摘要
针对高程图与水深图传统转换方法存在效率低、误差大、难以处理复杂地形等问题,本文提出一种基于Delaunay三角网的高程图与水深图互转方法,通过两次Delaunay三角网构建,实现地形图数据高效、高精度的转换。研究内容主要包括:(1)利用无人机系统和水文站分别获取动态水边线信息和实时水位数据;(2)提出满足临近点、跨河三角化等条件的跨河Delaunay三角网构建方法;(3)提出步长等分均值去波浪方法和点线矛盾检查方法,对生成的等深线(等高线)进行平滑与检查处理。结果表明,该方法在处理不规则和复杂地形时具有良好的准确性、稳定性和适用性。该研究方法为高程图与水深图互转提供了新的技术路径,对水文测量和地理信息处理具有实践意义。
The traditional conversion method of elevation map and bathymetry map has the problems of low efficiency,large error and difficult to deal with complex terrain.This paper proposes an interconversion method of elevation map and bathymetry map based on Delaunay triangular network,which achieves efficient and high-precision conversion of topographic map data by constructing Delaunay triangular network twice.The research mainly includes:①using unmanned aerial systems and hydrological stations to obtain dynamic water edge information and real-time water level data,respectively;②proposing a cross-river Delaunay triangulation network construction method that satisfies the conditions of proximity points and cross-river triangulation;③proposing a step-length equidistributed mean de-waviness method and a point-line contradiction checking method,which are adopted for smoothing and checking of the generated isobaths(contour lines)processing.The results show that the method has good accuracy,stability and applicability in dealing with irregular and complex terrain.This study provides a new technical path for the interconversion of elevation and bathymetric maps,which is of practical significance for hydrographic surveying and geographic information processing.
作者
雷刚
刘超群
刘敏
段汝东
朱运权
李贞
LEI Gang;LIU Chaoqun;LIU Min;DUAN Rudong;ZHU Yunquan;LI Zhen(Sichuan Transportation Survey and Design Research Institute Co.,Ltd.,Chengdu 610017,China;School of Architecture and Urban Planning,Kunming University of Science and Technology,Kunming 650550,China;Yunnan TST Engineering Testing&Appraisal Co.,Ltd.,Kunming 650000,China;School of Artificial intelligence and Big Data,Chengdu College of Arts and Sciences,Chengdu 610401,China)
出处
《测绘通报》
北大核心
2025年第S1期275-280,289,共7页
Bulletin of Surveying and Mapping
基金
国家自然科学基金(52268014)
四川省交通勘察设计研究院有限公司科技项目(232022015)
关键词
高程图
水深图
转化方法
DELAUNAY三角网
无人机系统
elevation map
bathymetric map
transformation method
Delaunay triangulation network
unmanned aerial vehicle(UAV)
作者简介
雷刚(1984-),男,高级工程师,研究方向为工程测量、程序开发与设计。E-mail:52208947@qq.com;通信作者:刘超群。E-mail:634020809@qq.com
