The GPS-technology is already worldwide in its operational mode for some years. It enables kinematic positioning of the camera center. The determined object coordinates X0, Y0, Z0 of each camera center can then be another kind of observations in an aerial triangulation (AT). Herewith, it can reduce the number of ground control points and might accomplish a cheaper and more efficient AT. Therefore, the GPS-supported AT becomes an operational standard today. This paper presents results in our study cases and analyzes the accuracy and reliability of a GPS-supported AT.