Abstract: Most traditional achievements in railway surveying and designing are 2D topographic map, but 3D ones are expressed through CAD system. Designers are unable to integrate survey with design. Application of 3D GIS in railway surveying and designing map not only bring about unify in gaining data, applying and dealing with data. But also be shown through multidimension and dynamic state. Specific technique of the systems includes gaining and handling data. Integrating and managing data, visible data

Key words: railway surveying and designing, 3D GIS, unify

摘要： 传统的铁路勘测设计成果多为二维地图，三维表示则独立地以其他CAD系统实现，勘测设计无法集 成到同一平台 。而三维GIS应用于铁路勘测设计则可以实现数据获取、处理与应用的一体化、表示的多维化 与动态化 。 具体技术包括数据获取和处理、数据集成管理、数据可视化等

关键词: 铁路勘测设计, 三维GIS, 一体化