NAME

r.le.patch - This program can be used to calculate attribute, patch size, core (interior) size, shape, fractal dimension, and perimeter measures for sets of patches in a landscape
(GRASS Raster Program)

GRASS VERSION

4.x

SYNOPSIS

r.le.patch
r.le.patch help
r.le.patch [-bcnptu] map=name [sam=name] [reg=name] [att=name[,name,...]] [siz=name[,name,...]] [co1=value] [co2=name[,name,...]] [sh1=name] [sh2=name[,name,...]] [fra=name] [per=name[,name,...]] [out=name]

OPTIONS

Flags:

-b
Run in background.
-c
Output map 'interior' with patch cores.
-n
Output map 'num' with patch numbers.
-p
Include sampling area boundary as perimeter.
-t
Use 4 neighbor tracing instead of 8 neighbor.
-u
Output maps 'units_x' with sampling units for each scale x.

Parameters:

map
Raster map to be analyzed.
sam
Sampling method (choose only 1 method): w=whole map, u=units, m=moving window, r=regions
Default: w
reg
Name of regions map, only when sam = r; omit otherwise.
att
Attribute measures:
Options: a1, a2, a3, a4, a5, a6, a7
a1 = mean pixel attribute
a2 = st. dev. pixel attribute
a3 = mean patch attribute
a4 = st. dev. patch attribute
a5 = cover by gp
a6 = density by gp
a7 = total density
siz
Patch size measures:
Options: s1, s2, s3, s4, s5, s6
s1 = mean patch size
s2 = st. dev. patch size
s3 = mean patch size by gp
s4 = st. dev. patch size by gp
s5 = no. by size class
s6 = no. by size class by gp
co1
Edge width in pixels (integer) for use with co2
co2
Core size measures (required if co1 was specified):
Options: c1, c2, c3, c4, c5, c6, c7, c8, c9, c10
c1 = mean core size
c2 = st. dev. core size
c3 = mean edge size
c4 = st. dev. edge size
c5 = mean core size by gp
c6 = st. dev. core size by gp
c7 = mean edge size by gp
c8 = st. dev. edge size by gp
c9 = no. by size class
c10 = no. by size class by gp
sh1
Shape method (choose only 1 method):
m1 = perim./area
m2 = corr. perim./area
m3 = rel. circum. circle
sh2
Shape measures (required if sh1 was specified):
Options: h1, h2, h3, h4, h5, h6
h1 = mean patch shape
h2 = st. dev. patch shape
h3 = mean patch shape by gp
h4 = st. dev. patch shape by gp
h5 = no. by shape class
h6 = no. by shape class by gp
fra
Fractal dimension measures:
Options: f1
f1 = perim.-area fractal dim.
per
Perimeter measures (required if pe1 was specified):
Options: p1, p2, p3, p4, p5, p6
p1 = sum of perims.
p2 = mean perim.
p3 = st. dev. perim.
p4 = sum of perims. by gp
p5 = mean perim. by gp
p6 = st. dev. perim. by gp
out
Name of output file for individual patch measures, when sam=w, u, r; if out=head, then column headings will be printed

SEE ALSO

The r.le Programs Users Guide
r.le.dist, r.le.null, r.le.pixel, r.le.rename, r.le.setup, r.le.trace

AUTHOR

William L. Baker, Department of Geography and Recreation, University of Wyoming