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This late 19th century large-scale (1:30,000) map show just a section of the Siak River, in the Riau province of Sumatra. Bathymetry (water depth) is shown in figures to aid navigation, with various landmarks noted along the river’s banks.

Produced by the British Admiralty’s Hydrographic Office, this map includes various navigational aids, such as maritime routes, bathymetry (sea depth), tide and current data, and elevations (side views of hills and mountains to use as landmarks).

An early 19th century map of Singapore’s southern coast and islands, with bathymetry (sea depth), shoals and reefs, anchor points, and notes to aid navigation. The roads and main buildings of Singapore city are also shown.

This map of the Straits of Malacca features shoals and reefs, bathymetry (sea depth), drawings of side views of landmark mountains (elevations) and written observations, all designed to aid navigation.

A map of the China Sea between Malaya, Sumatra and Borneo. The numbers indicate sea depth (bathymetry), and there are drawings of the side views of some of the islands (elevations), both used to aid navigation. Some maritime routes are also marked.

A late 18th century navigation map of the waters between the islands of Java, Madura and Bali. The web of lines is a rhumbline network, the numbers indicate sea depth (bathymetry), and there is an inset map of the Bay of Ballambouang, Java.

A late 18th century map of maritime Southeast Asia by the French geographer Jacques Nicolas Bellin (1703–1772). The title refers to the ‘Stretto della Sonda’ (Sunda Strait), the strait between the islands of Sumatra and Java.

This map uses colour to identify regions in late 18th century Southeast Asia, many of which roughly correspond to modern countries: Pegu=Myanmar, Tonkin/Cochin China=Vietnam, Lao =Laos, Siam=Thailand, Malaya=Malaysia, Philippin Islands=Philippines.

A page from Abbé Prévost’s ‘Histoire Générale des Voyages’. The top map shows the Bay of Laphao on Timor, while the other drawings are side views (or ‘elevations’) of mountains on the region’s islands to use as landmarks when navigating.

The many navigation aids marked on this map, including bathymetry (sea depth), anchor points, shoals, and elevations of hills, were designed to guide ships around this part of the west coast of Timor. The Dutch fort Concordia is also marked.

This 18th century maritime navigation map charts the waters between the islands of Java, Sumatra and Borneo. A route south towards the Sunda Strait, as taken by the French ship Mascarin in March and April 1772, is highlighted.

A plan of the port city of Batavia in the 18th century. Small ships can be seen transporting goods along the river to the pier, and the street plan also includes churches, shopping areas and hospitals, as noted on the map’s detailed legend.