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

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。

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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。

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Distributed geographic information is analyzed and data model of geographic spatial information is proposed.

论文对分布式地理信息进行分析，提出了地理空间信息的数据模型。

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