NAME¶

r.li.pielou - Calculates Pielou's diversity index on a raster map

KEYWORDS¶

raster, landscape structure analysis, diversity index

SYNOPSIS¶

r.li.pielou r.li.pielou help r.li.pielou map=name conf=string output=name [-- overwrite] [--verbose] [--quiet]

Flags:¶

--overwrite

 

Allow output files to overwrite existing files

--verbose

 

Verbose module output

--quiet

 

Quiet module output

Parameters:¶

map=name

 

Name of input raster map

conf=string

 

Configuration file

output=name

 

Name for output raster map

DESCRIPTION¶

r.li.pielou calculates the "pielou's diversity index" as: with:

NOTES¶

Do not use absolute path names for output files. They are raster if moving window disposition was selected, otherwise they are in ~/.r.li/output/ folder. If the input raster contains NULL value cells, r.li.pielou returns -1 for these cells. If you want to keep NULL values instead, run subsequently on the resulting map: r.null setnull=-1 map=my_map

EXAMPLES¶

To calculate Pielou's diversity index on the map "my_map", using the previously created "my_conf" configuration file ( r.li.setup) and saving results in "my_out" raster map, run: r.li.pielou map=my_map conf=my_conf output=my_out

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)

SEE ALSO¶

r.li, r.li.setup

AUTHORS¶

Luca Delucchi and Duccio Rocchini, Fondazione E. Mach (Italy), based on the r.li.shannon code developed by Serena Pallecchi student of Computer Science University of Pisa (Italy). Last changed: $Date: 2010-11-24 17:49:21 +0100 (Wed, 24 Nov 2010) $ Full index © 2003-2011 GRASS Development Team