矿山无人机航测成图质量的控制方法分析

Analysis of Control Methods for the Quality of Mine Drone Aerial Surveying and Mapping

无人机航测是测绘领域传统航空摄影测量的重要补充,需进一步控制无人机航测成图质量。本文以焦岱镇矿山为例,布设测区控制点,从影像重叠度、航带弯曲度、航带内最大高差、像片倾角检查航测成图影像质量,借助摄影测量系统进行内业数据精度分析,包括影像数据分析、空中三角测量精度分析和成图精度分析,得出航测地形图平面误差0.327m,高程误差0.337m,与实测成图相比高程误差较大,针对性提出采用高程扭曲公式获取高程改正值,提高倾斜航带高程精度,保证矿山无人机航测成图质量得到有效控制。

UAV aerial survey is an important supplement to traditional aerial photogrammetry in the field of surveying and mapping,and further control of the quality of UAV aerial survey mapping is needed.This article takes the Jiaodai Town mine as an example and sets up control points for the survey area.The quality of aerial survey mapping images is checked from the aspects of image overlap,curvature of aerial belts,maximum height difference within aerial belts,and inclination angle of photos.Using a photogrammetric system,the accuracy of office data is analyzed,including image data analysis,aerial triangulation accuracy analysis,and mapping accuracy analysis.The plane error of aerial survey topographic maps is 0.327m,and the elevation error is 0.337m,Compared with the measured mapping,the elevation error is relatively large.Therefore,it is proposed to use the elevation distortion formula to obtain the elevation correction value,improve the elevation accuracy of the inclined aerial strip,and ensure the effective control of the quality of aerial surveying mapping by mining drones.