摘要
常规无人机航空摄影测量技术由于光学影像难以获取植被深厚且茂密地区的地形地貌数据,因此造成成果质量,尤其是高程精度很难满足工程要求。激光雷达通过获取海量三维点云数据,可极大概率地穿透地表植被,经过分类能够提取高精度地表高程数据。本文以河南省2个抽水蓄能电站工程勘测为例,综合应用无人机机载激光雷达与航拍正射影像的技术方法,充分发挥2种数据在地物判读和地形采集中的优势,减少了外业工作量。经过精度验证,成果满足相应规范要求,同时提供4D产品。充分证明了其在抽水蓄能电站大比例尺地形图测绘中的优越性。
Conventional UAV aerial photogrammetry technology is difficult to obtain topographic and DTM data of deep and dense vegetation areas due to optical images.So it results in that the quality of the results,especially the elevation accuracy is difficult to meet the engineering requirements.However,the LiDAR obtains massive 3 D point cloud data which can penetrate the surface vegetation with great probability,and can extract high-precision surface elevation data after classification.This article takes the engineering survey of two pumped storage power stations in Henan province as an example,comprehensively applies the technical methods of UAV airborne LiDAR and aerial orthophotos,and gives full play to the advantages of the two types of data in ground object interpretation and terrain collection and reduces the workload in the field.After accuracy verification,the results meet the requirements of the corresponding specifications,and 4 D products are also available.This fully proves the superiority of UAV airborne LiDAR in the surveying and mapping of large-scale topographic maps of pumped storage power stations.
作者
姜丙波
柳忠伟
彭云
徐生望
邓勇
JIANG Bingbo;LIU Zhongwei;PENG Yun;XU Shengwang;DENG Yong(Power China ZhongNan Engineering Co.,Ltd.,Changsha 410014,China)
出处
《测绘通报》
CSCD
北大核心
2021年第S01期248-251,共4页
Bulletin of Surveying and Mapping
