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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] [--help] [--verbose] [--quiet] [--ui]

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
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters:

map=string [required]
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

Table of contents

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.

SOURCE CODE

Available at: r.le.patch source code (history)


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