Corrections of The Collected Independent Observed Differences Simplified solution of spatial model rotation by using three control points to suit the pocket calculators. Investigations of the best calculated level of an object by different methods. A gnomonic world map Elementary rotation angles of an orthogonal matrix (orientation matrix) Height measurement with stereo-orthophoto A proposed closed-form solution of absolute orientation. Methods for the determination of the elements of interior orientation for close range photogrammetry. A simple formula for the absolute orientation.