It's an interesting visual, but even he's not sure what the map tells us, except that Bigfoot seems to be "thriving out west."
It reminds me of a similar map that showed the "distribution of drop bears in Australia" that appeared in a Dec 2012 article in Australian Geographer.
Is there a map of Elvis sightings? There is an Elvis Sighting Society, but no map that I'm aware of. Though in a post back in 2006 I noted that "LaMa has been lobbying for quite some time to add an Elvis Sighting Report Page, interfaced with a Google earth map, to the Museum of Hoaxes." We need to get on that project before Elvis gets too old and stops being seen. He's 78 this year!