OPTTIMIZATION AND STRENGTH ASPECTS FOR GEO-REFERENCING DATA WITH TERRESTERIAL LASER SCANNER SYSTEMS

Abstract: Geo-referencing data is one of the most important terrestrial laser scanner data processing steps. It means to collect the separated scans of the object in one scan world coordinate. Geo-referencing, some times called data registration, is important when the scan object, regardless its size, has a significant variation in depth and one scan is not sufficient to describe it geometrically. Methods for data registration have been widely investigated, but practical rules for capturing the data haven't been examined yet. An example, is the distribution of the tie-points which are used in the registration and their position according to the laser scanner position in every two adjacent scans. In order to evaluate the accuracy of the complete model obtained by the scanning process, a lot of measurements in different positions for distance and orientation of the laser scanner have been performed. In this paper the results of the precision achieved using the registration of two adjacent scans are described. Also some practical rules to mange the geometrical distribution of the tie points and generate their optimal location for improving the precision of the final 3D model are examined