Provided by: grass-doc_7.8.2-1build3_all bug

NAME  - Calculates Renyi’s diversity index on a raster map


       raster, landscape structure analysis, diversity index

SYNOPSIS --help   input=name  config=name  alpha=string  output=name   [--overwrite]   [--help]
       [--verbose]  [--quiet]  [--ui]

           Allow output files to overwrite existing files

           Print usage summary

           Verbose module output

           Quiet module output

           Force launching GUI dialog

       input=name [required]
           Name of input raster map

       config=name [required]
           Configuration file

       alpha=string [required]
           Alpha value is the order of the generalized entropy

       output=name [required]
           Name for output raster map

DESCRIPTION calculates the "Renyi’s diversity index" as:

           ·   H: Renyi entropy

           ·   alpha: order of the generalized entropy

           ·   i: patch type

           ·   S: number of different patch types

           ·   pi: proportional abundance of patch type i


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

       If the input raster map contains only NULL values then returns NULL.


       To calculate Renyi’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: input=my_map conf=my_conf output=my_out alpha=0.6

       Forest map (Spearfish sample dataset) example:
       g.region raster=landcover.30m -p
       r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())" input=forests conf=movwindow7 out=forests_renyi_mov7_a06 alpha=0.6
       r.univar forests_renyi_mov7_a06

       Forest map (North Carolina sample dataset) example:
       g.region raster=landclass96 -p
       r.mapcalc "forests = if(landclass96 == 5, 1, null() )" input=forests conf=movwindow7 out=forests_renyi_mov7
       # verify
       r.univar forests_renyi_mov7 input=forests output=forests type=area
       d.mon wx0
       d.rast forests_renyi_mov7
       d.vect forests type=boundary

SEE ALSO - package overview


       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)


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


       Available at: source code (history)

       Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

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