Photogrammetry is creating 3D models of real life objects, people, structures or environments, using (a lot of) photographs. But how does photogrammetry work? The first part of the term, “photo”, comes from the Greek word ph?tos meaning “light”. “Gram” comes from grámma meaning “drawing” & “metry” originates from the word métron meaning “measurement”. Combining these words gives you the simplified definition of the concept, namely: Measuring/simulating objects using photography.