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The border of the Kingdom of Siam (Thailand) and its internal administrative districts are highlighted in yellow. Inset maps show the cities of Bangkok, Chiengmai (Chiang Mai) and Luang Pra Bang (Luang Prabang) in more detail.

This map highlights the colonisation of Southeast Asia, showing French Indochina (green), British Burma and Malaya (orange), the Dutch East Indies (pink), and the Spanish Philippines (green). In the region, only Siam (yellow) is independent.

A map of Siam (Thailand) and parts of Burma (Myanmar), Cambodia and Laos, focusing on the river networks, and the mountain ranges which are represented by hachures: short lines/dashes that give a sense of the shape and steepness of terrain.

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.