1r.li.padsd(1)                 Grass User's Manual                r.li.padsd(1)
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NAME

6       r.li.padsd  - Calculates standard deviation of patch area a raster map
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KEYWORDS

9       raster, landscape structure analysis, patch index
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SYNOPSIS

12       r.li.padsd
13       r.li.padsd --help
14       r.li.padsd  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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DESCRIPTION

44       r.li.padsd calculates the standard deviation of  patch  area  sizes  in
45       hectares as:
46       with:
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48           ·   MPS: mean patch area size
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50           ·   ai: area of patch i
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52           ·   Npatch: number of patches
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54       This  index is calculated using a 4 neighbour algorithm, diagonal cells
55       are ignored when tracing a patch.
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NOTES

58       Do not use absolute path names  for  the  config  and  output  file/map
59       parameters.    If   the   "moving   window"   method  was  selected  in
60       g.gui.rlisetup, then the output will be  a  raster  map,  otherwise  an
61       ASCII  file  will  be  generated  in  the  folder  C:\Users\userxy\App‐
62       Data\Roaming\GRASS7\r.li\output\            (MS-Windows)             or
63       $HOME/.grass7/r.li/output/ (GNU/Linux).
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65       The result is NULL if the sample area contains only NULL values.
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EXAMPLES

68       To  calculate  patch  area distribution standard deviation index on map
69       my_map, using  my_conf  configuration  file  (previously  defined  with
70       g.gui.rlisetup) and saving results in my_out, run:
71       r.li.padsd input=my_map conf=my_conf output=my_out
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73       Forest map (Spearfish sample dataset) example:
74       g.region raster=landcover.30m -p
75       r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
76       r.li.padsd input=forests conf=movwindow7 out=forests_padsd_mov7
77       r.univar forests_padsd_mov7
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79       Forest map (North Carolina sample dataset) example:
80       g.region raster=landclass96 -p
81       r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
82       r.li.padsd input=forests conf=movwindow7 out=forests_padsd_mov7
83       # verify
84       r.univar forests_padsd_mov7
85       r.to.vect input=forests output=forests type=area
86       d.mon wx0
87       d.rast forests_padsd_mov7
88       d.vect forests type=boundary
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SEE ALSO

91        r.li - package overview
92       g.gui.rlisetup
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REFERENCES

95       McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analy‐
96       sis program for quantifying landscape structure. USDA For. Serv.   Gen.
97       Tech. Rep. PNW-351. (PDF)
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AUTHORS

100       Michael Shapiro - CERL (patch identification)
101       Markus Metz (statistics)
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SOURCE CODE

104       Available at: r.li.padsd source code (history)
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106       Main  index  | Raster index | Topics index | Keywords index | Graphical
107       index | Full index
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109       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual
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113GRASS 7.8.2                                                      r.li.padsd(1)
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