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r.li.dominance(1grass) GRASS GIS User's Manual r.li.dominance(1grass)

NAME

r.li.dominance - Calculates dominance’s diversity index on a raster map

KEYWORDS

raster, landscape structure analysis, diversity index

SYNOPSIS

r.li.dominance
r.li.dominance --help
r.li.dominance input=name config=name output=name [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:


Allow output files to overwrite existing files

Print usage summary

Verbose module output

Quiet module output

Force launching GUI dialog

Parameters:


Name of input raster map

Configuration file

Name for output raster map

DESCRIPTION

r.li.dominance calculates the "dominance diversity index" as:
with:

  • i: patch type
  • m: number of different patch types
  • pi: proportional abundance of patch type i

NOTES

Do not use absolute path names for the config and output file/map parameters. If the "moving window" method was selected in g.gui.rlisetup, then the output will be a raster map, otherwise an ASCII file will be generated in the folder C:\Users\userxy\AppData\Roaming\GRASS8\r.li\output\ (MS-Windows) or $HOME/.grass8/r.li/output/ (GNU/Linux).

If the input raster map contains only NULL values then r.li.dominance returns NULL.

EXAMPLES

To calculate the dominance diversity index on map my_map, using my_conf configuration file (previously defined with g.gui.rlisetup) and saving results in my_out, run: 

r.li.dominance input=my_map conf=my_conf output=my_out

Forest map (Spearfish sample dataset) example: 

g.region raster=landcover.30m -p
r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
r.li.dominance input=forests conf=movwindow7 out=forests_dominance_mov7
r.univar forests_dominance_mov7

Forest map (North Carolina sample dataset) example: 

g.region raster=landclass96 -p
r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
r.li.dominance input=forests conf=movwindow7 out=forests_dominance_mov7
# verify
r.univar forests_dominance_mov7
r.to.vect input=forests output=forests type=area
d.mon wx0
d.rast forests_dominance_mov7
d.vect forests type=boundary

SEE ALSO

r.li - package overview
g.gui.rlisetup

REFERENCES

McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. USDA For. Serv. Gen. Tech. Rep. PNW-351. (PDF)

AUTHORS

Serena Pallecchi student of Computer Science University of Pisa (Italy).
Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)
Markus Metz

SOURCE CODE

Available at: r.li.dominance source code (history)

Accessed: Sunday Jan 22 07:36:17 2023

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© 2003-2023 GRASS Development Team, GRASS GIS 8.2.1 Reference Manual

GRASS 8.2.1