为此，在开发自然保护区信息管理系统时，建立了基于关系型数据库的地理数据模型。

Therefore, geographic data model based on relation typed database is established in developing information administrative system of nature reserves.

youdao

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.

youdao

本文在分析和总结了早期和近期GIS几种数据模型的优缺点的基础上，对地理空间进行了重新理解，给出了一个面向对象的概念数据模型。

Compared with several other data models used in early and recent GIS, the author gives his own idea of what is a geographical space, and then puts forward a new object-oriented conceptual data model.

youdao