Tukuk-OS🌏 Antipodes
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Antipodes. Drop a line from a place straight through the centre of the planet and note where it comes out: that is its antipode. The rule is two lines of arithmetic — keep the size of the latitude and change its hemisphere, then add 180° of longitude and fold anything past the dateline back into range. The surface distance between the pair is always half a great circle, about 20,015 km, and the line through the Earth is its mean diameter, about 12,742 km.
🌏Antipode of CairoFlip Cairo through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of AlexandriaFlip Alexandria through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of LagosFlip Lagos through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of AbujaFlip Abuja through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of NairobiFlip Nairobi through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of MombasaFlip Mombasa through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Addis AbabaFlip Addis Ababa through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of CasablancaFlip Casablanca through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of MarrakeshFlip Marrakesh through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of AlgiersFlip Algiers through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of TunisFlip Tunis through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Cape TownFlip Cape Town through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of JohannesburgFlip Johannesburg through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of DurbanFlip Durban through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Dar es SalaamFlip Dar es Salaam through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of KampalaFlip Kampala through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of KigaliFlip Kigali through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of AccraFlip Accra through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of DakarFlip Dakar through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of LuandaFlip Luanda through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of MaputoFlip Maputo through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of AntananarivoFlip Antananarivo through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Port LouisFlip Port Louis through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of New York CityFlip New York City through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Los AngelesFlip Los Angeles through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of ChicagoFlip Chicago through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of San FranciscoFlip San Francisco through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Washington, D.C.Flip Washington, D.C. through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of BostonFlip Boston through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of MiamiFlip Miami through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of SeattleFlip Seattle through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of New OrleansFlip New Orleans through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Las VegasFlip Las Vegas through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of TorontoFlip Toronto through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of MontrealFlip Montreal through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of VancouverFlip Vancouver through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Mexico CityFlip Mexico City through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of GuadalajaraFlip Guadalajara through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of CancúnFlip Cancún through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of HavanaFlip Havana through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of KingstonFlip Kingston through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of San JoséFlip San José through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Panama CityFlip Panama City through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of BogotáFlip Bogotá through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of MedellínFlip Medellín through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of LimaFlip Lima through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of CuscoFlip Cusco through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Rio de JaneiroFlip Rio de Janeiro through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of São PauloFlip São Paulo through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of BrasíliaFlip Brasília through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of Buenos AiresFlip Buenos Aires through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of SantiagoFlip Santiago through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of MontevideoFlip Montevideo through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of CaracasFlip Caracas through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of QuitoFlip Quito through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of La PazFlip La Paz through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of TokyoFlip Tokyo through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of KyotoFlip Kyoto through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of OsakaFlip Osaka through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
🌏Antipode of SeoulFlip Seoul through the centre of the Earth: its exact antipodal point, what is nearest to it, and the maths to do any pair.
How these tools work
Because roughly 86 per cent of the surface is ocean and land is concentrated in the northern hemisphere, the other side of most places is water, which is what makes the land-on-land pairs interesting. Each page therefore names the nearest place in our coordinate table to that antipode and states the distance — a useful, honest bound rather than a claim about every village on Earth. The form accepts any position, so a hill you once stood on works as well as a capital.
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