RESEARCH ON THE CONCEPTUAL FRAME OF THE INTEGRATION OF 3D SPATIAL DATA MODEL
Li Qingquan, Li Deren (Wuhan Technical University of Surveying and Mapping, Wu han,430070)
In this paper, after a summary of 3D spatial data model, the characteristics of 3D spatial data and the necessary of model integration are analyzed. Three spatial data models are presented for 3D application in fields such as urban, geology, marine, etc. They are the integrated model based on TIN and CSG (Construction Solid Geometry),which is used in 3D urban modeling; The hybrid data model based on Octree and TEN(Tetrahedral Network),which is used in geology, marine, etc; And, the general 3D spatial data model based on vector and raster integration.