空间数据模型是地理信息系统设计的核心和基础。
Spatial data model is the core and base of three dimensional geographic information system design.
数据模型是建设应用型地理信息系统的基础。
Data models are the bases of an appliance geography information system.
数据模型是建设应用型地理信息系统的基础。
Data models are the bases of an appliance geography information system.
应用推荐