基于改进AKIMA算法的等高线山顶点提取  

Peak Extraction from Contour Based on the Improved AKIMA Algorithm

作　　者：何桂芳[1] 刘民士[1] 费立凡[2] HE Guifang;LIU Minshi;FEI Lifan(School of Geographic Information and Tourism,Chuzhou University,Chuzhou 239000,China;School of Resources and Environmental Sciences,Wuhan University,Wuhan 430072,China)

机构地区：[1]滁州学院地理信息与旅游学院,安徽滁州239000 [2]武汉大学资源与环境科学学院,湖北武汉430072

出　　处：《测绘科学技术学报》2019年第4期400-405,共6页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(41601499);安徽省高校自然科学研究基金项目(KJ2017A415)

摘　　要：山顶点是重要的地形特征点之一,其自动提取是数字地形分析的重要内容之一。研究从等高线数据中提取山顶点的角度出发,采用AKIMA算法的改进方法——三点求导分段三次多项式插值方法,将其应用于等高线山顶点提取及其高程插值,并分别以等高线数据和DEM数据作为源数据进行山顶点提取实验。研究结果表明:与邻域分析方法相比,本方法具有更高的算法效率的同时还能保证更高的正确率,且提取的山顶点高程精度符合要求。The peak is one of the important topographic feature points,and its automatic extraction is one of the important contents of digital terrain analysis.An improved method of AKIMA algorithm——three-point derivative piecewise cubic polynomial interpolation method is proposed while extracting the peak from the contour data.The method is applied to the peak extraction of the contour and its elevation interpolation,and the peak extraction experiment is carried out with the contour data and DEM data as the source data.The research results show that compared with the neighborhood analysis method,the method proposed in this paper has higher algorithm efficiency and can guarantee higher accuracy.At the same time,the elevation accuracy of the peak extracted based on AKIMA algorithm meets the accuracy requirements.

关 键 词：山顶点 等高线 AKIMA算法 插值 高程精度 

分 类 号：P209[天文地球—测绘科学与技术]