基于约束的DTM的建立  

Establishment of digital terrain model based on constraints

作　　者：王崇倡[1] 张迪[1] 杨彦嫣[1] 

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2006年第6期823-826,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省教育厅基金资助项目(05L181)

摘　　要：为了精确表达地表的形态,在建立DTM时必须考虑地性线等约束条件。在研究约束DTM的各种生成算法的基础上,通过对无约束的生长法进行改造,在构建Delaunay三角网前插入边界约束条件,构建完Delaunay三角网后加入地性线的约束条件,生成最终的约束Delaunay三角网。通过使用VC++6.0和ARX开发工具,在AutoCAD环境下实现了约束DTM的建立和显示。经数据测试,证明整个算法结构严谨、简单,执行效率高。In order to express the terrain accurately, land feature lines constrained conditions must be taken into account when establishing DTM. In this paper, several algorithm of generating constrained digital terrain model are studied. By using the method of reforming no-constrained growing algorithms, we insert boundary constrained conditions before establishing the Delaunay triangulation and insert the land future lines constrained conditions after establishing the Delaunay triangulation, then generate final constrained Delaunay triangulation. The constrained digital terrain model is displayed in AutoCAD which is developed by VC＋＋6.0 and ARX. It is proved that the entire algorithm is rigorous, simple and efficient.

关 键 词：生长法 约束条件 三角网 数字地面模型 ARX 

分 类 号：P208[天文地球—地图制图学与地理信息工程]