DESCRIPTION
r.diversity calculates selected diversity indices by
calling various r.li commands.
This script uses the Pielou, Renyi, Shannon and Simpson indices. The
output is a map for each index.
NOTES
The user does not need to create a "conf" file with r.li.setup
because this file will be created automatically by the script.
In size option it is possible use more values: the user can set more
values with comma (,) and a range with minus (-).
If you calculate Renyi entropy remember to add the alpha option.
Alpha option support single and multi values but not a range.
If the input raster contains NULL value cells, r.diversity
returns -1 for these cells.
If the user wants to keep NULL values instead, run subsequently on the
resulting map:
r.null map=my_map setnull=-1
EXAMPLES
To calculate the set of indices from a NDVI map, with a moving window
of 3 x 3 pixel, run:
r.diversity input=ndvi_map prefix=diversity alpha=0.5
To calculate the set of indices from a NDVI map, with a moving window
of 7 x 7 pixel, run:
r.diversity input=ndvi_map prefix=diversity alpha=0.5 size=7
To calculate only Pielou and Simpson indices from a NDVI map, with
several moving window (3 x 3, 5 x 5, 7 x 7, 9 x 9), run:
r.diversity input=ndvi_map prefix=diversity size=3-9 method=pielou,simpson
To calculate all methods excluding Pielou from a NDVI map, with two moving
window (3 x 3, 9 x 9), run:
r.diversity input=ndvi_map prefix=diversity size=3,9 exclude=pielou alpha=3
SEE ALSO
r.li,
r.li.pielou,
r.li.renyi,
r.li.shannon,
r.li.simpson
AUTHOR
Luca Delucchi and Duccio Rocchini, Fondazione E. Mach (Italy)
Last changed: $Date$