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A map showing the results of the 1883 eruption of the Krakatoa volcano. Black numbers indicate sea depth before the eruption; red numbers are after.

A map of the effects of the 1883 Krakatoa volcanic eruption. The orange line is the islands’ outline pre-eruption; the red line is the boundary of the collapsed area. Red numbers are sea depth. Pre- and post-eruption sizes of the islands are listed.

Map of the Minahasa and East peninsulas of Celebes (Sulawesi) focusing on the road system (shown by red lines). There are four inset maps, including one showing indigenous tribal areas, and a list of places with their latitude, longitude and height.

Hand-drawn map of the roadstead—a body of water sheltered from tides/currents, for ships to anchor—at Analaboe (Meulaboh) on the west coast of northern Sumatra. Bathymetry (sea depth), shoals and reefs, and an anchor point are marked.

Two maps of the Dutch East Indies, decorated with drawings of local people and animals. Dutch colonial territory and local sultanates and provinces are highlighted. The heights of Java’s mountains and settlements are displayed in an elevation view.

On this map of the northern tip of the Minahasa Peninsula, the roads have been added in pencil after the map was printed. Similarly, the elevation (side view) of the peninsula’s mountains has the route of a journey added in pencil.

Designed to aid navigation around the western Java Sea, this map features bathymetry (sea depth), current and tide data, and is marked with shoals, reefs and other hazards. Written notes add details at specific locations (e.g. ‘heavy tide rips’).

Navigation map of the Celebes Sea, Makassar Strait and Java Sea, with bathymetry (sea depth), maritime routes, shoals and reefs, and landmark coastal mountains to aid navigation. On two sheets, which may not be from the same original map.

Map of part of the Dutch colonial administrative region (assistant residency) of Benkoelen (Bengkulu, Sumatra), with an inset map of the Mentawai Islands. (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)

Map of part of the Dutch colonial administrative region (assistant residency) of Benkoelen (Bengkulu, Sumatra). Inset map of Nias Island and the Batu Islands. (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)

Map of the eastern half of the Dutch colonial administrative region (residency) of Palembang, Sumatra. A fort is marked in the town of Batoeradja. (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)

Map of the Dutch colonial administrative region (residency) of Riouw (Riau) focusing on the islands and sea passages, with bathymetry (sea depth) marked. (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)