Abstract: The snow projects of Winter Olympic Games will be held in areas with complex terrains, high mountains and dense forests. In order to minimize environmental impacts, reduce cut and fill, and to control investment, the design work relies on fine and accurate data. This paper takes the Yanqing Zone of 2022 Beijing Winter Olympics as an example, using UAV remote sensing and LiDAR technology to obtain data. Then, high-resolution digital orthophotos and high-precision digital elevation models are produced to construct 3D scenes, with design model imported. The results of this paper provide practical technical support for the information sharing among the Winter Olympic Organizing Committee, owners and relevant government departments. This paper shows the potential of the application of 3D geographic information technology in large-scale projects in mountainous areas, and can be referenced for the design of mountain ice and snow projects.

Key words: Winter Olympics, 3D reconstruction, 3D GIS, mountain competition areas, plan assisting