James Fitzroy McCarthy (1853–1919) was an Irish

surveyor Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. A land surveying professional is ca ...

and

cartographer Cartography (; from grc, χάρτης , "papyrus, sheet of paper, map"; and , "write") is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an im ...

who played a prominent role in the delimitation of Thailand (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, which was established in 1885.

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