Mapped: America’s Unofficial State Borders

Travel Blog • Eva Holland • 04.27.12 | 9:59 AM ET

Pop vs. soda vs. Coke. Yankees fans vs. Red Sox fans. Over at The Atlantic Cities, Samuel Arbesman and a team of colleagues have used data from cell phone records, sports broadcast blackout zones and more to track some of the country’s informal, internal boundaries. The result is a fascinating selection of maps.