r.li.cwed - Calculates contrast weighted edge density 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.cwed (contrast weighted edge density) calculates the edge density between patch types specified:

       with:

           •   k: attribute

           •   m: number of non-null attributes in the sampling area

           •   eik: total length of edge in landscape between patch types i and k

           •
                dik: dissimilarity (edge contrast weight) between patch types i and k

           •   Area: total landscape area
       The input file contains a row for each couple of patch type that we want to consider in the  calculation.
       Each row must be saved using this syntax:
       patchType1,patchType2,dissimilarityBetweenPatchType1andPatchType2

       To calculate the contrast weighted edge density 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.cwed input=my_map conf=my_conf output=my_out \
                 path=/path/to/weights.csv
       Example for input "weights.csv" file:
       12,16,0.65
       44,123,0.32
       56,12,0.54
       23,66,0.99

       raster, landscape structure analysis, patch index

r.li.cwed  - Calculates contrast weighted edge density 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  sample  area contains only NULL values it is considered to have 0 patch and CWED=0. If Area is 0
       r.li.cwed returns -1.  This is only possible if the map 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.cwed source code (history)

       Accessed: Friday Apr 04 01:19:16 2025

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

GRASS 8.4.1                                                                                    r.li.cwed(1grass)

r.li.cwedr.li.cwed--helpr.li.cwedinput=nameconfig=namepath=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

       path=name[required]
           Name of file that contains the weight to calculate the index

       output=name[required]
           Name for output raster map