3D vector topology model in the Visualization System

To store, access, process and show the spatial geoinformational data easily in the microcomputer environment, the 3D model must be determined. The paper introduces 3D vector topology model in the Visualization System; first, to confirm entity characters in the System based on the information characters of three-dimensional entity in the world. Second, to study and define the 3D entity using the object-oriented approach, and to draw the conclusion-there is only polyhedron geometric class in the 3D vector topological model. Furthermore, it is discussed how to build a 3D vector topology model in the Visualization System. Third, to present what constitutes a polyhedron, which relationships exist among the geometric elements, and how to represent the 3D geometric elements in the Visualization system using an example.