Abstract: As an important manifestation of 3D urban landscape, the extraction and quantitative evaluation analysis of skylines are of great significance for urban planning and management. This article is based on airborne laser LiDAR point cloud and building vector data to extract the skyline of some areas along the right bank of the Yangtze River in Wuhan. Three indicators, including contour shape, degree of building height change, and average number of contour turning points, are selected to quantitatively evaluate and analyze the skyline results. The results show that both extraction results are in good agreement with the actual distribution characteristics of land features and landforms. The development and construction on the right bank of the Yangtze River are relatively concentrated, and high-rise buildings have a certain scale and overall height, forming a preliminary waterfront urban skyline with urban silhouettes standing by the water. According to the consequences of skyline, it is divided into multiple block segments according to height, and compared and analyzed based on the average height and mutual difference with the relevant indicator requirements in the Wuhan City Building Management Approval Guidelines, except for a few plot segments, all others meet the requirements.

Key words: LiDAR, building, skyline, quantitative evaluation