What does this tapestry show us? Burger King has a decently uniform presence across the country, as does Micky D's, still the dark overlord of fast food across the country. Sonic shines bright in Texas and some of the adjacent states--it's the only large swath of land where one of the insurgent chains has an overwhelming influence. And Dairy Queen makes a surprisingly strong showing in Minnesota and the Dakotas.
No In-N-Out on the list, but it seems unlikely the chain would much of a blip.