一种循序渐进的无人机航测实践教学模式

A Progressive Practical Teaching Mode of UAV Aerial Survey

以有效培养学生实践能力为目标,提出了一种循序渐进的无人机航测实践教学模式,分为基本能力实训和强化能力实训。基本能力的外业实训通过无人机地面站设置2D航线以获取垂直影像,内业实训利用数字摄影测量网格系统(Digital Photogrammetric Grid,DPGrid)软件生产数字高程模型(Digital Elevation Model,DEM)、数字正射影像(Digital Orthophoto Map,DOM)、数字线划地图(Digital Line Graphic,DLG),Pix4Dmapper软件生产数字地表模型(Digital Surface Model,DSM)、DOM,DPGrid软件分模块按步骤执行且人机交互多,更适合学生基本能力的实践教学;强化能力的外业实训通过无人机地面站设置3D航线以获取倾斜影像,内业实训通过Agisoft Metashape和ContextCapture软件进行倾斜影像处理,生产3D模型,ContextCapture软件的三维重建效果好,Agisoft Metashape软件的分模块按步骤执行过程详细,更适合学生强化能力的实践教学。

In order to effectively cultivate students'practical ability,a step-by-step practical teaching mode of UAV aerial survey which includes basic ability training and enhanced ability training was proposed.The field training of basic ability could obtain vertical images by setting 2D route through UAV ground station;interior training uses Digital Photogrammetric Grid software(DPGrid)to produce Digital Elevation Model(DEM),Digital Orthophoto Map(DOM)and Digital Line Graphic(DLG);Pix4Dmapper software to produce Digital Surface Model(DSM)and DOM.DPGrid software is implemented step by step and has more human-computer interaction,which is more suitable for the practical teaching of students'basic ability;field training of enhanced ability can obtain oblique images by setting 3D route through UAV ground station,carry out oblique image processing through Agisoft Metashape and ContextCapture software to produce 3D model.The 3D reconstruction effect of ContextCapture software is best.The implementation process of Agisoft Metashape software is detailed according to the steps,which is more suitable for the practical teaching of students to strengthen their ability.