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.

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