NAME

       r.li.pielou  - Calculates Pielou’s diversity index on a raster map

KEYWORDS

       raster, landscape structure analysis, diversity index

SYNOPSIS

       r.li.pielou
       r.li.pielou --help
       r.li.pielou input=name config=name output=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

DESCRIPTION

       r.li.pielou  calculates the "Pielou’s diversity index" as:
       with:

           •   J: Pielou eveness index

           •   H’: Shannon index

           •   S: number of classes

NOTES

       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\GRASS7\r.li\output\  (MS-Windows)  or
       $HOME/.grass7/r.li/output/ (GNU/Linux).

       If the input raster contains NULL value cells, r.li.pielou returns NULL for these cells.

EXAMPLES

       To calculate Pielou’s diversity 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.pielou 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.pielou input=forests conf=movwindow7 out=forests_pielou_mov7
       r.univar forests_pielou_mov7

       Forest map (North Carolina sample dataset) example:
       g.region raster=landclass96 -p
       r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
       r.li.pielou input=forests conf=movwindow7 out=forests_pielou_mov7
       # verify
       r.univar forests_pielou_mov7
       r.to.vect input=forests output=forests type=area
       d.mon wx0
       d.rast forests_pielou_mov7
       d.vect forests type=boundary

SEE ALSO

        r.li - package overview
       g.gui.rlisetup

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. (PDF)

AUTHORS

       Luca Delucchi and Duccio Rocchini, Fondazione E. Mach (Italy), based on the r.li.shannon  code  developed
       by Serena Pallecchi student of Computer Science University of Pisa (Italy).

SOURCE CODE

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

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual