| Land Boudaries Total Saint Helena :
| .
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| Geographic Coordinates Saint Helena :
| Saint Helena - tropical; marine; mild, tempered by trade winds; Tristan da Cunha - temperate; marine, mild, tempered by trade winds (tends to be cooler than Saint Helena) .
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| Area Total Saint Helena :
| 410 sq km .
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| Area Land Saint Helena :
| 410 sq km .
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| Area Water Saint Helena :
| 0 sq km .
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| Area Comparative Saint Helena :
| slightly more than twice the size of Washington, DC .
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| Coast Line Saint Helena :
| 60 km .
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| Railways Total Saint Helena :
| 198 km (Saint Helena 138 km, Ascension 40 km, Tristan da Cunha 20 km) .
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| Highways Total Saint Helena :
| 198 km (Saint Helena 138 km, Ascension 40 km, Tristan da Cunha 20 km) .
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| Waterways Saint Helena :
| .
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| Ports and Harbors Saint Helena :
| Georgetown (on Ascension), Jamestown .
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