Definition: Aerial photography
UN - Geographic Information Systems
Techniques for taking photographs from an aerial platform, usually a low-flying aircraft. Also sometimes called vertical photography or orthophotography. Air photos are used for photogrammetric mapping, allowing a high degree of accuracy.
United Nations, "Handbook on Geospatial Infrastructure in Support of Census Activities", Department of Economic and Social Affairs, Statistics Division, Studies in Methods, Series F No. 103, New York, 2009