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Guide to Geography

work by Ptolemy
Also known as: “Geographike hyphegesis”

Quick Summary

Ptolemy's Guide to Geography was a seminal work that provided the methods and information needed to map the known world during his time. He recorded the longitudes and latitudes of approximately 8,000 locations, creating a detailed image of the inhabited world within the Roman Empire. This work, though containing distortions due to inaccurate descriptions of trade routes, significantly influenced cartography in the Byzantine and Renaissance periods. Ptolemy also developed map projections to represent the Earth's spherical surface on a flat map, anticipating later cartographic techniques.12

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2 Britannica Sources
  1. Ptolemy
  2. Ptolemy: Top Questions

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