Provided by: grass-doc_6.4.3-3_all
r.le.patch - Calculates attribute, patch size, core (interior) size, shape, fractal dimension, and perimeter measures for sets of patches in a landscape.
raster, landscape structure analysis, patch index
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
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.
Full instructions can be found in the r.le manual (see "REFERENCES" section below) and the r.le.setup help page.
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)
r.le.pixel, r.le.setup, r.le.trace
William L. Baker Department of Geography and Recreation University of Wyoming Laramie, Wyoming 82071 U.S.A. Last changed: $Date: 2009-02-03 18:00:13 -0800 (Tue, 03 Feb 2009) $ Full index © 2003-2013 GRASS Development Team