Design and Realization on 3D GIS of Shijiazhuang Underground Railway
研究了世界首例地下国家主干线铁路工程的建设和运营，提出时空数据模型，结合里程滑块动态查询，解决了隧道施工中连续空间信息的存储和管理难题，并构建了三维GIS系统。
This paper researched the first case of construction and operation of underground state mainline railway engineering in the world.Firstly,a spatial-temporal data model is proposed,which based on integration of time,event and state,secondly combined with the dynamic queries of construction information of Mileage slider,the difficulties of storage and management of continuous spatial information in tunnel construction is solved.Finally,a 3D GIS of Underground Railway is built.functions such as 3-D modeling,levy land and remove,underground pipeline management,construction schedule management,emergency aided decision support is realized.