Metrological Aspects in Terrestrial Laser Scanning Technology

Within the last years airborne and terrestrial laser-scanning (TLS) has become a dominant technique for fast and efficient three-dimensional data acquisition of complex objects. Aerial and kinematic terrestrial laser-scanning follow an approach by combining GPS and inertial navigation systems (INSS). In such mobile multisensor systems the error budget of all sensors positioning and attitude sensors has to be taken into consideration. Therefore, the parameters in accuracy of laser-scanning will be discussed. The recent developments of high precision laser-scanners widened the field of applications such as monitoring tasks in engineering geodesy and geotechnics. A topic in research is the three-dimensional calibration of laser-scanning systems. Despite the importance of investigating and analyzing each component of laser-scanners separately, most users are only interested in resulting accuracies of single points or of derived objects.