DESCRIPTION
v.maxent.swd Produce a set of SWD files as input to MaxEnt 3.3.3k
(version 3.4.1 untested, but should work as well), based on a point vector
layer(s) of species distribution(s), a point layer with background points and
user-defined raster layers. The user can also let the function create the
background point file. (respecting region and mask, if set).
The SWD file format is a simple CSV-like file file format as
described in Elith et al. 2011. The first three fields provide the
species name, x-coordinate and y-coordinate, while subsequent fields
contain the values of the user-selected environmental parameters.
Note that the coordinates are not used by the MaxEnt program if all
environmental data is given in the SWD format file.
The user can provide one or more species point files, which will be
combined in one SWD file. The map names of both the species point
layers and the environmental parameters can be replaced by alias
names, which will be used by MaxEnt.
NOTES
The SWD output files are simple comma delimited text
files (.csv) and can therefore be easily read in in for example R
and subsequently used in other models / functions.
SEE ALSO
REFERENCES
- Steven J. Phillips, Miroslav Dudík, Robert E. Schapire.A maximum
entropy approach to species distribution modeling. In Proceedings of the
Twenty-First International Conference on Machine Learning, pages 655-662,
2004.
- Steven J. Phillips, Robert P. Anderson, Robert E. Schapire. Maximum
entropy modeling of species geographic distributions. Ecological Modelling,
190:231-259, 2006.
- Jane Elith, Steven J. Phillips, Trevor Hastie, Miroslav Dudík, Yung En
Chee, Colin J. Yates. A statistical explanation of MaxEnt for ecologists.
Diversity and Distributions, 17:43-57, 2011.
AUTHOR
Paulo van Breugel, paulo at ecodiv.earth
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