摘要
地形特征线是地形地貌和地质灾害研究中重要的区域分界线,通常使用ArcGIS软件进行提取。针对传统方法提取的地形特征线后续处理过于烦琐,算法适用性较窄等问题,以图像处理技术为手段,提出了一种以高分辨率格网数字高程模型(DEM)为基础数据提取地形特征线的新方法。该算法结合形态学特征,参考地形特征线的几何形态,把线段从微地貌的角度分解成多种构型,并应用到提取过程中,同时优化已有方法,能够快速提取出特征线。结果表明,提取的特征线基本吻合实际地形特征线,还可提取水库边缘和大型宽谷等平坦地形边缘。相较于其他算法,该方法提取效率得到提升,在解决传统方法出现的问题上提出了新的方向。
Terrain feature line is an important regional dividing line in the study of landform and geological hazards,which is usually extracted by GIS software.Aiming at the problems of complicated follow-up processing of terrain feature lines extracted by traditional methods and narrow applicability of algorithm,a new method of extracting terrain feature lines based on high-resolution grid digital elevation model(DEM)is proposed based on image processing technology.The algorithm combines morphological features and refers to the geometric form of terrain feature lines.Besides,the algorithm decomposes the line segments into various configurations from the perspective of micro geomorphology,and applies them to the extraction process.Meanwhile,the algorithm optimizes the existing methods to extract the feature lines fast.The results show that the extracted feature lines are basically consistent with the actual terrain feature lines,including the reservoir edge and the large wide valley and other flat terrain edges.Compared with other algorithms,the extraction efficiency of this method is improved,and a new direction is proposed to solve the problems of traditional methods.
作者
谢金粮
汤作华
黄映聪
段建兵
XIE Jinliang;TANG Zuohua;HUANG Yingcong;DUAN Jianbing(School of Earth Sciences,East China University of Technology,Nanchang 330013,China;School of Software,East China University of Technology,Nanchang 330013,China;Network and Information Center,East China University of Technology,Nanchang 330013,China;Jiangxi Provincial Engineering Laboratory of Radiology Big Data Technology,Nanchang 330013,China;State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China)
出处
《东华理工大学学报（自然科学版）》
CAS
北大核心
2024年第2期175-184,共10页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金项目(41872243,41202160)
核资源与环境国家重点实验室开放基金项目(NRE1913)
江西省放射性地学大数据技术工程实验室开放基金项目(JELRGBDT202002)
江西省教育厅科学技术研究项目(GJJ200715,GJJ200747)
东华理工大学博士科研启动基金项目(DHBK2018021,DHBK2018034)
核资源与环境国家重点实验室自主基金项目(2020Z13)。
关键词
数字高程模型
地形特征线
微地貌形态学
剪枝
digital elevation model
topographic feature line
micro geomorphology
pruning
作者简介
谢金粮(1999-),男,硕士,主要从事三维地质建模研究。E-mail:1136820958@qq.com;通信作者:汤作华(1969-),男,博士,高级实验师,主要从事计算机技术应用与信息管理研究。E-mail:tjy8611@ecut.edu.cn。
