Research and Application of 3D Real Modelling from Oblique Images for City Planning

With the continuous advancement of urban informationization, the requirements of diverse information systems are abundant and various. Meanwhile the integrity of information resources is also improved. The 3D real model data has become an important part in the construction of digital city database with its perceptual intuition, objectivity and accuracy characteristics. Taking a region in Beijing as an example, the oblique photogrammetry is carried out by using multi-rotor unmanned aerial vehicle (UAV) and the 3D city models are made by the Context Capture which is a powerful tool for image control point matching, aerial triangulation encryption and 3D real scene modeling. Moreover, the quality of 3D real model is quantitatively evaluated by the point accuracy assessment and plane accuracy assessment. The experimental results show that the median error of plane accuracy position is 0.01315 m and the median error of elevation accuracy is 0.02621 m. Furthermore, the median error of both directions are less than 10 cm, and the elevation accuracy is slightly higher than that of plane