耦合GIS和游戏引擎的数字孪生系统构建与实现

Construction of Digital Twin Platform Based on the Combination of Game Engine and Geographic Information System

数字孪生技术的蓬勃发展,极大地推动了智慧城市的建设。基于三维GIS平台和基于游戏引擎二次开发是搭建数字孪生平台的两种途径;但基于三维GIS技术搭建的数字孪生平台三维场景表现力弱,基于游戏引擎搭建的数字孪生平台空间分析能力不足。鉴于此,提出了一种游戏引擎与地理信息平台联合驱动的数字孪生平台构建方法,通过游戏引擎强大的渲染技术和物理引擎改善了常规三维地理信息用户的视觉体验;并以广州市白云区为例,设计开发了智慧白云地理信息平台,实现了白云区全域三维数据和模型的加载、分析和可视化。经运行测试,三维模型可视化效果逼真,系统功能丰富,运行流畅,可推广应用于智慧城市的规划和管理。

The development of digital twin technique boosts smart city construction tremendously in recent years. GIS-based development and game engine-based development are two main pathways of digital twin platform construction. On one hand, GIS-based digital twin platform exhibits mediocre performance on the aspect of rendering of 3D city scenario. On the other hand, game engine-based digital twin platform lacks spatial analysis capabilities compared to most GIS platforms. A novel method was proposed to construct digital twin platform based on the combination of GIS and game engine. This two-engine-based digital twin platform inherits advantages from both GIS platform and game engine, in which various spatial analysis function inherited from GIS can be performed in cinematic-level 3D city scenario. An example of Baiyun District was introduced in this paper to verify the platform performance.