r.le.patch(1)

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.null, 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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