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。
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。
If each unit is regarded as a single linear reservoir, according to their geographic data, and without the history of observed data, the complex parameters of this model basin can be obtained.
如果将每一个单元看成一个单一线性水库，根据其地理数据，无需历史观测资料我们就能方便地获得复杂流域模型的参数值。
The approach of using vector data to make map, which is based on the above model, can quickly acquire the vector geographic information with publishable efficiency.
基于该矢量一体化全局模型的矢量数字成图方法，可快速获取具有出版效能的矢量地理信息。
This paper compared the navigable data with general geographic information data in data model, accuracy and structure, etc.
本文对导航数据与一般的地理信息数据在数据模型、数据的准确性、数据的组织方法等方面进行了比较。
This paper compared the navigable data with general geographic information data in data model, accuracy and structure, etc.
本文对导航数据与一般的地理信息数据在数据模型、数据的准确性、数据的组织方法等方面进行了比较。
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