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A nautical chart of the Indian Ocean showing bathymetry (sea depth), including in great detail around the seas and straits of Southeast Asia.

A series of four maps of the Indian Ocean—one for each quarter of the calendar year—showing the direction and intensity of the winds, including around the seas of Southeast Asia. There are extensive explanatory notes.

Map of Java and Madura divided into administrative districts, and featuring mountains, settlements and major roads. There is an inset map of the port city of Batavia (Jakarta) and its surrounding fields and countryside.

Map of Java and Madura divided into administrative districts, and featuring mountains, settlements and major roads. There is an inset map of the port city of Batavia (Jakarta) and its surrounding fields and countryside.

Map of the Indian Ocean showing the currents (represented by arrows), including during the North East and North West monsoons. Numbers on the arrows indicate the current’s speed.

Map of the Indian Ocean showing maritime routes, including some to and around Southeast Asia, where they pass through the Strait of Malacca, the Sunda Strait, and the straits between the Lesser Sunda Islands.

This map uses hachures—short lines/dashes that give a sense of the shape and steepness of terrain—to show Java’s mountains. There are also two side views (elevations) of the mountains showing the heights of various road routes across the island.

This map uses hachures—short lines/dashes that give a sense of the shape and steepness of terrain—to show Java’s mountains. There are also two side views (elevations) of the mountains showing the heights of various road routes across the island.

Map of the Asian colonial possessions of the Netherlands (Dutch East Indies), with an inset of the heights of some of the region’s mountains. A note describes the average temperature, barometer reading and magnetic declination in Batavia at the time.

Map of the Asian colonial possessions of the Netherlands (Dutch East Indies), with an inset of the heights of some of the region’s mountains. A note describes the average temperature, barometer reading and magnetic declination in Batavia at the time.

Map of the Asian colonial possessions of the Netherlands (Dutch East Indies), with an inset of the heights of some of the region’s mountains. A note describes the average temperature, barometer reading and magnetic declination in Batavia at the time.

Map of the Asian colonial possessions of the Netherlands (Dutch East Indies), with an inset of the heights of some of the region’s mountains. A note describes the average temperature, barometer reading and magnetic declination in Batavia at the time.