Relief displacement in Aerial Photograph Aerial Photography is one of the most popular part of Remote Sensing. Relief displacement is the radial distance between where an object appears in an image to where it actually should be according to a Planimetric coordinate system. The images of ground positions are shifted or displaced due to terrain relief, in the central projection of an aerial photograph. If a photograph is truly vertical, the displacement of images is in a direction radial from the photograph center. Radial displacement due to relief is also responsible for scale differences within any one photograph, and for this reason a photograph is not an accurate map.
