(1) Those computational steps required to determine the location and orientation of a camera's coordinate system in the coordinate system used for object space. (2) Those computational steps required to determine tilt, direction of the principal line, flight height, preparation of templates at the scale used for rectification, distances and angles, and preparing aerial photographs for rectification. The resulting values are set on the circles and scales of a rectifier or transforming printer. (3) Adjustment of a rectifier by setting, on the rectifier's controls, the precise values needed for orientation; these values having been calculated beforehand.