The Application of Ultra-low Altitude Unmanned Aerial Vehicle Airborne LiDAR in Reconstruction and Extension of Hub Interchange Project
Due to the problems such as difficult target measurement and large inertial navigation errors,high accuracy survey is difficult to achieve in hub interchange reconstruction and extension project.A new method of distance-weighted data processing for ultra-low altitude Unmanned Aerial Vehicle(UAV)Airborne LiDAR with target adjustment which is outside the road is proposed to improve the accuracy of laser point cloud.Considering the density and reflection intensity of the point cloud,it is verified through experiments that the black and white square target with a size of 120 cm×120 cm can be effectively interpreted in ultra-low altitude laser data.This method is applied in the survey and design of the Shiziyang Lin Project,proving that the accuracy of ultra-low altitude UAV laser scanning has been achieved in the horizontal direction better than 5 cm and in the elevation direction better than 2 cm,which satisfies the survey and design of the hub interchange reconstruction and extension project.
Shiziyang Link Projectaerial photogrammetryultra-low UAV LiDARtargetmedian filteringdistance-weighted fitting
NETL
NSTL
万方数据
