[R-sig-Geo] measuring map similarity?

[Julian Burgos]

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]]
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at r-project.org
> 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: julian at hafro.is



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
> R-sig-Geo at r-project.org
> 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: julian at hafro.is