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Map of the Kingdom of Siam, featuring mountains, rivers and villages, and surrounded by a yellow border (the border with Upper Burma and China in the north is undefined). The southern part of Siam is shown on an inset map of the Malay Peninsula.

A late 19th century map of the Dutch East Indies on four sheets, detailing maritime routes around the region. There are also inset maps showing railways, rivers, roads, and telegraph systems, as well as individual islands and cities.

This detailed map of the Dutch East Indies in the mid-19th century contains a great deal of information: topographical details, settlements and administrative areas, roads, railways and maritime routes, telegraph lines, inset maps etc.

A sketch of the river networks discharging into the Gulf of Siam (Gulf of Thailand), derived from the observations of mid-19th century American missionaries. Settlements along the rivers are noted, as are areas where sugarcane was grown.

Map based on the expeditions of Jean-François de Surville, a merchant captain with the French East India Company. Some details are from the diary of the French Navy officer Théobald René, Comte de Kergariou-Locmaria, who explored the region in 1785.

Map based on the expeditions of Jean-François de Surville, a merchant captain with the French East India Company. Some details are from the diary of the French Navy officer Théobald René, Comte de Kergariou-Locmaria, who explored the region in 1785.

Map based on the expeditions of Jean-François de Surville, a merchant captain with the French East India Company. Some details are from the diary of the French Navy officer Théobald René, Comte de Kergariou-Locmaria, who explored the region in 1785.

Map of the Menam River (Chao Phraya River) from the city of Ayutthaya (labelled ‘Ville de Siam’), past Bangkok to its mouth in the Gulf of Thailand. Features forts, villages, and a royal palace along the route.

Map of the Menam River (Chao Phraya River) from the city of Ayutthaya (labelled ‘Ville de Siam’), past Bangkok to its mouth in the Gulf of Thailand. Features forts, villages, and a royal palace along the route.

Early navigation map of the South China Sea. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry), both used to aid navigation. A route around the Gulf of Thailand is marked with text and the dates 1643 and 1644.