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 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 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. All above present the feasible and complete way to the implementation of the system.