Abstract: Using the spatial data captured via ground-based three-dimensional (3D) laser scanner, a study on three-dimensional modeling of spatial objects was conducted. Taking a building modeling as the case study, the building objects to be modeled were extracted from the laser scanning data, and noise reduction was carried out on the objects data. To obtain a 3D surface model of the building, the noise-reduced building data were registered and matched with the original scan data, which were re-sampled and registered as well prior to the mosaic process. The triangular meshes of the building model were thus obtained. The modeling result showed that the constructed 3D surface model represented appropriately the geometric features of the building objects. The outdoor experiment indicated that the process mentioned above can bring about rapid 3D visualiz ation modeling of buildings.

Key words: laser scanning, three-dimensional modeling, data processing, triangular mesh