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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.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), shoals and other obstructions are marked, with hills and settlements as landmarks, and elevations (side views of hills) to aid navigation.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), lighthouses, shoals and other obstructions are marked, with trees and hills as landmarks, and elevations (side views of hills) to aid navigation.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), shoals and other obstructions are marked, with hills and settlements as landmarks, and elevations (side views of hills) to aid navigation.

A map to aid navigation around the Bay of Turon (location of modern city of Da Nang, Vietnam). Bathymetry (sea depth) is marked, as is the route of the Dutch ship ‘Jackaij’ on her departure from the bay. An elevation view of the land is shown below.

An early map of the island of Borneo, depicting the natural landscape of mountains, forests, rivers and shoals, and also evidence of human habitation with houses representing settlements.

Two drawings and text from ‘Rerum et urbis Amstelodamensium historia’ by Johannes Pontanus: the port and town of Gamme Lamme on the island of Ternate, with local and European vessels; and a naval battle between Dutch and Portuguese ships.

An early map of the island of Borneo, depicting the natural landscape of mountains, forests, rivers and shoals, and also evidence of human habitation with houses representing settlements, and a port and shipping route along the northern coast.