三维GIS环境下的地质体可视化和特征分析  

GEOLOGICAL BODY VISUALIZATION AND CHARACTERIZATION BASED ON 3D GIS

作　　者：曾新平[1] 吴健生[2] 杨自安[1] 郑跃鹏[1] 朱谷昌[3] 张普斌[3] 

机构地区：[1]中国地质大学(北京),北京100083 [2]北京大学城环系,北京100871 [3]有色金属矿产地质调查中心,北京100814

出　　处：《地质与勘探》2005年第1期72-76,共5页Geology and Exploration

基　　金：国家"十.五"科技攻关项目课题(编号:2001BA609A-04)资助。

摘　　要：地质体的三维可视化建模是三维GIS研究的一个重要方向,具有重要的应用价值。三维GIS环境下的地质体可视化的两个关键方面是地质体的表面模拟和可视化实现,文章介绍了地质体三维可视化的基本框架,以带约束Deluanay剖分法为例阐述了地质体表面模拟的原理和方法,并从取景变换、消隐、光照模型、纹理映射等方面论述了可视化的具体实现方法。最后以西部某铜矿为例,建立了三维可视化地质体模型(一个地层矿体综合模型和一个矿体三维模型),阐述了三维可视化建模的基本过程和方法,并对两个模型进行了地质特征分析。As an important part of 3D GIS, 3D visualization modeling for geological body has great research values. Two key aspects of geological modeling are surface modeling and visualization. In this paper, a basic framework of geological modeling of 3D visualization is presented. Theory and procedure of surface modeling for geological body are expounded through an example of conditional Delaunay triangularization, and realization of visualization is discussed based on viewing transformation, blanking, illumination model, and texture mapping. Taking a copper deposit in western China as an example, 3D visualization geological models are established and analyzed after expounding the basic procedure and method of 3D visualization modeling.

关 键 词：三维GIS地质体 可视化 表面模拟 特征分析 

分 类 号：P628[天文地球—地质矿产勘探]