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A topographical and geological map of southern Sumatra, over four sheets. Areas of igneous and sedimentary rock, coal, fossils, petroleum, active volcanoes and hot springs are marked, along with mountains, rivers and marshland, roads and settlements.

A map of the administrative divisions of Sumatra and the Malay Peninsula. The mountains of western Sumatra and the central Malay Peninsula are represented by hachures: short lines/dashes that give a sense of the shape and steepness of terrain.

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.