Rick Aschmann claims to collect dialects like other people collect stamps. I’m thinking a stamp collection on par with what he’s got going on here would be enough for everyone on Earth to send everyone else on Earth at least one piece of mail.
The more you get into this map, the more mind-boggling it is; he’s got major dialect areas, divisions, subdivisions, and transitional or anomalous areas. Explanations of how the indigenous accent mingled with migrant accents. And when you finally zone in on a spot and click, you’re taken to that area on his list, which includes audio samples with names, locations, and YouTube or audio clips to hear the dialect for yourself.