City Distance Database - Place Distance Database

City Distances are great-circle distances calculated using the Haversine formula based on internal points in the geographic area.

Places are from Census 2000 SF1 and Census 2010 SF1 files. Places "usually [are] a city, town, village, or borough, but can have other legal descriptions."

The size of the file increases with the radius. Smaller files (<= 25 or <= 50 miles) may be easier to use if only distances <= 25 or <= 50 miles respectively are needed. The ∞ has all combinations of counties.

Updates and changes.

Contact Jean Roth jroth@nber.org with questions, comments, or suggestions.