| 基于联合Delaunay三角网的等高线地形特征提取研究 |
| |
| 引用本文： | 吴凡,粟卫民,杨英伟,邬金.基于联合Delaunay三角网的等高线地形特征提取研究[J].中国矿业大学学报,2007,36(2):172-176. |
| |
| 作者姓名： | 吴凡 粟卫民 杨英伟 邬金 |
| |
| 作者单位： | 1. 武汉大学,地图科学与地理信息工程系,地理信息系统教育部重点实验室,湖北,武汉,430079
2. 武汉大学,地图科学与地理信息工程系,地理信息系统教育部重点实验室,湖北,武汉,430079;湖南地图出版社,湖南,长沙,410007 |
| |
| 基金项目： | 国家自然科学基金;科技部科技基础条件平台建设计划 |
| |
| 摘 要： | 分析了基于等高线的地形特征自动提取过程，提出了一种“联合Delaunay三角网”来探测和分析等高线群的弯曲，同时提出了“三角形局域连接方法”来解决地形特征线连接的难点．结果表明：与传统Delaunay三角网方法相比，利用“联合Delaunay三角网”和“三角形局域连接方法”能自动提取更完整的具有树结构的地形特征线．
|
| 关 键 词： | 等高线 地形特征 Delaunay三角网 弯曲识别 空间数据挖掘 |
| 文章编号： | 1000-1964(2007)02-0172-05 |
| 修稿时间： | 11 17 2005 12:00AM |
Extracting Terrain Features from Contour Maps Based on United-Delaunay-Triangulation Model |
| |
| WU Fan,SU Wei-min,YANG Ying-wei,WU Jin.Extracting Terrain Features from Contour Maps Based on United-Delaunay-Triangulation Model[J].Journal of China University of Mining & Technology,2007,36(2):172-176. |
| |
| Authors: | WU Fan SU Wei-min YANG Ying-wei WU Jin |
| |
| Affiliation: | 1. Department of Cartography and Geographical Information Engineering, Key I.aboratory of Geographical Information System of Ministry of Education of China, Wuhan University, Wuhan,Hubei430079, China; 2. Hunan Cartographic Publishing House, Changsha, Hunan410007, China |
| |
| Abstract: | Based on studying the process of automatically extracting terrain features from contour line groups,a United-Delaunay-Triangulation model(UDT model) was presented to detect and analyze bends of contour lines in group.Moreover,a method named join-locally-in-a-triangle(JLT method) was also put forward to solve the problem of joining terrain feature lines.The results show that terrain features extracted by the UDT model and JLT methods are more complete and possess tree structures than using the former Delaunay triangulation method. |
| |
| Keywords: | contour line terrain feature Delaunay triangulation curve cognition spatial data mining |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
