Abstract: Considering the high labor cost, heavy work intensity and low efficiency of the traditional measurement procedures, this paper presents a naked-eye 3D mapping method based on UAV tilt photogrammetry. The ContextCapture is used to model the 3D scene, based on which the topographic map is drawn by using PSG software in a naked-eye 3D environment. A real-world case study in Ouyanghai town, Guiyang county, Hunan province is used to demonstrate the effectiveness of the proposed method. A 1:500 large-scale cadastral mapping is carried out and the accuracy is verified. The errors in horizontal and elevation are 0.046 m and 0.048 m, respectively, which are less than 0.05 m required by the code. Therefore, the proposed method in this study can produce results which satisfy the accuracy requirements of 1:500 scale cadastral mapping and improve the efficiency.

Key words: UAV tilt photogrammetry, real scene 3D model, 3D naked-eye mapping, large scale, accuracy evaluation