Research of 3D model construction and visualization of complicated objects in 3D cyber-city

摘要

In order to settle the conflict of the visualization efficiency and the great amount data in digital city in 3d GIS system, the author put forward a 3D data model with LOD ability especially for the complex 3d object such as buildings in 3d city GIS system. In this paper, the author described the components of the complex 3d object, then explained that we can settle the conflict mentioned above by designing a new model that has the capability of describing levels of details, The author expound the basic theory of the model with LOD ability related with the vision point, and then defined several key conceptions, at same time, the author analyzed the principles and the visualization process of the model in 3d space In the end of the paper, the author verified data model through an experiment, the results of the experiment showed that the model put forward is effective and high efficiency.