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The Ptolemy world map is a map of the world known to Greco-Roman societies in the 2nd century. It is based on the description contained in Ptolemy 's book Geography , written c. 150 . Based on an inscription in several of the earliest surviving manuscripts, it is traditionally credited to Agathodaemon of Alexandria .
The coloured map of al-Maʾmūm constructed by a team including al-Khwārazmī was described by the Persian encyclopædist al-Masʿūdī around 956 as superior to the maps of Marinus and Ptolemy, [41] probably indicating that it was built along similar mathematical principles. [42] It included 4530 cities and over 200 mountains.
Ptolemy's own map does not survive, but is known from manuscript copies made during the Middle Ages and from the text of the Geography, which gives coordinates and place names. Ptolemy almost certainly never visited Ireland, but compiled the map based on military, trader, and traveller reports, along with his own mathematical calculations.
The map by Pietro Coppo was one of the last world maps to feature the "Dragon's Tail" extending southwards from the far eastern extremity of Asia, the last vestige of Ptolemy's landlocked depiction of the Indian Ocean, nearly 1,500 years earlier.
Detailed map of the Ptolemaic Egypt. While ruling Egypt, the Ptolemaic Dynasty built many Greek settlements throughout their Empire, to either Hellenize new conquered peoples or reinforce the area. Egypt had only three main Greek cities—Alexandria, Naucratis, and Ptolemais.
English: Ptolemy's map of the Mediterranean superimposed on a modern map. File:Bunbury Vol 2 Map 08 Ptolemy p 578.jpg was transformed to a rectangular projection in QGIS. The outline was traced, and then superimposed on a modern map on the same projection. The meridian of Greenwich was used as a reference for the alignment
It is a map of the Old World, shown as Africa and Eurasia. Although Ptolemy's map had received new updates, the Portuguese discoveries in Africa were removed during the revision. The map includes twelve wind heads that surround the outer area, and a land bridge that encloses the Indian Ocean. [1] The Ulm Ptolemy
Note that Ptolemy, like many early geographers, believed the Indian Ocean to be a closed sea, and maps based on Ptolemy's work show the Golden Chersonese located within a closed basin. Arab geographers were aware that the idea of the Indian Ocean as a closed basin was a mistake by the 8th century, for example in the work of al-Khwārizmī ...