The minimum-distance database records the minimum distances for all polities in the Gleditsch-Ward country list.
The minimum-distance database records the minimum distances for all polities in the Gleditsch-Ward country list, within 950 km of each other.
This is calculated as the shortest distance in statute kilometers between points on the outer boundaries for two polities, regardless of whether the states are separated by land or sea, given the borders in place in a particular time period.
Gleditsch, Kristian S., and Michael D. Ward. 2001. "Measuring Space: A Minimum Distance Database." Journal of Peace Research 38:749-68
Updated: 14 Dec 2004
Range: 1875 - 2002
Units: Active, but no plans