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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).

This late 19th century map of Southeast Asia shows the best maritime routes around the region, according to the time of year. There are also inset maps highlighting the rivers and southern islands of Singapore, and the sea depth around Labuan Island.

This mid-17th century map of Southeast Asia is from Isaac Commelin’s book describing the voyages of the Dutch East India Company ‘Begin ende voortgangh…’. There is an inset map of the island of Botton (Buton Island, southeast of Celebes (Sulawesi)).