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A nautical chart of the Indian Ocean showing bathymetry (sea depth), including in great detail around the seas and straits of Southeast Asia.

Map of the Indian Ocean showing maritime routes, including some to and around Southeast Asia, where they pass through the Strait of Malacca, the Sunda Strait, and the straits between the Lesser Sunda Islands.

This map of Asia is marked with the routes taken through Southeast Asia by the British Royal Navy captain James Cook, and the French explorer Lapérouse. The title also refers to two other explorers: Louis Antoine de Bougainville and William Dampier.

This map of Asia is marked with the routes taken through Southeast Asia by the British Royal Navy captain James Cook, and the French explorer Lapérouse. The title also refers to two other explorers: Louis Antoine de Bougainville and William Dampier.

Map of the Bay of Bengal, with the western coast of mainland Southeast Asia. Shoals, reefs and islands are marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation.

Map of the Gulf of Siam (Gulf of Thailand) with shoals and small islands marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation. There is an inset map of the Redang Archipelago.

Map of the Bay of Bengal, with the western coast of mainland Southeast Asia. Shoals, reefs and islands are marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation.

Map of the Gulf of Siam (Gulf of Thailand) with shoals and small islands marked. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation. There is an inset map of the Redang Archipelago.

Map of the South China Sea between mainland Southeast Asia and the Philippines. Shoals and reefs, especially the Paracel Islands (‘Poulo Parcellas’), are shown. Bathymetry (sea depth) is indicated by the numbers marked along coastal routes.

This map features eight expedition routes across the South China Sea from 1752 to 1763. The web of lines is a rhumbline network, and bathymetry (sea depth) is marked. The place names are in French, but with an English title and notes.

Map marking the routes through maritime Southeast Asia of two delegations: a French delegation from Brest, France to Siam in 1685; and a Siamese delegation from Siam to Brest in 1686. A note next to Aceh records a sea battle against Portugal in 1616.

This map features maritime routes: between Siam and Batavia; and five routes of the explorers Juan Gaetan and Olivier du Nord (dated 1542) east of the Philippines. The cartouche has a colourful illustration of Asian people in traditional costume.