关键词: 增强现实, 城市地下管网, ARCore, 高精度定位, Unity3D, 七参数坐标转换

Abstract: Aiming at the problem that the pipeline map space management system is not strong, the construction monitoring and collision detection are inflexible, the ground building model data storage and rendering, the urban underground pipe network augmented reality system is designed. Pipeline data are loaded by high-precision positioning service, and the latitude and longitude coordinates of the pipeline are converted into Unity3D data by a seven-parameter coordinate transformation method. The virtual and real fusion of the pipeline model is realized by ARCore. Visual Inertial Odometry（VIO） algorithm is used to implement tracking of mobile devices. The experimental results show that the system can realize the integration of pipeline model and real-life scene, multi-directional real-time viewing, real-time interaction and other functions, enhance the spatial decision support ability of pipeline network management, and reduce the difficulty of massive ground building data processing.

Key words: augmented reality, urban underground pipe network, ARCore, high precision positioning, Unity3D, seven-parameter coordinate transformation