Ptolemy’s Map

Ptolemy’s great merit consists in having accepted the views of Hipparchus with respect to a projection suited for a map of the world. Of the two projections proposed by him one is a modified conical projection with curved parallels and straight meridians; in the second projection (see fig. 3) both parallels and meridians are curved

Source : Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 6  "Map" to "Mars"

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