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The use of hachures—short lines/dashes that give a sense of the shape and steepness of terrain—highlight the mountain ranges along the west coast of this map of Sumatra. Many rivers flow east from the mountains to the Malacca Strait.

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.

Multiple maps from the Aceh War, spread over 12 sheets. Includes maps of fortifications, trenches, battle formations; building plans, including the Aceh Sultan’s palace; topographic maps; and drawings of a ‘kotta mara’ (fortified raft).