International audienceThe vision and aerial photography have filled geographers with enthusiasm during the first half of the XXth century before the interest for this sort of document became tempered with new epistemological orientations of geography. the writers of this article want to show that the oblique aerial photography thanks to the essential distance it provokes and thanks to the readability of landscapes it affords is a media of great use to analyze geographical spaces. Its lack of “geometrical”rigour does not prevent reporting the results obtained on mapping imagery with a constant scale or on sections provided with a double scale to obtain a”horizontal”result of collected informations. The article is based on two studies of Medi...