Distance between Xi'an, China and Udon Thani, Thailand
1972 km = 1225 miles
We assume a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance is calculated as great-circle or orthodromic distance between city centres on the surface of a sphere.
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Xi'an, China
Country: ChinaXi'an’s coordinates: 34°15′29″ N, 108°55′42″ E
Population: 6,501,190
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Wikipedia article: Xi'an
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Udon Thani, Thailand
Country: ThailandUdon Thani’s coordinates: 17°24′56″ N, 102°47′09″ E
Population: 247,231
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Wikipedia article: Udon Thani
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