摘要
论文回顾了空间数据模型的发展历程 ,从整体上描述了 Arc Info8中 Geodatabase数据模型 ,并详细介绍了模型中对象类、要素类、要素数据集、关系类、域和规则的相关知识。基于笔者对 Geodatabase的认识 ,对 Geodatabase数据模型的优劣作了探讨 ,并针对 Geodatabase的不足 ,在组合关系的约束规则、时空数据的表达、突破图层的概念等方面提出了一些建议 。
This paper reviews the development history of spatial data model, introduces the data model of geodatabase, and explicates the objectClass, feature class, feature dataset, relationship class, domains and rules in the model. Based on the understanding to Geodatabase, the paper discusses the advantages and disadvantages of Geodatabase. In order to make the object oriented spatial model better, this paper gives some advice about restriction rules of compound objects, spatial temporal expression, breakthrough layers, etc.
出处
《地球信息科学》
CSCD
2002年第1期86-90,共5页
Geo-information Science
