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Geography and Cartography Reference library
Constantin Canavas
The Oxford Encyclopedia of Philosophy, Science, and Technology in Islam
...Sezgin claims that a map ( Ṣūrat lauḥ al-Rasm ) found in a copy of the geography Masālik al-abṣār by Ibn Faḍl Allāh al-ʿUmarī ( 1340 ) kept in Topkapı Sarayı in Istanbul (MS Ahmet III, 2797 ) is essentially the world map of al-Maʾmūn’s geography project ( Sezgin, 1987 , Map 11, “Maʾmūnic Map”). This claim has been contested by other scholars, such as Tibbetts, who consider the possibilities of later (e.g., Ottoman) modifications of the extant Ṣūrat lauḥ al-Rasm as quite probable and regard “Maʾmūn’s map still as an enigma” ( Sezgin, 2000 , p. 20;...
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