Abstract: Aiming at the occlusion problem of inclined photography buildings in complex urban areas, a UAV route planning method is proposed. Firstly, the method confirms the height range of the route based on the reconnaissance results of the preliminary survey area, and chooses the proper height and verifies the rationality. Then it confirms the route direction and calculates the overlap degree through the most densely built area. Moreover, according to the critical point of the side view image, the route of this area is designed. This paper takes a large-scale enterprise park as an example to carry out real-life 3D modeling experiments. The relevant results indicate that the 3D model established in the light of this method keeps complete side texture of each building. Compared with the route automatically planned by flight control software, this model has higher resolution, better texture and whole effect.

Key words: UAV, oblique photograph, route planning, side-looking image, 3D model