geographical database

DEM ( Digital Elevation Model) has become one of the core data of geographical spatial database in many countries and regions, the currentness of DEM is an important measure to evaluate the using value of it.

DEM已成为各个国家和地区地理空间数据库中核心数据之一，现势性是衡量其应用价值的重要指标。

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This paper provides a general model of a large seamless geographical database.

提供了大型地理数据库无缝组织的实例。

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In view of the above logical expression process, this paper models by UML process, designs the corresponding physical storage structure and basic geographic event database to get ready for the subsequent geographical events in the application of the spatial data updating.

针对上述逻辑表达过程进行UML过程建模，设计出相应的物理存储结构和基本地理事件库，为后续地理事件在空间数据更新中的应用打下基础。

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Brief Introduction to Geographical Information System and Space Database

浅议地理信息系统与空间数据库建设

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To achieve multi-level observation, analysis of the geographical situation making use of multi-scale spatial data is becoming increasingly important. Multi-scale spatial data processing and expression has become the core content of the setting up of spatial database.

空间数据的多尺度处理与表达，已成为建立多尺度空间数据库，实现多尺度GIS或无级比例尺GIS的核心内容。

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Model of Geographical Database Based on Relationship Database

基于关系数据库的地理数据库模型

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With the growing demand for scientific management and rational use of land resources and the widespread adoption of Geographical Information System ( GIS), the soil information system has emerged. As a fundamental part of the system, the soil database has gained more and more attention.

伴随着科学管理、合理利用土壤资源的要求和地理信息系统（GIS）应用的扩大，土壤信息系统应运而生，作为其重要组成部分的土壤数据库，也受到了越来越多土壤工作者的关注。

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An example is given to demonstrate how to use the datasets in the Geographical database to perform a LUCC study.

通过实例展示如何用空间数据库中的数据进行土地利用／覆被变化研究。

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The GeoNames geographical database is available for download free of charge under a creative commons attribution license.

GeoNames地理信息数据库可在知识共享归属许可下免费下载。

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The article describes in details the processes of setting up the intranet structure of basic geographical database under the C/ S Model in Qinghai Geological Survey Institute.

以青海地调院局域网建设实例为基础，详细阐述了C/S模式下青海省基础地学数据库网络框架建设的实现途径。

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Topologic Relationships and Editing of Elementary Graphic Objects in Object-oriented Geographical Database

地图数据库中基本图形对象的拓扑关系及其编辑

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This research applied 1:250,000 national geographical database as a major information source and GIS as a basic methodology to investigate the spatial distribution pattern of the rural settlements of Yulin area in North Shaanxi.

本研究以地理信息系统为基本技术手段，以国家1：25万基础地理数据库等数字信息为主要信息源，对陕北榆林地区乡村聚落的空间分布规律与区位特征进行了探讨。

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