3D GIS支持下的城市三维地质信息系统研究

介绍了3D GIS的发展现状与应用前景，详细地讨论了基于3D GIS构建的城市三维地质信息系统的设计思路和结构功能。在分析城市三维地质数据多种建模方法的基础上，采用一种基于TIN和TEN的混合数据结构来构建城市三维地质数据建模系统。另外，针对城市三维地质数据的特点，探讨了城市三维地质海量数据的采集与管理、城市三维地质数据信息的Web发布等重要问题，为系统功能的最终实现提供了完整的解决方案。

Study of information system of urban 3D geological data supported by 3D GIS

The status quo of 3D GIS theoretical research and the future of its application are introduced. And an information system for urban geological data is designed based on 3D GIS technique. The details of the train of thought of system design, the structure and functions are also discussed. Based on the review of current 3D geology modeling related to 3D geological data, a new data structure to describe the urban data is given. It is a kind of hybrid data structure based on TIN and TEN, and it is an efficient way to solve the current problem. For the characteristics and requirement of urban geological data, some basic problems met in the carrying out of the system, such as the data acquisition, management of very large-scale database, the broadcast of urban geological information through Web, etc. are discussed further. All above present the feasible and complete way to the implementation of the system.