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The borders on this mid-19th century map of mainland Southeast Asia are colour-coded to show kingdoms, countries and colonial territories. Twelve different scales are shown, as different countries used different measurement systems.

A mid-19th century German map of mainland Southeast Asia showing a mixture of ancient kingdoms (e.g. Cochin-China), administrative districts (Malay States) and colonial possessions (Straits Settlements). Extensive mountainous areas are also featured.

This mid-19th century map of mainland Southeast Asia is divided into regions with colour-coded borders. The Birman Empire/Birmah (Myanmar) is the most detailed, with 10 provinces marked and listed in the map’s legend.

Navigation map of the southern South China Sea, with bathymetry (sea depth), islands, shoals and reefs marked. There are four maritime routes to China marked, with notes on what months or monsoon season to use them. Inset map of Gulf of Thailand.

Navigation map of the southern South China Sea, with bathymetry (sea depth), islands, shoals and reefs marked. There are four maritime routes to China marked, with notes on what months or monsoon season to use them. Inset map of Gulf of Thailand.

Map of India and mainland Southeast Asia, with coloured borders indicating European colonial possessions.

Map of India and mainland Southeast Asia, with coloured borders indicating European colonial possessions.

On this map of Asia, borders are outlined and cities underlined in different colours to show the colonial territories of the European powers: e.g. at this time, Benkulen (Bencoolen) on the west coast of Sumatra is British, and Malacca is Dutch.

On this map of Asia, borders are outlined and cities underlined in different colours to show the colonial territories of the European powers: e.g. at this time, Benkulen (Bencoolen) on the west coast of Sumatra is British, and Malacca is Dutch.