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Plan of improvements made to the pier at the port in Batavia (Jakarta), including profile drawings of the construction parts. Lines indicate the changing position of the beach and the sandbank over the years, and numbers show the water depth.

Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1823). Planned future works and the ‘Waterkasteel’ fort are also shown.

This simple map of the Dutch East Indies shows the locations of Christian missions in the region in the early 19th century.

This simple map of the Dutch East Indies shows the locations of Christian missions in the region in the early 19th century.

Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1822). Planned future works and the ‘Waterkasteel’ fort are also shown.

This map of Asia features the ancient kingdoms of mainland Southeast Asia, such as the Birman Empire, Siam, Tonquin and Cochinchina. There are labels noting the inhabitants of some areas, such as 'Biajos' and ‘Tedongs’ in Borneo, and ‘Kemoy’ in Anam.

This map of Asia features the ancient kingdoms of mainland Southeast Asia, such as the Birman Empire, Siam, Tonquin and Cochinchina. There are labels noting the inhabitants of some areas, such as 'Biajos' and ‘Tedongs’ in Borneo, and ‘Kemoy’ in Anam.

On this map of Asia, India and mainland Southeast Asia are labelled together as ‘Ost Indien [East Indies]’. In maritime Southeast Asia, the Sunda Islands are coloured yellow, the Maluku Islands and New Guinea are blue, and the Philippines are red.

On this map of Asia, India and mainland Southeast Asia are labelled together as ‘Ost Indien [East Indies]’. In maritime Southeast Asia, the Sunda Islands are coloured yellow, the Maluku Islands and New Guinea are blue, and the Philippines are red.

Navigation chart of part of the South China Sea leading to the eastern entrance of the Singapore Strait. Features bathymetry (sea depth), anchor points, shoals and other obstructions, landmark hills, and detailed explanatory notes.

Chart of the north coast of Java, featuring a rhumbline network—a web of lines to help plot routes—bathymetry (sea depth), shoals, reefs and side views of landmark mountains (elevations), all to aid navigation. With an inset map of nearby islands.

Navigation chart of part of the South China Sea leading to the eastern entrance of the Singapore Strait. Features bathymetry (sea depth), anchor points, shoals and other obstructions, landmark hills, and detailed explanatory notes.