Extraction of Building's Feature from Laser Scanning Data

With the rapid development of digital earth and 3D GIS,the speedy capture of 3D spatial data and image data is becoming the bottleneck restricting its development.The system integrated laser scanning technology can realize almost real-time capture of spatial information although it has defects such as huge amount of dataset,discrete points with no topology relations,etc.In this paper an information mining method,by which the geometry features of urban buildings can be extracted directly from the original data captured by laser scanner,is proposed.The principles and algorithms adopted are presented.The method has succeeded to process the data derived from the vehicle-borne laser scanning system that is supported by the Project 863,to extract building features,to rebuild 3D models and to realize 3D visualization.Finally some conclusions are given.