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