This file capdist.csv contains the great circle distance between capital cities in the kilometers for all states in the file latlong.csv, which contains the latitude and longitude of the capital cities.

As a courtesy to people who have somehow failed to realize that the metric system is 10 times better the file also contains distances in miles. (The imperial system is currently used in only three countries, the USA, Myanmar, and Liberia.)

The capdist.csv data can be generated from latlong.csv with the perl program capdist.pl