2022年第4期江西测绘江西测绘江西测绘江西测绘基于无人机影像的河道表面流速流向测绘汤璞陈林华谷浩然杨东伟(南昌工程学院水利与生态工程学院江西南昌330099)摘要:内河航道河道表面流速流向测定是水运工程设计中的重要内容,表面流速流向资料是通航论证的重要基础数据之一。论文介绍了一种新的基于无人机影像的河道表面流速流向测绘方法。利用定点连续拍摄的具有一定重叠度的航空影像,结合地面像片控制测量,经过航测内业数据处理生成具有坐标信息的正射影像图(DOM),在CAD绘图软件中量测测流浮标的点位坐标,计算流速并绘制河道表面流向线。该方法已成功应用于九江市湖口县红光码头扩建工程河道表面流速流向测绘。关键词:无人机航空影像;表面流速流向;测流浮标;正射影像;流速流向计算基金项目:2020年江西省大学生创新创业训练计划项目,编号202011319004作者简介:汤璞(1972-),男,副教授,主要研究方向为大地测量、航空摄影测量。E-mail:83426950@qq.comSurveyingandMappingofRiverSurfaceVelocityandDirectionBasedonUAVImagesTANGPuCHENLinhaGUHaoranYANGDongwei(SchoolofHydraulicandEcologicalEngineering,NanchangInstituteofTechnology,Nanchang330099,China)Abstract:Thesurveyingofsurfacevelocityanddirectionofinlandwaterwaysisanimportantcontentinthedesignofwatertransportengineering,andthedataobtainedisimportantfornavigationdemonstration.AnewmethodofriversurfacevelocityanddirectionsurveyingbasedonUAVimagesisintroduced.Usingfixed-pointcontinuousshootingaerialimageswithacertaindegreeofoverlap,combinedwithsurveyingofgroundphotocontrolpoints,adigitalorthophotomap(DOM)withcoordinateinformationisgeneratedthroughinternaldataprocessingofaerialsurvey,todealwiththepointcoordinatesoftheflowbuoyintheCADdrawingsoftware,andcalculatetheflowvelocityanddrawthesurfaceflowlineoftheriver.ThismethodhasbeensuccessfullyappliedtothesurveyingandmappingofthesurfacevelocityanddirectionoftheriverintheHongguangwharfprojectinHukouCountyofJiujiangCity.Keyword:UAVImage;SurfaceVelocityandFlowDirection;FlowBuoy;OrthophotoImage;VelocityandFlowDirectionCalculation1前言内河航道河道表面流速流向测定是水运工程设计中的重要内容,表面流速流向资料是通航论证的重要基础数据之一...