移动3DGIS服务实现关键技术综述

Overview on 3DGIS Mobile Edge Computing Technologies

数字地球的概念提出以来,三维地理信息系统(3DGIS)一直是国际数字地球协会的研究目标,极大地提升地理空间信息的感知能力和精度,广泛运用于在军事和民用范畴。但是由于三维数据有限并且精确的三维模型的显示需要很强的计算机性能,所以实现三维地理信息服务尤其是移动服务困难重重。由于其信息量巨大,不同于传统如二维矢量导航的GIS功能,实现三维移动服务需要依赖网格简化和边缘计算的研究。网格简化是为了减少三维模型的不规则三角网TIN的数量以降低计算机计算的压力;边缘计算是为了节约珍贵的IP传输资源充分利用智慧城市的边缘服务器,以提升计算效率和性能。

Since the advent of Digital Earth, playing significant role no matter in civil or military use, 3DGIS expands the cognition as the stress of International Society of Digital Earth. However, due to the strong need of computing capacity and precious 3D models, tough problems are numberous for 3DGIS services, mobile ones in particular. Unlike traditional 2D vectorial navigations with tiny information volume, the realization of 3D mobile services depends on mesh simplification and edge computing. Mesh simplification is able to decrease the quantity of triangular irregular network (TIN), while edge computing takes full advantage of edge servers within smart cities and economizes precious IP transmission resources, so as to load off the pressure on computing efficiency and capacity.