Abstract:This study takes the campus of Yango University in Mawei District, Fuzhou City as an example to study the feasibility and accuracy of 3D modeling of UAV tilt photography in complex terrain. It adopts DJI Matrice series of UAVs carrying cloud eye series of five-lens cameras to collect tilt image data in the survey area. A real-time kinematic instrument connects Qianxun CORS account to complete the acquisition of control points in the survey area. With ContextCapture, a real-world modeling software of Bentley company, the data collected from the external operation is processed for internal operation. Consequently, the high-resolution 3D scene model, Digital Surface Model (DSM) and True Digital Orthophoto Map (TDOM) of the campus are obtained, and the accuracy of the 3D model is analyzed. In order to ensure the accuracy of the model, the experiment improves the accuracy of the model by setting more control points, making sub-regional aerial survey, and improving the overlap of heading and the side direction. Experimental results reveal that the mean square error of the plane position and the mean square error of the elevation of the 3D real scene model are less than 5 cm, which can meet the requirements of large-scale measurement and provide important data support for the secondary development of the 3D real scene model of the campus in the later stage.