摘要
地理要素的分类代码信息通常以主代码和辅代码的不同组合模式来表达。在地理信息数据库(Geodata-base)数据模型中,以国家标准地理信息分类代码体系为基础,在数据字典表中存储地理要素实体的分类与特征属性,利用有效值表将地理要素与其本身的代码信息联系起来。在ArcGIS应用程序平台下实现对地理数据的管理和应用,从而更加详细、准确地表达地理要素的含义。
The classification and codes information of geographic features is usually expressed by different combination patterns of major and minor codes. Based on the classification and codes system of national standard geographic information, the classification and character attributes of geographic entities are stored in data dictionary tables that are contained in Geodatabase. It uses valid value tables （VVT） to connect each geographic feature with its codes information. The AreGIS applications execute the tasks of managing and applying the geographic data to express the meanings of geographic features more particularly and exactly.
出处
《测绘与空间地理信息》
2006年第2期68-70,共3页
Geomatics & Spatial Information Technology
关键词
地理信息分类代码
编码标准
有效值表
数据字典
classification and codes of geographic information
coding standard
valid value table
data dictionary
