Photo: Royal Flying Corps aircraft with aerial reconnaissance camera, circa 1916. (Imperial War Museums/Q 33850 via Wikimedia Commons)

Aerial photography was maturing as an important surveying and mapping tool in Canada when the Canadian Geographical Journal published a story on the subject in May 1930. But when did aerial photography first emerge, and what's happened in the years since?

As part of Canadian Geographic’s Throwback Thursday series, photo editor Jessica Finn pieced together the timeline below.

Did we miss any important milestones along the way? Tell us about it in the Comments below.