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This late 18th century map of Asia uses colour to differentiate various regions, with mainland Southeast Asia in blue, and maritime Southeast Asia in yellow, red, green and blue.

This map shows part of the Moolenvliet canal (now known as Batang Hari) that passes through the centre of Batavia (Jakarta). The Dutch colonial authorities originally dug the canal in the 17th century by diverting part of the Ciliwung river.

A late 18th century map of Asia with regions divided by colour-coded borders, and detailing rivers, mountains, reefs and shoals.

A late 18th century map of Asia with regions divided by colour-coded borders, and detailing rivers, mountains, reefs and shoals.

Map charting the three expeditions of the British Royal Navy captain James Cook, including HMS Endeavour’s journey via Batavia (Jakarta) in 1770, and HMS Resolution’s journey through the South China Sea (after Cook’s death) in 1779.

This map of the Sunda Isles (‘Isles de la Sonde’) (with red borders) and Maluku Islands (‘Isles Moluques’) (green borders) also includes mainland Southeast Asia (blue borders), the Philippines (yellow borders) and New Guinea (green borders).

A late 18th century map of Asia featuring rivers, mountains, reefs and shoals. Regions are colour-coded, with the borders of the kingdoms of mainland Southeast Asia in green, and the islands of maritime Southeast Asia in yellow and red.

A late 18th century map of Asia published in London by John Bowles, with regions indicated by colour. Central Borneo is labelled ‘Part inhabited by the Biayos’, which is seen on many contemporary maps, often with the comment ‘a savage people’.

Nautical charts, like this late 18th century example of the north-west coast of Borneo, were designed to help ships navigate. The numbers marked along the coastline and sea routes indicate the depth of the sea (bathymetry).

Nautical charts like this are detailed around the coasts and on the seas (e.g. river mouths, islands, shoals and reefs) while the interiors are blank. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry).

Maritime routes had to be adjusted in response to the changing monsoon seasons, as is seen on this late 18th century map of the Indian Ocean. Drawings of the heads of children blowing—called ‘wind-heads’—are used to indicate wind direction.

Map of the Gaspar Strait, off the east coast of Sumatra. The web of lines is a rhumbline network, numbers indicate sea depth (bathymetry), and there are side views of islands (elevations), all to aid navigation. Five 18th century routes are marked.