Westernmost and Easternmost Major Cities of Countries on the World Map
For each country consider cities whose population is at least 5% of the country's largest city. Exclude those having a larger city within 50 km. For each country choose the westernmost and the easternmost. Exclude those with less than 100,000 inhabitants. Good luck finding them all!
Red dots indicate westernmost, blue dots indicate easternmost, purple dots indicate those that are both westernmost and easternmost