Abstract: [Purposes] As a core region with high urbanization level and great development potential in western China,the Sichuan-Chongqing region is faced with severe challenges to the safety of inter-provincial low-altitude flight due to complex terrain,changeable meteorological conditions and high-density population distribution.[Methods] To address this problem,this paper proposes an automatic planning method for inter-provincial low-altitude visual flight routes coupling multiple factors such as terrain environment,low-altitude meteorology and airspace control,and constructs an evaluation model of route service capacity based on space syntax theory.[Findings]The results show that the integrated method coupling multi-factor elements can generate inter-provincial low-altitude visual flight routes adapting to complex environments and realize quantitative evaluation of route service capacity.[Conclusions]This method can provide technical support for low-altitude flight safety guarantee and high-quality development of regional low-altitude economy.

Key words: low-altitude visual fligh troutes, Sichuan-Chongqing region, real-scene 3D, space syntax, low-altitude economy