Relatively close Capital City Pairs compared to Country Centroids: non-bordering Countries only
Let D1 be the distance between 2 capital cities of non-bordering countries. Let D2 be the distance between the 2 corresponding country centroids (the geographical centers of the countries). For which pairs of capital cities is D1/D2 smallest?
Data from Portland State University (https://www.pdx.edu/econ/country-geography-data), for missing countries from CIA (https://www.cia.gov/library/publications/the-world-factbook/fields/2011.html)
The Country of Capital A comes before the Country of Capital B in alphabetical order