Briefing images issued by INS Department of Propaganda, November 2004

Photo reading and interpretation: Photo reading refers simply to the identification of features shown on photos. Photo interpretation, however, is broader in scope, comprising both the recognition of features and the drawing of inferences as to their significance, in the light of all available information. Direct observation is supplemented by deduction, obscure or hidden features are visualised with the guidance of previous experience, and the implications of the whole picture with respect to the observer's particular objectives are ascertained, in so far as possible. (H. T. U. Smith, Aerial Photographs and their Applications, London: D. Appleton-Century, 1943, p. 54)