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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.

Produced by the British Admiralty’s Hydrographic Office, this map includes various navigational aids, such as maritime routes, bathymetry (sea depth), tide and current data, and elevations (side views of hills and mountains to use as landmarks).