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| | Talk:Great circle - Wikipedia, the free encyclopedia |
 | | The title of his work literally means ‘Corrections in the map of the world' or ‘Corrections in the map of the inhabited world', which goes to show that Marinus of Tyre wanted to improve and revise one or several works of earlier mapmakers. |
 | | While Strabo, who lived between 58 BC and 24 AD, kept Eratosthenes' measurements of 252 thousand stadia for the circumference of the Earth, that is 700 stadia per degree, Marino uses Posidonius's calculations of 180 thousand stadia, with a degree of 500 stadia (Antonio Ballesteros Beretta: Génesis del descubrimiento, vol 3, Barcelona, Salvat 1947). |
 | | A stadium is an old Greek measurement of length, the equivalent of 600 old Greek feet (192.27m) or 125 paces, which was the exact distance separating the columns in the great amphitheatre of Olympia. |
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