An embedded and charset-unspecified text was scrubbed... Name: not available URL: <https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20120801/9ec06623/attachment.pl>
measuring map similarity?
2 messages · Jason Robinson, Julian Burgos
5 days later
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 mi? 1.?g? 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 Hafranns?knastofnunin/Marine Research Institute Sk?lagata 4, 121 Reykjav?k, Iceland S?mi/Telephone : +354-5752037 Br?fs?mi/Telefax: +354-5752001 Netfang/Email: julian at hafro.is
On mi? 1.?g? 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 Hafranns?knastofnunin/Marine Research Institute Sk?lagata 4, 121 Reykjav?k, Iceland S?mi/Telephone : +354-5752037 Br?fs?mi/Telefax: +354-5752001 Netfang/Email: julian at hafro.is