3D City Model Reconstruction And The Study On Its Application In Urban Planning

Visualization in city 3D scene is core technique of Digital-City. 3D Geographical Information System has become a hot pot in research, development and application of GIS at present. Visualization in city 3D scene realizes information's query and analysis in 3D city scene, based on which it not only provides vision taste for user, make user have geist cognition for city construction, but also make decision-maker, designer and user have more lifelike, impersonal and rational cognition for status in quo of layout and blueprint of design. So it is significant for the research of city sustainable development because visualization in city 3D scene widen the view of city planner, designer and manager, make urban planning and base establishment design are more reasonable and scientific. Combined with the concerned item, the 3D reconstruction of city model, visualization in city 3D scene and its applications in urban planning were researched in this paper.Firstly, simple research and comparison was performed aiming at the research condition of 3D GIS home and abroad. Classified the spatial feature in city, based on which a way to organize the spatial data was put forward.Secondly, put more emphasis on the reconstruction of 3D city model, which involves the 3D terrain and the fuse of Ikonos and terrain. The idea of texture lab and model lab and the unitary thought of city landscape's 3D reconstruction were put forward.Thirdly, using the component-based technology, the paper developed a 3D visualization platform based on the 3D software developing system - VRMap SDK2.0. The main function of the system is below: high-speed travel of 3D municipal scene, graphic and contribute query of construct entity, edit and modify of the feature of scene.Finally, introduce the application of 3D visualization platform in urban planning combined with its function.