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On this map of Sumatra, the west coast mountain ranges contrast with the rivers to the east. An inset map of Singapore focuses on jungles along the coasts, and features bathymetry (sea depth) around the south coast and along the Singapore Strait.

A map of the China Sea between Malaya, Sumatra and Borneo. The numbers indicate sea depth (bathymetry), and there are drawings of the side views of some of the islands (elevations), both used to aid navigation. Some maritime routes are also marked.

This 18th century maritime navigation map charts the waters between the islands of Java, Sumatra and Borneo. A route south towards the Sunda Strait, as taken by the French ship Mascarin in March and April 1772, is highlighted.