输电线路的数字微地形自动提取方法  

Automatic Extraction of Digital Micro Landform for Transmission Lines

作　　者：周访滨[1,2] 孟凡一 邹联华 李泽琛 王俊 ZHOU Fangbin;MENG Fanyi;ZOU Lianhua;LI Zechen;WANG Jun(School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;Key Laboratory of Special Environment Road Engineering of Hunan Province,Changsha University of Science&Technology,Changsha 410114,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518061,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]特殊环境道路工程湖南省重点实验室(长沙理工大学),湖南长沙410114 [3]深圳大学土木与交通运输工程学院,广东深圳518061

出　　处：《武汉大学学报（信息科学版）》2022年第9期1398-1405,共8页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(41671446);湖南省自然科学基金(2021JJ30702);湖南省重点实验室开放基金(kfj140502);长沙理工大学学术学位研究生科研创新项目(CX2020SS17)。

摘　　要：微地形是输电线路工程安全运行、电线积冰风险区划和线路建设期能耗计算等工作的重要基础,实现输电线路微地形的合理提取是复杂地形条件下电网工程建设的前提与保证。针对传统输电线路微地形提取存在决策知识模糊、主观因素影响大和缺少定量提取指标等问题,依据规程中微地形分类体系,提出了以地形位置指数、坡度、相对高程和水体距离为特征因子的组合表达输电线路微地形提取决策方案,利用数字地形分析技术建立了输电线路微地形自动提取方法。以2012—2018年某电网公司9条输电线路域栅格数字高程模型数据进行提取实验,实验结果与分析表明,所提方法能够有效提取垭口地形、高山地形、抬升地形、峡谷地形和水汽地形5类典型输电线路微地形,且揭示了微地形分布与线路灾害发生的相关性,可为电网建设可行性论证、线路精细化设计等提供技术支持。Objects:Micro landform is an important basis for safe operation of transmission lines engi⁃neering,the risk division of lines icing and the calculation of energy consumption during the construction pe⁃riod of transmission lines.As the national grid extends and voltage levels increases,there are a lot of trans⁃mission lines passing through the micro landform area and damaged seriously.The traditional macro geo⁃morphologic map can not show the micro landform characteristics accurately.It is subjective and costly for identifying micro landform by experts on the spot base on aerial photography and satellite images.Further⁃more,it is difficult to meet actual engineering requirements.The automatic extraction micro landform of transmission lines is not only a requirement for digital transmission lines landform analysis precisely,but al⁃so a prerequisite and guarantee for the construction of power grid projects under complex landform condi⁃tions.Methods:According to the classification system of micro landform in the specifications,the micro landform types of transmission lines were investigated and five micro landform types including yakou,mountain,uplift,canyon and vapor were proposed.The micro landform type with yakou,mountain,up⁃lift,canyon focuses on regional terrain complexity and relief,as while vapour landform focuses on the causes of the disaster.A decision-making scheme was proposed by terrain position index,slope,relative elevation and water distance,and a method of transmission line micro landform extraction based on grid digital elevation model(DEM)was constructed.About the vapor landform,the water distribution data were applied to the experimental area,the water area units were divided,and water body distance was calculated by grid statistics.Results:9 transmission lines DEM data of a power grid company during 2012—2018 were used for extraction experiment.The micro landform type of yakou,mountain,uplift,canyon and vapor was extracted effectively,the position and tendency of the micro landfo

关 键 词：地形提取 栅格数字高程模型 微地形 输电线路 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P217[天文地球—测绘科学与技术]