| 等高线拓扑关系的构建以及应用 |
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| 引用本文： | 王涛, 毋河海. 等高线拓扑关系的构建以及应用[J]. 武汉大学学报 ( 信息科学版), 2004, 29(5): 438-442. DOI: 10.13203/j.whugis2004.05.014 |
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| 作者姓名： | 王涛 毋河海 |
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| 作者单位： | 武汉大学资源与环境科学学院, 武汉市珞喻路129号, 430079 |
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| 基金项目： | 国家自然科学基金资助项目 ( 4 0 1710 79) |
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| 摘 要： | 提出了等高线拓扑关系的描述框架,其规范化描述形式具有更强的适用性,使用三角网作为工具设计了建立拓扑关系的算法。以提出的拓扑关系描述为基础,具体实现了等高线高程自动赋值,处理过程可以同时考虑开曲线(包括断线)和闭曲线,提高了可靠性和自动化程度,并进一步将断线连接为完整目标,减少了人机交互的编辑工作。
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| 关 键 词： | 等高线 拓扑关系 高程自动赋值 断线连接 |
| 文章编号： | 1671-8860(2004)05-0438-05 |
| 收稿时间： | 2004-02-03 |
| 修稿时间： | 2004-02-03 |
Construction and Applications of Topological Relation Among Contour Lines |
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| WANG Tao, WU Hehai. Construction and Applications of Topological Relation Among Contour Lines[J]. Geomatics and Information Science of Wuhan University, 2004, 29(5): 438-442. DOI: 10.13203/j.whugis2004.05.014 |
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| Authors: | WANG Tao WU Hehai |
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| Affiliation: | School of Resource and Environment Science, Wuhan University, 129 Luoyu Road, Wuhan 430079, China |
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| Abstract: | This paper proposes a novel formalization framework of topological relation of contour lines and elaborates the applications based on it. The idea is concentrated on the continuity of the spatial proximity and the direction among contour lines. Constraint Delaunay TIN on the contour lines is employed to acquire proximal relation of neighboring contour lines. The benefits of the proposed idea are demonstrated experimentally on the time-consuming and error-prone tasks of assigning elevation value to the contour lines and connection of broken contour lines resulted from vectorizing the scanned map. |
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| Keywords: | contour line topological relation automatic labeling connection of broken lines |
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