Development Status and Implementation Research of Three-Dimension Digital Map

Three-dimension digital map has become an important development direction of map with the fast development of the computer and spatial data acquisition technology, and it has brought a tremendous impact to our lives in the network environment. The paper described the development status and theoretical foundation of the three-dimension digital map, then introduced the construction principle of real three-dimension digital map and virtual three-dimension digital map, and pointed out the importance of the computer graphics in the building of three-dimension digital map. According to the current three-dimension digital map products, the paper provided three methods building three-dimension digital map, namely, CAD technology, OpenGL technology and GIS-based software technology, and analyzed the advantages and disadvantages of those methods. In the end, the paper contributed to the reasonable suggestions for the development and the application prospect of three-dimension digital map.