Hi Jason,
One option is simply to rasterize the polygons (using the package
"raster"). If your polygons have complex shapes, be sure to use a high
resolution in the rasters. Then you can compare them using the Syrjala
(1996) test. There is a function to perform it on the "ecespa" package.
Julian
On mið 1.ágú 2012 13:39, Jason Robinson wrote:
Hoping someone might be able to steer me in the right direction, not sure
where to look
I have several different modeling methods to predict patterns of species
occurrences over the same geographic area. I'd like to compare the shape
and position of the predicted areas between maps, in reference to a "true
distribution" map. Since I have irregular polygons instead of raster cells
this gets a little hairy for me to think about coding.
I thought that epidemiologists might have some experience with this
problem.
[[alternative HTML version deleted]]
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--
Julian Mariano Burgos, PhD
Hafrannsóknastofnunin/Marine Research Institute
Skúlagata 4, 121 Reykjavík, Iceland
Sími/Telephone : +354-5752037
Bréfsími/Telefax: +354-5752001
Netfang/Email: [email protected]
On mið 1.ágú 2012 13:39, Jason Robinson wrote:
Hoping someone might be able to steer me in the right direction, not sure
where to look
I have several different modeling methods to predict patterns of species
occurrences over the same geographic area. I'd like to compare the shape
and position of the predicted areas between maps, in reference to a "true
distribution" map. Since I have irregular polygons instead of raster cells
this gets a little hairy for me to think about coding.
I thought that epidemiologists might have some experience with this
problem.
[[alternative HTML version deleted]]
_______________________________________________
R-sig-Geo mailing list
[email protected]
https://stat.ethz.ch/mailman/listinfo/r-sig-geo
--
Julian Mariano Burgos, PhD
Hafrannsóknastofnunin/Marine Research Institute
Skúlagata 4, 121 Reykjavík, Iceland
Sími/Telephone : +354-5752037
Bréfsími/Telefax: +354-5752001
Netfang/Email: [email protected]
_______________________________________________
R-sig-Geo mailing list
[email protected]
https://stat.ethz.ch/mailman/listinfo/r-sig-geo
