基于机载LiDAR数据的DEM获取和精度影响因素分析——以沈阳摄区为例  

DEM Acquisition and Accuracy Analysis Based on Airborne LiDAR Data--Take Shenyang as an Example

作　　者：于笑雨 Yu Xiaoyu(Shenyang Geotechnical Investigation&Surveying Research Institute Limited Company,Shenyang 110004,China)

机构地区：[1]沈阳市勘察测绘研究院有限公司,辽宁沈阳110004

出　　处：《城市勘测》2021年第6期95-99,共5页Urban Geotechnical Investigation & Surveying

基　　金：沈阳市勘察测绘研究院有限公司科研项目(HC20191205003)。

摘　　要：以沈阳摄区(13456 km^(2))机载LiDAR点云数据获取及处理项目为依托,利用机载激光雷达系统开展IMU/GPS辅助LiDAR航空摄影,采用POS与CORS站数据联合解算,获取沈阳区域的点云数据;通过对点云数据处理、人工编辑、保留合格的地面点,获取DEM数据;设计布控严密的高程精度检测点位,采用高精度检测方法,内业统计精度,成果高程中误差满足技术设计要求。影响基于机载LiDAR点云数据获取的DEM高程精度是多因素的,大量的实践和研究,文中综合分析了精度影响因素。Based on the project of DEM and DSM obtained from Airborne LiDAR point cloud data in Shenyang(13456 square kilometers),using Airborne LiDAR system develop aerial photography assisted IMU/GPS,jointing settlement with POS and CORS data,getting the point cloud data of Shenyang area;DEM data is obtained by processing point cloud data,manually editing and retaining qualified ground points;Designing the strict control of elevation accuracy detection points,using high-precision detection methods,statisting the accuracy of elevation data,the results meets the technical design requirements.Many factors affect the DEM elevation accuracy obtained from Airborne LiDAR point cloud data,and the influencing factors of accuracy are analyzed in this paper.

关 键 词：点云数据 DEM获取 点位布控 精度统计 精度分析 

分 类 号：P225.2[天文地球—大地测量学与测量工程] P237[天文地球—测绘科学与技术]