Accuracy Analysis of Large Scale Topographic Map by UAV Oblique Photography
This paper probes into the application of tilting photography technique of multi-rotor UAV in generating 3D model and drawing large scale topographic map.After obtaining the image data of the survey area by field aerial survey of UAV,coordinate conversion,aerial triangulation,accuracy check and other operations are carried out successively to build the three-dimensional model of the survey area.Then DP-Mapper mapping software is used to draw large scale topographic map based on 3D model.Some check points are selected from the survey area,the measured coordinates are compared with the coordinates of the topographic map,and the point error of the check points is calculated by the formula.According to the"1:500 1:1 000 1:2 000 Field digital mapping procedures GB/T14912-2017",the plane accuracy of the topographic map drawn can meet the accuracy requirements of 1:500 topographic map,and the elevation accuracy can meet the three-level accuracy requirements of 1:500 topographic map.
万方数据
维普
