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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.

Map of the residency of Ambon in the Maluku Islands, divided by colour-coded administrative borders. There are inset maps the Banda Islands—including the nutmeg plantations and the town of Neira with its fort and hospital—and of Dutch New Guinea.

Map of some of the Maluku islands around the Banda Sea, colour-coded by their administrative region, and with an elevation showing heights of mountains. (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)

Two maps of routes around the Flores and Banda seas—through the straits between the Lesser Sunda Islands and the Maluku Islands—towards China. Includes a rhumbline network—a web of lines to help plot routes—bathymetry (sea depth), shoals and reefs.

Although mainly a navigation map—with a rhumbline network and elevations of mountains—there are also many terrestrial details shown, such as settlements and mountains. The inset map of Hoeamohel details plantations and the cultivation of nut crops.

This colourful hand-drawn portolan (nautical) chart was designed to aid navigation. It features a rhumbline network (the web of interconnected lines), bathymetry (sea depth), shoals and reefs, anchor points and written notes.