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Map of Ara Bay (east coast of Sumatra). Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked. Underwater trenches are shown, with light buoys, and there is an elevation view of the bay.

Navigation map of the northwest coast of Sumatra. Bathymetry (sea depth), anchor points, shoals and other obstructions (clay, coral, mud, stones, sand) are marked, with hills and settlements to use as landmarks.

Fifteen separate maps of bays and river mouths of Sumatra, including bathymetry (sea depth), anchor points, reefs and shoals, and tide data. There is a drawing of the mouth of the Pidada-rivier.

A map of the watershed of the Bila and Pane rivers in northern Sumatra. In addition to many rivers/tributaries, mountains, roads, paths and administrative borders are marked. Side views of mountains (elevations) are shown to use a landmarks.

A geological map, spread over eight sheets, showing the types of rock and minerals found in the Oembilien coalfield, in the Padang Highlands on Sumatra’s west coast. There are also additional geological profiles.

A map of Java with mountains, jungles, animals and crops. Bathymetry (sea depth) is marked, including on an inset map of Batavia harbour. Illustrations include Batavia Castle, and a lion—representing Belgium—receiving tribute and enslaving locals.

A map of west Java with mountains, jungles, animals and crops. Details include sea depth, an inset map of Batavia harbour, and an illustration of a lion—representing Belgium—receiving tribute and enslaving locals. A similar map of east Java was made.

A map of west Java with mountains, jungles, animals and crops. Details include sea depth, an inset map of Batavia harbour, and an illustration of a lion—representing Belgium—receiving tribute and enslaving locals. A similar map of east Java was made.

A map of Java with mountains, jungles, animals and crops. Bathymetry (sea depth) is marked, including on an inset map of Batavia harbour. Illustrations include Batavia Castle, and a lion—representing Belgium—receiving tribute and enslaving locals.

A map of Java with mountains, jungles, animals and crops. Bathymetry (sea depth) is marked, including on an inset map of Batavia harbour. Illustrations include Batavia Castle, and a lion—representing Belgium—receiving tribute and enslaving locals.