ABSTRACT
The most important objects of interest according to the users were buildings, traffic network, and vegetation. Aerial photogrammetry is one of the main techniques for obtaining three dimensional (3D) building information. The workflow was divided into preparation, cadastral map edition and pruning, 3D reconstruction of buildings, and quality control. Due to the development of scanning systems and improvements in the accuracy of direct georeferencing, Airborne Laser Scanning became a feasible technology to provide range data in the early 1990s. In order to be able to separate methodological development from development due to improvement of data, it is recommended to use the same test sites, with old and new laser scanning and aerial data, for future verifications. The value of such empirical investigations is rather high and has been confirmed not only by the high number of participants but also by many fruitful discussions on the results of this investigation presented at various conferences and meetings.
