| 一种自动识别地性线的新方法 |
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| 引用本文： | 刘颖,翟京生.一种自动识别地性线的新方法[J].海洋测绘,2005,25(3):21-23. |
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| 作者姓名： | 刘颖 翟京生 |
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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. 海军海洋测绘研究所,天津,300061 |
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| 摘 要： | 通过等高线树构建出各条等高线的空间关系，采用计算几何中的凸壳和Douglas算法，建立了似Douglas变换模型，提出了一种自动识别山脊线和谷底线的新方法。理论和实践结果表明，用该方法提取的地性线结构性强、精确度较高，用于地貌形态的自动综合中是完全可行的。
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| 关 键 词： | 等高线树 似Douglas变换 地性线 自动识别 |
| 文章编号： | 1671-3044(2005)03-0021-03 |
| 修稿时间： | 2005年3月14日 |
A New Method of Automatically Identifying Orographic Character Line in Contours |
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| LIU Ying,ZHAI Jing-sheng.A New Method of Automatically Identifying Orographic Character Line in Contours[J].Hydrographic Surveying and Charting,2005,25(3):21-23. |
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| Authors: | LIU Ying ZHAI Jing-sheng |
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| Institution: | LIU Ying 1,ZHAI Jing-sheng 2 |
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| Abstract: | This paper builds the spatial relationship of contour using contour tree, forms the similar Douglas conversion model by means of convex-hull and Douglas arithmetic, and then puts forward a new method of automatically identifying the ridge line and the valley floor line.The theory and the practice result can prove the method is valid. The orographic character line has a good structure and its precision is high.It can carry out the physiognomy automatic generalization. |
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| Keywords: | contour tree the similar Douglas conversion orographic character line automatic identification |
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