a raster map, otherwise an ASCII file will
       be   generated   in   the   folder  C:\Users\userxy\AppData\Roaming\GRASS8\r.li\output\  (MS-Windows)  or
       $HOME/.grass8/r.li/output/ (GNU/Linux).

       If the input raster map contains only NULL values then r.li.mpa considers to have 0 patches.
       If area is 0 r.li.mpa returns -1; it is possible only if the raster is masked
       If you want to change these -1 values to NULL, run subsequently on the resulting map:
       r.null setnull=-1 input=my_map
       after index calculation.

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

r.li-packageoverview,g.gui.rlisetup

       Available at: r.li.mpa source code (history)

       Accessed: Friday Apr 04 01:19:18 2025

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       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                                     r.li.mpa(1grass)

r.li.mpar.li.mpa--helpr.li.mpainput=nameconfig=nameoutput=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:--overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:input=name[required]
           Name of input raster map

       config=name[required]
           Configuration file

       output=name[required]
           Name for output raster map