The spatial data model is basic to the research of GIS.
模型是地理信息系统(GIS)研究的基础内容。
This is the spatial data model which is proposed by OGC.
第四个是统一空间数据模型。
The aim of establishing spatial data model is to reflect the real world.
空间数据模型建立的目的是反映现实世界。
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。
Therefore, it is especially important to design and establish the data model for spatial database.
因此，设计并创建空间数据库数据模型显得尤为重要。
The GML-based spatial data exchange model and SVG-based information visual model are proposed.
提出了基于GML空间数据交换和基于SVG的信息可视化模型。
The GML-based spatial data exchange model and SVG-based information visual model are proposed.
提出了基于GML空间数据交换和基于SVG的信息可视化模型。
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