Category:Maps using Ferro prime meridian

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17° 39′ 46″ W

English: Ferro meridian (El Hiero, Canary Islands) was used since Ancient (Ptolemy's Geographia). Early 17th century set to El pico 16° 45' W (Blaeu). Later redefined 17° 39′ 46″ W of Greenwich to be exactly 20° W of Paris (-17,66277083); 1890: 17° 39' 46.02" W (-17,66278); Austria 1920s used 17° 40' 00" W (-17,66667).

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Media in category "Maps using Ferro prime meridian"

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