Spatial data model is the core and base of three dimensional geographic information system design.
空间数据模型是地理信息系统设计的核心和基础。
In this dissertation, networked information releasing technology was applied to part design in CAD system, brought forward a new three dimensional modeling method by networked parameter drive.
本文将网络化信息发布技术应用于CAD系统的零件设计，提出了通过网络化参数驱动建立三维模型的新方法。
This system can accomplish the design of three-dimensional worm wheel hob, construction design and the engineering drawing's automatic achieving.
该系统可完成蜗轮滚刀的三维实体设计、结构设计与工程图的自动生成等工作。
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