The Ptolemy world map is a map of the known world to Hellenistic society in the 2nd century AD. It was based on the description contained in Ptolemy's book Geographia, written 150 AD. The most significant contribution of Ptolemy and his maps is the first use of longitudinal and latitudinal lines and the specifying of terrestrial locations by celestial observations. The map also includes the twelve winds designated by Aristotle.
June 6th, 2014
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