1r.li.mps(1) Grass User's Manual r.li.mps(1)
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6 r.li.mps - Calculates mean patch size index on a raster map, using a 4
7 neighbour algorithm
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10 raster, landscape structure analysis, patch index
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13 r.li.mps
14 r.li.mps --help
15 r.li.mps input=name config=name output=name [--overwrite] [--help]
16 [--verbose] [--quiet] [--ui]
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18 Flags:
19 --overwrite
20 Allow output files to overwrite existing files
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22 --help
23 Print usage summary
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25 --verbose
26 Verbose module output
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28 --quiet
29 Quiet module output
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31 --ui
32 Force launching GUI dialog
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34 Parameters:
35 input=name [required]
36 Name of input raster map
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38 config=name [required]
39 Configuration file
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41 output=name [required]
42 Name for output raster map
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45 r.li.mps (mean patch size) calculates the mean size of the patches in
46 the sampling area as:
47 MPS = A / Npatch
48 with:
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50 · A:sampling area size without null cells
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52 · Npatch: number of patches
53 The unit of the mean size is hectare.
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55 This index is calculated using a 4 neighbour algorithm, diagonal cells
56 are ignored when tracing a patch.
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59 Do not use absolute path names for the config and output file/map
60 parameters. If the "moving window" method was selected in
61 g.gui.rlisetup, then the output will be a raster map, otherwise an
62 ASCII file will be generated in the folder C:\Users\userxy\App‐
63 Data\Roaming\GRASS7\r.li\output\ (MS-Windows) or
64 $HOME/.grass7/r.li/output/ (GNU/Linux).
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66 If the sample area contains only NULL value cells, r.li.mps returns 0
67 (zero).
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70 To calculate mean path size index on map my_map, using my_conf configu‐
71 ration file (previously defined with g.gui.rlisetup) and saving results
72 in my_out, run:
73 r.li.mps input=my_map conf=my_conf output=my_out
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75 Forest map (Spearfish sample dataset) example:
76 g.region raster=landcover.30m -p
77 r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
78 r.li.mps input=forests conf=movwindow7 out=forests_mps_mov7
79 r.univar forests_mps_mov7
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81 Forest map (North Carolina sample dataset) example:
82 g.region raster=landclass96 -p
83 r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
84 r.li.mps input=forests conf=movwindow7 out=forests_mps_mov7
85 # verify
86 r.univar forests_mps_mov7
87 r.to.vect input=forests output=forests type=area
88 d.mon wx0
89 d.rast forests_mps_mov7
90 d.vect forests type=boundary
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93 r.li - package overview
94 g.gui.rlisetup
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97 McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analy‐
98 sis program for quantifying landscape structure. USDA For. Serv. Gen.
99 Tech. Rep. PNW-351. (PDF)
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102 Michael Shapiro - CERL (patch identification)
103 Markus Metz (statistics)
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106 Available at: r.li.mps source code (history)
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108 Main index | Raster index | Topics index | Keywords index | Graphical
109 index | Full index
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111 © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual
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115GRASS 7.8.2 r.li.mps(1)