摘要:围绕机场净空条件对于机场的设计与管理的重要性，本文基于三维可视化、GIS及BIM技术，提出了一种快速机场三维净空评估可视化方法。该方法首先通过参数化等方式快速建立并融合机场障碍物限制面以及机场主要建筑物、飞行区、地形等三维模型，生成周边已有障碍物三维建筑；其次在三维图形引擎中通过地理配准技术完成整个机场及其净空的孪生映射，开展障碍物评估可视化仿真，实现以多种地理坐标输入的机场周边新建建筑的定位、限高计算与分析及批量输入输出等功能；最后打包形成机场三维净空评估可视化信息平台原型系统，为设计阶段和管理运行阶段提供便捷高效的分析工具。

Abstract: Based on the importance of airport clearance conditions for airport design and management, this article proposes a fast visualization method for airport 3D clearance assessment based on 3D visualization technology, GIS technology, and BIM technology. The method first quickly establishes and integrates 3D models of airport obstacle restriction surfaces, main buildings of the airport, flight areas, terrain, etc. through parameterization and other methods, to generate 3D buildings with existing obstacles in the surrounding area, Then, the twin mapping of the entire airport and its clearance is completed through geographic registration technology in the 3D graphics engine, and visual simulation of obstacle assessment is carried out for the entire airport. The positioning, height limit calculation and analysis, batch input and output, and other functions of newly built buildings around the airport are achieved through various geographic coordinates input. Finally, the prototype system of the airport 3D clearance assessment visualization information platform is packaged and formed, Provide convenient and efficient analysis tools for the design phase and management operation phase.