3d Modelling of Buildings Using Laser Scanning and Spectral Information

In this paper an approach for 3D building modelling based on laser scanning data combined with spectral information is presented. Airborne laser scanners offer a new efficient method for 3D data acquisition (DEMs) in urban environment. However, for automatic building recognition and reconstruction, other 3D objects like vegetation or vehicles have to be excluded from the acquired DEM. Therefore, a strategy for stepwise elimination of areas and objects which are not buildings will be explained. These procedures are based on spectral as well as shape and size parameters. After a separation of the remaining 3D objects as building hypotheses, a generic approach for modelling of building shapes by planes will be described. As results of an intersection process wireframe models are obtained. Finally, first experiences with/on this approach in a test area are presented and the achieved accuracy is discussed.