r.li.cwed(1grass) | GRASS GIS User's Manual | r.li.cwed(1grass) |
r.li.cwed - Calculates contrast weighted edge density index on a raster map
raster, landscape structure analysis, patch index
r.li.cwed
r.li.cwed --help
r.li.cwed input=name config=name
path=name output=name [--overwrite]
[--help] [--verbose] [--quiet] [--ui]
r.li.cwed (contrast weighted edge density) calculates the edge density between patch types specified:
with:
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 sample area contains only NULL values it is considered to
have 0 patch and CWED=0. If Area is 0 r.li.cwed returns -1. This is
only possible if the map is masked.
If you want to change these -1 values to NULL, run subsequently on the
resulting map:
r.null setnull=-1 input=my_mapafter index calculation.
To calculate the contrast weighted edge density 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.cwed input=my_map conf=my_conf output=my_out \
path=/path/to/weights.csv
Example for input "weights.csv" file:
12,16,0.65 44,123,0.32 56,12,0.54 23,66,0.99
r.li - package overview
g.gui.rlisetup
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)
Serena Pallecchi student of Computer Science University of Pisa
(Italy).
Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)
Markus Metz
Available at: r.li.cwed source code (history)
Accessed: Sunday Jan 22 07:36:16 2023
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