Édouard-Gaston Deville

Édouard-Gaston Daniel Deville, ISO, FRSC (February 21, 1849 – September 21, 1924) was the first to perfect a practical method of photogrammetry, the making of maps based on photography. He was the Surveyor General of Canada (1885–1924) and Canada's Director General for the Bureau of Surveys (1922–24). During his lifetime, Canadian surveyors had used his phototopography to map 83,678 square kilometres, roughly the size of Ireland (84,421 square kilometres).