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, landscape structure analysis, patch index
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]
[--
verbose] [--
quiet]
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
- --verbose
-
Verbose module output
- --quiet
-
Quiet module output
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: 2009-02-04 03:03:33 +0100 (Wed, 04 Feb 2009) $
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