一种基于不规则三角网的地层等值线绘制方法  

A STRATIGRAPHIC CONTOUR DRAWING METHOD BASED ON TRIANGULATED IRREGULAR NETWORK

作　　者：段友祥[1] 赵琰 孙歧峰[1] 李洪强 Duan Youxiang;Zhao Yan;Sun Qifeng;Li Hongqiang(College of Computer and Communication Engineering,China University of Petroleum,Qingdao 266580,Shandong,China;hengli Drilling Technology Research Institute of Sinopec Group,Dongying 257000,Shandong,China)

机构地区：[1]中国石油大学(华东)计算机与通信工程学院,山东青岛266580 [2]中国石化集团胜利钻井工艺研究院,山东东营257000

出　　处：《计算机应用与软件》2018年第4期249-253,共5页Computer Applications and Software

基　　金："十三五"重大专项(2017ZX05009-001)

摘　　要：等值线图是地图学中最常用的地理要素,是地质资源信息系统中最基础和常见的数据表示形式。针对地质模型其地层可视化的特点,研究和分析传统等值线追踪方法的不足,提出一种基于不规则三角网的等值线分类追踪算法。该方法对数据存储模式进行了简化处理,并结合实际应用要求在VC++与Open Scene Graph的开发环境下,实现了等值线的绘制。通过建立地层属性的映射规则,对等值线图进行了填充,达到了地层三维可视化的真实效果,以某采油厂地层离散数据为例,验证了等值线追踪算法的可行性和正确性。Contour maps are the most commonly used geographic features in cartography and are the most basic and common data representation of geological resource information system.According to the characteristics of the geological model of strata visualization,this paper studied and analyzed the shortcomings of the traditional contour tracing methods,and proposed a contour tracing algorithm based on triangulation irregular network.Combined with the practical requirements,this paper simplified the data storage model and achieved the algorithm of contour tracing in VC++and OpenSceneGraph development environment.The contour map was filled through the establishment of the mapping rules of the formation attribute,achieving the real effect of 3D visualization of the formation.Based on the stratum data of oil production plant,the feasibility and correctness of the contour tracking algorithm were verified.

关 键 词：等值线追踪 不规则三角网 OpenSceneGraph 三维可视化 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]