Application of single-lens UAV oblique photography in mathematical accuracy inspection of DSM
The conventional methods for mathematical accuracy inspection of the digital surface model(DSM)results in realistic three-dimensional(3D)scenes are inefficient and fail to meet the requirements of frequent updates over large areas.This paper compared the advantages and disadvantages of five-lens and single-lens oblique photography in terms of data acquisition efficiency,data storage,and cost of use and determined the use of single-lens unmanned aerial vehicle(UAV)oblique photography for the mathematical accuracy inspection of DSM.By analyzing the impact of different numbers of control points laid out in the single-lens oblique photography modeling on the accuracy of the 3D model results,it was found that a control point density of 400-600 m could ensure model accuracy.Furthermore,the efficiency of single-node and multi-node computers in aerial triangulation and 3D modeling was compared,determining the hardware configuration of single-node computers for aerial triangulation and multi-node computers for 3D modeling.On this basis,a consistency comparison of the conventional method and the oblique 3D model method in the inspection work was carried out in the experimental area.The inspection results obtained by the two methods were basically consistent,and the oblique 3D model method could greatly improve the mathematical accuracy inspection efficiency of DSM,which can meet the requirements of large-area DSM inspection work.
万方数据
维普
