汪凯,陈楠

• 1:福州大学数字中国研究院(福建)
• 2:福州大学空间数据挖掘与信息共享教育部重点实验室

摘要(Abstract)：

针对传统地形特征点提取方法未能全面顾及地形特征点空间特征的问题,该文提出一种顾及空间特征的地形特征点提取方法。该方法在系统分析地形特征点的空间分布差异性、空间耦合性、层次等级性的基础上,采用均值变点法确定适宜阈值,利用成熟的水文分析法提取沟谷线和山脊线。在此基础上,通过窗口分析、矢量分析等方法实现对山顶点、鞍部点、脊线源点、脊线交点、径流源点、径流节点、流域出水口点的有效提取和分级。以福建省九龙江支流吕凤溪流域30 m空间分辨率数字高程模型进行实验。从目视解译、地形模型对比、分级适宜性3个角度对提取结果进行评价,同时分析了空间分辨率对地形特征点提取的影响。实验结果表明,所提方法能有效保证地形特征点提取结果的准确性,空间分辨率对地形特征点提取结果的总数目、最高级别和分级数目以及空间位置具有重要影响。

关键词(KeyWords)： 数字高程模型;地形特征点;空间特征;提取;数字地形分析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（41771423）;; 福建省科技计划项目（2018Y0054）

作者(Author): 汪凯,陈楠

DOI: 10.16251/j.cnki.1009-2307.2021.02.028

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