| The construction and application of city3D has become the inevitable trend of the development of geographic information technique, and it is also an important part of the "digital city" construction. The management mode of3D model data is one of the most basic and crucial technologies, and its quality directly affects the development prospects of3D technology.In view of the disunity of management unit and organization method between the present city level3D model data organization and2D data management mode which caused relative chaos, bigger workload of interconnected management and higher cost of3D data management, this article combined the implementation of Hangzhou city3D database system construction projects and proposed a kind of3D data management mode based on map. The main technical routes are as follows:(1) In the matter of3D model data structure, this article made a comprehensive analysis and study for the contradictions and problems caused by division of map making from the level of vertical stratification and transverse framing to solve the key problems of model data organization.(2) In the model of data organization and management, this article made a research and design of the relational city3D model database which is based on map and aimed at original model management, and realized the3D model database management which doesn’t depend on the3D platform. At the same time, the organization and management mode which is consistent with the2D data is the key content of this research.(3) In the data space index and scheduling, through comprehensive analysis and comparison, this article made a research and design of four forks tree, R tree and KD tree hybrid scheduling scheme based on the map of spatial index, thus ensured the efficiency of3D space index and scheduling based on the map management.The research and implementation of3D model data management mode based on map has more prominent advantages than the traditional3D data management mode in the long-term management of3D data, the synchronization update of2D or3D data, the sharing of2D or3D attribute data and city level data and other related applications. |
