1r.li.shape(1) GRASS GIS User's Manual r.li.shape(1)
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6 r.li.shape - Calculates shape index on a raster map
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9 raster, landscape structure analysis, patch index
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12 r.li.shape
13 r.li.shape --help
14 r.li.shape input=name config=name output=name [--overwrite] [--help]
15 [--verbose] [--quiet] [--ui]
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17 Flags:
18 --overwrite
19 Allow output files to overwrite existing files
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21 --help
22 Print usage summary
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24 --verbose
25 Verbose module output
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27 --quiet
28 Quiet module output
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30 --ui
31 Force launching GUI dialog
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33 Parameters:
34 input=name [required]
35 Name of input raster map
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37 config=name [required]
38 Configuration file
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40 output=name [required]
41 Name for output raster map
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44 r.li.shape calculates the landscape shape index as:
45 LSI = 0.25 * E / sqrt(A)
46 with:
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48 • E: sum of all edges
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50 • A: sum of all patch areas
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53 Do not use absolute path names for the config and output file/map pa‐
54 rameters. If the "moving window" method was selected in
55 g.gui.rlisetup, then the output will be a raster map, otherwise an
56 ASCII file will be generated in the folder C:\Users\userxy\App‐
57 Data\Roaming\GRASS8\r.li\output\ (MS-Windows) or
58 $HOME/.grass8/r.li/output/ (GNU/Linux).
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60 If the input raster map contains only NULL values then r.li.shape re‐
61 turns NULL.
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64 To calculate the shape index on map my_map, using my_conf configuration
65 file (previously defined with g.gui.rlisetup) and saving results in
66 my_out, run:
67 r.li.shape input=my_map conf=my_conf output=my_out
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69 Forest map (Spearfish sample dataset) example:
70 g.region raster=landcover.30m -p
71 r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
72 r.li.shape input=forests conf=movwindow7 out=forests_shape_mov7
73 r.univar forests_shape_mov7
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75 Forest map (North Carolina sample dataset) example:
76 g.region raster=landclass96 -p
77 r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
78 r.li.shape input=forests conf=movwindow7 out=forests_shape_mov7
79 # verify
80 r.univar forests_shape_mov7
81 r.to.vect input=forests output=forests type=area
82 d.mon wx0
83 d.rast forests_shape_mov7
84 d.vect forests type=boundary
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87 r.li - package overview
88 g.gui.rlisetup
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91 McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analy‐
92 sis program for quantifying landscape structure. USDA For. Serv. Gen.
93 Tech. Rep. PNW-351. (PDF)
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96 Claudio Porta and Lucio Davide Spano, students of Computer Science Uni‐
97 versity of Pisa (Italy).
98 Commission from Faunalia Pontedera (PI) (www.faunalia.it)
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101 Available at: r.li.shape source code (history)
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103 Accessed: Mon Jun 20 16:46:22 2022
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105 Main index | Raster index | Topics index | Keywords index | Graphical
106 index | Full index
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108 © 2003-2022 GRASS Development Team, GRASS GIS 8.2.0 Reference Manual
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112GRASS 8.2.0 r.li.shape(1)