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The border of the Tenasserim Division of British Burma (Tanintharyi Region, Myanmar) is highlighted in orange on this set of six map sheets, showing the boundary with Siam (Thailand) to the east, and the islands off the west coast.

Map of Asia featuring steamship routes—including around Southeast Asia—connecting ports such as Penang, Singapore, Batavia (Jakarta), Saigon, Bangkok, Rangun (Yangon), Manila, Macassar (Makassar) etc. There is also an inset map of Singapore.

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

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 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.

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.

Two coastal navigation maps: one of the Mergui Archipelago off the west coast of Myanmar; and one of Phuket (‘Isle Junkseilon’) and the surrounding islands off the west coast of Thailand. Both feature bathymetry (sea depth), shoals and reefs.

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.

Two coastal navigation maps: one of the Mergui Archipelago off the west coast of Myanmar; and one of Phuket (‘Isle Junkseilon’) and the surrounding islands off the west coast of Thailand. Both feature bathymetry (sea depth), shoals and reefs.

Spread over two sheets, this map of India also features the west coast of mainland Southeast Asia. There is also an inset map of the bay of Ashem (Banda Aceh, Sumatra), featuring bathymetry (sea depth), islands, shoals and reefs, and anchor points.

Spread over two sheets, this map of India also features the west coast of mainland Southeast Asia. There is also an inset map of the bay of Ashem (Banda Aceh, Sumatra), featuring bathymetry (sea depth), islands, shoals and reefs, and anchor points.

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.