复杂三维空间对象的模型可视化研究

The Research on Construction and Visualization of Complicated Objects in 3D GIS Systems

针对数字城市三维GIS系统中建筑物复杂三维对象的描述提出了一种结合LOD(Level of detail)可视化能力的三维数据模型,并对该模型的构成机理,在三维空间中可视化过程作了详细分析,并通过原型系统对其进行了验证。

In order to settle the conflict between the visualization efficiency and the great amount data of digital city in 3D GIS , 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 could settle the conflict mentioned above by designing a new model that has the LOD capability. The author expounded the basic theory of the model with LOD ability, and then defined several key conceptions, at the same time, author analyzed the principles and the visualization process of the model in 3D space. At the end of the paper, the author verified data model through an experiment, the results of the experiment showed that the model is effective and of high efficiency.