基于DEM脊点跟踪的山脊线编码与分级
发布时间：2019-01-17 14:31
【摘要】：山脊线是构成地形骨架的主要地形特征线之一,它与沟谷线共同控制着地形整体走势。山脊表现为与沟谷类似的层次分支结构,但却不具备沟谷线水流方向明确的特性。本文在借鉴沟谷线分级思想基础上,提出一种基于DEM脊点跟踪的山脊线编码分级方法,通过修正流域边界线提取山脊线,找到各等级脊线起始点,搜索并编码出相应等级的完整山脊线。通过宜君和韭园沟两个小流域进行验证,并与流域边界最高级分级法对比。结果表明,本文编码方法可以有效反映出山脊线层次,山脊线等级划分相对细致,与同一阈值下沟谷线等级匹配性较好。该研究可为地形结构特征分析提供方法参考,为多尺度地形综合提供技术支撑。
[Abstract]:Ridge line is one of the main topographic characteristic lines, which control the whole trend of terrain together with valley line. The ridge is similar to the valley in hierarchical branching structure, but it does not possess the characteristic of clear flow direction of the valley line. Based on the idea of valley line classification, this paper presents a method of ridge coding classification based on DEM ridge tracking. By modifying the watershed boundary line, the ridge line is extracted, and the starting point of each grade ridge line is found. Search for and encode the corresponding rank of complete ridge line. Two small watersheds, Yijun and Jiuyuanguo, were verified and compared with the most advanced classification method of watershed boundary. The results show that the coding method in this paper can effectively reflect the level of ridge line, and the classification of ridge line is relatively meticulous, and it matches well with the level of valley line at the same threshold. The research can provide a method reference for the analysis of topographic structure and technical support for multi-scale terrain synthesis.
【作者单位】： 南京工业大学测绘科学与技术学院;
【基金】：国家自然科学基金项目(41101360)~~
【分类号】：P208
本文编号：2410155
[Abstract]:Ridge line is one of the main topographic characteristic lines, which control the whole trend of terrain together with valley line. The ridge is similar to the valley in hierarchical branching structure, but it does not possess the characteristic of clear flow direction of the valley line. Based on the idea of valley line classification, this paper presents a method of ridge coding classification based on DEM ridge tracking. By modifying the watershed boundary line, the ridge line is extracted, and the starting point of each grade ridge line is found. Search for and encode the corresponding rank of complete ridge line. Two small watersheds, Yijun and Jiuyuanguo, were verified and compared with the most advanced classification method of watershed boundary. The results show that the coding method in this paper can effectively reflect the level of ridge line, and the classification of ridge line is relatively meticulous, and it matches well with the level of valley line at the same threshold. The research can provide a method reference for the analysis of topographic structure and technical support for multi-scale terrain synthesis.
【作者单位】： 南京工业大学测绘科学与技术学院;
【基金】：国家自然科学基金项目(41101360)~~
【分类号】：P208
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