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NAMEr.li.edgedensity - Calculates edge density index on a raster map, using a 4 neighbour algorithmKEYWORDSraster, landscape structure analysis, patch indexSYNOPSISr.li.edgedensityr.li.edgedensity --help r.li.edgedensity [-b] input=name config=name output=name [patch_type=string] [--overwrite] [--help] [--verbose] [--quiet] [--ui] Flags:
Parameters:
DESCRIPTIONr.li.edgedensity calculates:
with:
The unit is meters per hectare. NOTESDo 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\GRASS7\r.li\output\ (MS-Windows) or $HOME/.grass7/r.li/output/ (GNU/Linux).If the input raster map contains only NULL values then
r.li.edgedensity consider to have 0 patches.
EXAMPLESTo calculate the 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.edgedensity input=my_map conf=my_conf output=my_outTo calculate edge density index of patch_type 34, using "my_conf" configuration file and on map "my_map", saving results in "my_out" file run: r.li.edgedensity input=my_map conf=my_conf output=my_out patch_type=34 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.edgedensity input=forests conf=movwindow7 out=forests_edgedens_mov7 r.univar forests_edgedens_mov7 Forest map (North Carolina sample dataset) example:
g.region raster=landclass96 -p r.mapcalc "forests = if(landclass96 == 5, 1, null() )" r.li.edgedensity input=forests conf=movwindow7 out=forests_edgedensity_mov7 # verify r.univar forests_edgedensity_mov7 r.to.vect input=forests output=forests type=area d.mon wx0 d.rast forests_edgedensity_mov7 d.vect forests type=boundary SEE ALSOr.li - package overviewg.gui.rlisetup REFERENCESMcGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. USDA For. Serv. Gen. Tech. Rep. PNW-351. (PDF)AUTHORSSerena Pallecchi student of Computer Science University of Pisa (Italy).Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it) Markus Metz SOURCE CODEAvailable at: r.li.edgedensity source code (history)Main index | Raster index | Topics index | Keywords index | Graphical index | Full index © 2003-2021 GRASS Development Team, GRASS GIS 7.8.6 Reference Manual
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