| 基于三角网构建海底DEM的抽稀算法 |
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| 引用本文： | 冯宇瀚,殷晓冬,王少帅,郭江龙.基于三角网构建海底DEM的抽稀算法[J].海洋测绘,2012,32(6):33-35. |
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| 作者姓名： | 冯宇瀚 殷晓冬 王少帅 郭江龙 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金项目，中国博士后科研基金项目 |
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| 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。
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| 关 键 词： | 数字高程模型 三角网 拓扑 数据抽稀 |
A Method for Data Thinning Based on the Topology of Triangulation Irregular Net to Construct Submarine DEM |
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| FENG Yuhan,YIN Xiaodong,WANG Shaoshuai,GUO Jianglong.A Method for Data Thinning Based on the Topology of Triangulation Irregular Net to Construct Submarine DEM[J].Hydrographic Surveying and Charting,2012,32(6):33-35. |
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| Authors: | FENG Yuhan YIN Xiaodong WANG Shaoshuai GUO Jianglong |
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| Institution: | 1.Department of Hydrography and Cartography,Dalian Naval Academy,Dalian 116018,China; 2.Department of Operation and Training,Dalian Naval Academy,Dalian 116018,China) |
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| Abstract: | 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. |
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| Keywords: | digital elevation model triangulation irregular net topology data thinning |
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