Research on Rapid Construction Method of Urban 3D Models

After a summary of the research status of construction methods of urban 3D models,this paper proposes a scheme for the rapid reconstruction of 3D spatial models in urban areas,which involves building terrain models through Triangulation Irregular Net(TIN)for once,extracting building models through digital images and constructing building models through voxel growth method of Constructive Solid Geometry(CSG).In the process,the three methods have been integrated for the first time so the rapid construction of urban 3D models can be finally achieved.