The Countries in the Southwestern Sea (from the Kuang Yü T'u or The Mongol Atlas)

«The culmination of indigenous Chinese cartography is found in the contributions of Chu Ssu-Pen and his successors who, beginning in the Mongol Yuan Dynasty (1260 -1368), established a mapping tradition that provided the basis of China's cartographic knowledge which was not seriously challenged until the early 19th century. The Mongol conquests, besides promoting the unification of Asia and