不同航高对无人机航测地形制图精度影响研究

Research on effect of different altitudes on accuracy of UAV aerial survey ter⁃rain mapping

为研究不同航高对航测地形图精度的影响,采用大疆经纬M300 RTK多旋翼无人机,对某水库进行4种航高的航空摄影并获取了航摄影像,利用大疆智图软件对数据进行了处理,得到了DOM,DEM,DLG等4D数字产品。将实测数据与航测成果进行对比,并进行了精度评定和分析,阐述了不同航高对无人机摄影测量地形制图的精度影响。结果表明:所采用的4种航高飞行获取的数据能够满足植被较少区域大比例尺地形制图要求。研究成果可为无人机在地形图测绘及相关领域的应用提供参考。

In order to study the influence of different aerial heights on the accuracy of aerial survey topographic maps,we used DJI Jingwei M300 RTK multi-rotor UAV to conduct four kinds of aerial photography of a reservoir with regular operation.After obtaining aerial images,the data were processed by DJI Terra software to obtain 4D dig⁃ital products such as DEM,DOM and DLG,and then the accuracy was evaluated and analyzed by comparing the measured data with the aerial survey results.The effects of different aerial heights on the accuracy of terrain map⁃ping by UAV photogrammetry are elaborated.The results show that the data obtained by the four aerial altitude flights can meet the requirements of large-scale terrain mapping in sparsely vegetated areas.The research results can provide some reference value for the application of UAV in topographic mapping and related fields.