Delaunay三角网的鄱阳湖水陆地形数据整合研究  

Integration of Poyang lake land and sea terrain data based on constrained edge Delaunay triangulation network

作　　者：肖冰 王亮[2] 徐胜华[2] 梁勇[1] 刘晓[1] XIAO Bing;WANG Liang;XU Shenghua;LIANG Yong;LIU Xiao(School of Information Science and Engineering,Shandong Agricultural University,Tai'an,Shandong 271018,China;Chinese Academy of Surveying and Mapping,Beijing 100830,China)

机构地区：[1]山东农业大学信息科学与工程学院,山东泰安271018 [2]中国测绘科学研究院,北京100830

出　　处：《测绘科学》2019年第1期48-52,共5页Science of Surveying and Mapping

基　　金：中国测绘科学研究院基本科研业务费项目(7771718);公益性行业科研专项(201512010)

摘　　要：针对如何提高水域的综合开发管理能力,实现水陆一体化地形整合的问题,该文在原有DEM格网数据整合的基础上,提出利用基于约束边Delaunay三角网方法进行水陆地形数据整合的方法,即利用迭代交换法实现约束线的嵌入,从而构建约束Delaunay三角网。以鄱阳湖为研究区域,以DEM格网数据和鄱阳湖岸线矢量数据为数据源,利用约束Delaunay三角网方法,创建基于岸线的Delaunay三角网,实现水陆地形无缝整合。实验结果表明,与利用DEM规则格网数据拼接方法进行比较分析,得出在岸线约束条件下构建的Delaunay三角网能更好地表达边缘处地形数据的整合,平滑效果较好。In order to improve the comprehensive development of water management,realize the integration of land and water terrain integration,this paper is based on the data integration of the original DEM grid,proposes the use of land and sea and terrain data integration method based on edge constraint Delaunay triangulation,namely the iterative method is used to embed the constraint lines,so as to construct a constrained Delaunay triangulation.This paper takes Poyang lake as the study area,DEM grid data and Poyang lake shoreline vector data are used as data source,creating a Delaunay triangulation based on the shoreline using constrained Delaunay triangulation method,and realize the seamless integration of terrain.The experimental results show that,compared with the use of DEM grid data registration method,it is concluded that the Delaunay triangulation constructed under the condition of shoreline constraint can better express the integration of topographic data at the edge,and the smoothing effect is better.

关 键 词：岸线 DEM格网数据 DELAUNAY三角网 约束边 影响域 

分 类 号：P208[天文地球—地图制图学与地理信息工程]