r.le.patch

## NAME

r.le.patch - Calculates attribute, patch size, core (interior) size, shape, fractal dimension, and perimeter measures for sets of patches in a landscape.

## KEYWORDS

raster

## SYNOPSIS

r.le.patch
r.le.patch help
r.le.patch [-cnptu] map=string [sam=string] [reg=string] [att=string[,string,...]] [siz=string[,string,...]] [co1=integer] [co2=string[,string,...]] [sh1=string] [sh2=string[,string,...]] [bnd=string[,string,...]] [per=string[,string,...]] [out=string]

### Flags:

-c
  Output map 'interior' with patch cores (specify co1 & co2)
-n
  Output map 'num' with patch numbers
-p
  Include sampling area boundary as perimeter
-t
  Use 4 neighbor instead of 8 neighbor tracing
-u
  Output maps 'units_x' with sampling units for each scale x

### Parameters:

map=string
  Raster map to be analyzed
sam=string
  Sampling method (choose only 1 method):
  w = whole map u = units m = moving window r = regions
  Default: w
reg=string
  Name of regions map, only when sam = r; omit otherwise
att=string[,string,...]
  a1 = mn. pixel att. a2 = s.d. pixel att.
  a3 = mn. patch att. a4 = s.d. patch att.
  a5 = cover by gp a6 = density by gp
  a7 = total density a8 = eff. mesh number
  Options: a1,a2,a3,a4,a5,a6,a7,a8
siz=string[,string,...]
  s1 = mn. patch size s2 = s.d. patch size
  s3 = mn. patch size by gp s4 = s.d. patch size by gp
  s5 = no. by size class s6 = no. by size class by gp
  s7 = eff. mesh size s8 = deg. landsc. division
  Options: s1,s2,s3,s4,s5,s6,s7,s8
co1=integer
  Depth-of-edge-influence in pixels (integer) for use with co2
co2=string[,string,...]
  Core size measures (required if co1 was specified):
  c1 = mn. core size c2 = s.d. core size
  c3 = mn. edge size c4 = s.d. edge size
  c5 = mn. core size by gp c6 = s.d. core size by gp
  c7 = mn. edge size by gp c8 = s.d. edge size by gp
  c9 = no. by size class c10 = no. by size class by gp
  Options: c1,c2,c3,c4,c5,c6,c7,c8,c9,c10
sh1=string
  Shape index (choose only 1 index):
  m1 = per./area m2 = corr. per./area m3 = rel. circum. circle
sh2=string[,string,...]
  Shape measures (required if sh1 was specified):
  h1 = mn. patch shape h2 = s.d. patch shape
  h3 = mn. patch shape by gp h4 = s.d. patch shape by gp
  h5 = no. by shape class h6 = no. by shape class by gp
  Options: h1,h2,h3,h4,h5,h6
bnd=string[,string,...]
  n1 = mn. twist number n2 = s.d. twist number
  n3 = mn. omega index n4 = s.d. omega index
  Options: n1,n2,n3,n4
per=string[,string,...]
  p1 = sum of perims. p4 = sum of perims. by gp
  p2 = mn. per. p5 = mn. per. by gp
  p3 = s.d. per. p6 = s.d. per. by gp
  Options: p1,p2,p3,p4,p5,p6
out=string
  Name of output file for individual patch measures, when sam=w,u,r;
  if out=head, then column headings will be printed

## DESCRIPTION

The r.le.patch module calculates attribute, patch size, core (interior) size, shape, fractal dimension, and perimeter measures for sets of patches in a landscape.

## NOTES

Full instructions can be found in the r.le manual (see "REFERENCES" section below) and the r.le.setup help page.

## REFERENCES

Baker, W.L. and Y. Cai. 1992. The r.le programs for multiscale analysis of landscape structure using the GRASS geographical information system. Landscape Ecology 7(4):291-302.

The r.le manual: Quantitative analysis of landscape structures (GRASS 5; 2001)

## SEE ALSO

r.le.pixel, r.le.setup, r.le.trace

## AUTHOR

William L. Baker Department of Geography and Recreation University of Wyoming Laramie, Wyoming 82071 U.S.A.

Last changed: $Date: 2006/10/06 03:35:41 $

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