Abstract
Model deformation or displacement of picture points after absolute orientation is discussed as a fuction of observational error of photographic co-ordinates. As a simple example, the case of a mathematical grid plate is analysed by six point method with numerical discussions for two cases of observation : mono-ocular co-ordinate comparator method and stereo-comparator method. Further the author gives the influence of the error of geodetic co-ordinates of control points upon the displacement of model co-ordinates and an idea in selecting control points in accordance with the requirements for the accuracy of picture points in consideration.
