James Fitzroy McCarthy (1853–1919) was an Irish surveyor and cartographer who played a prominent role in the delimitation of

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...

(then known as Siam)'s borders in the late nineteenth century, helping transform the country into a modern nation-state. He served as the first Director-General of the

Royal Thai Survey Department The Royal Thai Survey Department ( th, กรมแผนที่ทหาร) is a Special Services Group of Headquarters, Royal Thai Armed Forces () tasked to conduct land and aerial survey, geodesy and geophysics works in Thailand. The headqu ...

, which was established in 1885.

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