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

NAME
       r.li.padsd  - Calculates	standard deviation of patch area a raster map

KEYWORDS
       raster, landscape structure analysis, patch index

SYNOPSIS
       r.li.padsd
       r.li.padsd --help
       r.li.padsd  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=nameA [required]
	   Name	of input raster	map

       config=nameA [required]
	   Configuration file

       output=nameA [required]
	   Name	for output raster map

DESCRIPTION
       r.li.padsd calculates the standard deviation of	patch  area  sizes  in
       hectares	as:
       with:

	   o   MPS: mean patch area size

	   o   ai: area	of patch i

	   o   Npatch: number of patches

       This  index is calculated using a 4 neighbour algorithm,	diagonal cells
       are ignored when	tracing	a patch.

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\GRASS8\r.li\output\		   (MS-Windows)		    or
       $HOME/.grass8/r.li/output/ (GNU/Linux).

       The result is NULL if the sample	area contains only NULL	values.

EXAMPLES
       To  calculate  patch  area distribution standard	deviation 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.padsd 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.padsd input=forests	conf=movwindow7	out=forests_padsd_mov7
       r.univar	forests_padsd_mov7

       Forest map (North Carolina sample dataset) example:
       g.region	raster=landclass96 -p
       r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
       r.li.padsd input=forests	conf=movwindow7	out=forests_padsd_mov7
       # verify
       r.univar	forests_padsd_mov7
       r.to.vect input=forests output=forests type=area
       d.mon wx0
       d.rast forests_padsd_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	analy-
       sis program for quantifying landscape structure.	USDA For. Serv.	  Gen.
       Tech. Rep. PNW-351. (PDF)

AUTHORS
       Michael Shapiro - CERL (patch identification)
       Markus Metz (statistics)

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

       Accessed: Tue Sep  6 20:09:51 2022

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       index | Full index

       A(C) 2003-2022 GRASS Development	Team, GRASS GIS	8.2.0 Reference	Manual

GRASS 8.2.0							 r.li.padsd(1)

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

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