r.li.padcv(1grass)

1r.li.padcv(1)                 Grass User's Manual                r.li.padcv(1)
2
3
4

NAME

6       r.li.padcv   -  Calculates  coefficient of variation of patch area on a
7       raster map
8

KEYWORDS

10       raster, landscape structure analysis, patch index
11

SYNOPSIS

13       r.li.padcv
14       r.li.padcv --help
15       r.li.padcv input=name config=name output=name  [--overwrite]   [--help]
16       [--verbose]  [--quiet]  [--ui]
17
18   Flags:
19       --overwrite
20           Allow output files to overwrite existing files
21
22       --help
23           Print usage summary
24
25       --verbose
26           Verbose module output
27
28       --quiet
29           Quiet module output
30
31       --ui
32           Force launching GUI dialog
33
34   Parameters:
35       input=name [required]
36           Name of input raster map
37
38       config=name [required]
39           Configuration file
40
41       output=name [required]
42           Name for output raster map
43

DESCRIPTION

45       r.li.padcv  calculates the coefficient of variation of patch area sizes
46       in hectares as:
47       with:
48
49           ·   SD: standard deviation of patch area size
50
51           ·   MPS: mean patch area size
52
53           ·   ai: area of patch i
54
55           ·   Npatch: number of patches
56

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).
64
65       The result is NULL if the sample area contains only NULL values.
66

EXAMPLES

68       To  calculate patch area distribution coefficient of variation index on
69       map my_map, using my_conf configuration file (previously  defined  with
70       g.gui.rlisetup) and saving results in my_out, run:
71       r.li.padcv input=my_map conf=my_conf output=my_out
72
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.padcv input=forests conf=movwindow7 out=forests_padcv_mov7
77       r.univar forests_padcv_mov7
78
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.padcv input=forests conf=movwindow7 out=forests_padcv_mov7
83       # verify
84       r.univar forests_padcv_mov7
85       r.to.vect input=forests output=forests type=area
86       d.mon wx0
87       d.rast forests_padcv_mov7
88       d.vect forests type=boundary
89

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)
98

AUTHORS

100       Michael Shapiro - CERL (patch identification)
101       Markus Metz (statistics)
102
103       Last changed: $Date: 2014-12-19 22:17:36 +0100 (Fri, 19 Dec 2014) $
104

SOURCE CODE

106       Available at: r.li.padcv source code (history)
107
108       Main  index  | Raster index | Topics index | Keywords index | Graphical
109       index | Full index
110
111       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.0 Reference Manual
112
113
114
115GRASS 7.6.0                                                      r.li.padcv(1)