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。
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。
This paper mostly introduce three issues of Vehicle Navigation System, that are navigation geographic database standard, data structure and data model, superior road.
本文主要介绍了汽车导航系统中的导航地理数据库标准、数据结构与数据模型、最优路径三个问题。
In this scene system, Derive ocean geographic information database from actual electronic chart data, and according to these database build ocean terrain and entity model database.
本视景系统从真实的电子海图数据中提取海洋地理信息数据库，并根据这些数据库建立海洋地形模型利实体模型库。
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。
The paper finish building channel geographic information data base, through demand analysis, conceptual design, logic design, physical design, data base model building and a series of step.
通过需求分析、概念结构设计、逻辑结构设计、物理结构设计以及数据库模型的建立等一系列步骤，最终完成了航道地理信息数据库的建设。
The paper finish building channel geographic information data base, through demand analysis, conceptual design, logic design, physical design, data base model building and a series of step.
通过需求分析、概念结构设计、逻辑结构设计、物理结构设计以及数据库模型的建立等一系列步骤，最终完成了航道地理信息数据库的建设。
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