Distance between Surabaya, Indonesia and Napa, California, USA
13539 km = 8413 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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Surabaya, Indonesia
Country: IndonesiaSurabaya’s coordinates: 7°14′57″ S, 112°45′02″ E
Population: 2,374,658
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Wikipedia article: Surabaya
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Napa, USA
Country: USAState: California
Napa’s coordinates: 38°17′49″ N, 122°17′07″ W
Population: 76,915
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Wikipedia article: Napa
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