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A navigation map of the Anambas Islands in the South China Sea, including shoals and reefs, bathymetry (sea depth), anchor points, current and tide information, and two elevation views of the coasts. Obstructions in the water are marked with letters.

Navigation map of the waters and straits around some of the islands of the Riau Archipelago, between Sumatra and Batam. Bathymetry (sea depth), current and tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked.

Navigation map of the waters and straits around some of the islands of the Riau Archipelago, between Sumatra and Batam. Bathymetry (sea depth), current and tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked.

Navigation map of the Riau Strait between Batam, Bintan and Rempang (Riau Archipelago). Bathymetry (sea depth), current and tide data, reefs, shoals and other obstructions are marked. A second map features improvements to part of the original map.

Map of the east coast of the Aru Islands (Maluku Islands), with bathymetry (sea depth), tides and currents, shoals and other obstructions. An inset map shows the anchorage at islands off the coast, along with elevation views of the islands.

The seas of the Dutch East Indies are the focus of this map, with maritime routes, sea temperature, sea depth, currents and monsoons shown. There are graphs of population by ethnicity, agriculture and livestock, trade and shipping, and trade exports.

A map to aid in the navigation of the rivers leading to Saigon (Ho Chi Minh City, Vietnam). Details include bathymetry (water depth), currents, and a side view (or ‘elevation’) of hills to use as a landmark. Tides are described in written remarks.