从CAD模型到数码城市GIS模型的若干问题  

Key issues for data transformation from CAD to GIS

作　　者：龚俊[1] 朱庆[1] 眭海刚[1] 宋成芳[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079

出　　处：《武汉大学学报（工学版）》2003年第3期64-68,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目 (编号 :4 0 0 0 10 17) ;973计划资助项目 (2 0 0 2CB312 10 1)

摘　　要：作为数码城市GIS建设重要的数据源 ,三维CAD模型数据在规划设计部门普遍可得 .特别是由于GIS在复杂场景三维建模与编辑方面还不能满足日益增长的需要、大量的数码城市GIS建设在相当长时间内还要继续采用CAD建模方法及其成果的情况下 .分析了CAD与GIS在三维数据模型方面的异同点 ,提出了在数码城市GIS中有效集成应用CAD模型数据的解决方案 ,并着重在数据表示、数据结构和数据转换等方面进行了深入剖析 .实验证明 ,该方法可满足GIS数据处理与表现高效。As an important data source of CyberCity GIS, 3D CAD model data is widely available in design and planning departments. Especially b ecause GIS cannot meet the increasing demand in 3D modeling and editing, CAD mo deling method and its production will be continually adopted. In this paper, the differences and correlation in 3D data models between CAD and GIS are discussed . In addition, the solution is put forward to decide how CAD model data is effic iently integrated into CyberCity GIS. Most important, this paper places a strong emphasis on data representation, data structure and data translation. At last, the experimental results prove that the solution presented in the paper can meet the requirements of CyberCity GIS for data processing and measurable realistic representation with high efficiency.

关 键 词：CAD 数码城市GIS 三维城市模型 集成 

分 类 号：P208[天文地球—地图制图学与地理信息工程]