基于三角网构建海底DEM的抽稀算法  

A Method for Data Thinning Based on the Topology of Triangulation Irregular Net to Construct Submarine DEM

作　　者：冯宇瀚[1] 殷晓冬[1] 王少帅[1] 郭江龙[2] 

机构地区：[1]海军大连舰艇学院海洋测绘系,辽宁大连116018 [2]海军大连舰艇学院作战与训练系,辽宁大连116018

出　　处：《海洋测绘》2012年第6期33-35,39,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金项目(61071006);中国博士后科研基金项目(20110490189)

摘　　要：为压缩海量水深数据,实现在高分辨率下快速、完整和准确地表示海底地形,提出了一种基于三角网拓扑结构的数据抽稀方法。该方法利用Delaunay三角网的模型优势,快速寻找与水深点相关的区域。根据水深点对区域贡献度大小决定取舍。实验表明,该方法充分顾及海底地形变化趋势,能有效识别海底地形特征点,并且抽稀速度快、失真小、精度高。For compressing a large number of depth data to present submarine DEM quickly, inextenso and accurately, a new method for data thinning based on the topology for triangulation irregular net is brought forward. The advantage of D-Tin is used to search the area related with the depth points and then their significance are analyzed based on their contributions. The experiment indicates that this method, being of high speed ,high accuracy and low distortion, can adequately recognize the variety of landform and identify the characteristic spot.

关 键 词：数字高程模型 三角网 拓扑 数据抽稀 

分 类 号：P208.2[天文地球—地图制图学与地理信息工程]