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r.li.cwed(1)		    GRASS GIS User's Manual		  r.li.cwed(1)

NAME
       r.li.cwed   -  Calculates  contrast  weighted  edge  density index on a
       raster map

KEYWORDS
       raster, landscape structure analysis, patch index

SYNOPSIS
       r.li.cwed
       r.li.cwed --help
       r.li.cwed input=name config=name	path=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=nameA [required]
	   Name	of input raster	map

       config=nameA [required]
	   Configuration file

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

       output=nameA [required]
	   Name	for output raster map

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

       with:

	   o   k: attribute

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

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

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

	   o   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

NOTES
       Do not use absolute path	names for the config and output	 file/map  pa-
       rameters.    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\App-
       Data\Roaming\GRASS7\r.li\output\		   (MS-Windows)		    or
       $HOME/.grass7/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 pos-
       sible 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.

EXAMPLES
       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

SEE ALSO
	r.li - package overview
       g.gui.rlisetup

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

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

SOURCE CODE
       Available at: r.li.cwed source code (history)

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

       A(C) 2003-2020 GRASS Development	Team, GRASS GIS	7.8.3 Reference	Manual

GRASS 7.8.3							  r.li.cwed(1)

NAME | KEYWORDS | SYNOPSIS | DESCRIPTION | NOTES | EXAMPLES | SEE ALSO | REFERENCES | AUTHORS | SOURCE CODE

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