摘要
空间数据模型反映现实世界中空间实体及其相互间的联系,但现有G IS数据模型主要表达某一时刻的空间实体及其相互之间的联系,没有考虑表示空间实体的时空变化,本质上是非时态的,无法满足各种用户的需求。本文分析了G IS应用的过程本质,系统地研究了地理信息系统过程建模的概念和类型,讨论了过程模型中的地理时空概念、空间数据模型的研究现状和存在的问题,以空间系统理论为依据,提出了空间数据模型结构,设计了适于表达G IS过程模型的基于框架的时空对象数据模型,并探讨了空间对象的时态表示和处理操作。
Spatial data model can reflect spatial entity and their relations in the real world, but GIS data model in existence can only express that at one moment, it doesnt consider the change of the entities during a period, and it cant satisfy the requirement of consumers. The essence of GIS application is analyzed in this paper. The conceptions and the styles of GIS modeling are studied. Moreover, the status quo and problem of geographical spatio - temporal concept and spatial data model are discussed. Based on the spatial system theory, a spatial data model structure is proposed. And a frame - based spatio - temporal object data model is designed, which is suitable to express GIS procedure model. Finally, the expression and operation method of spatial objects is discussed.
出处
《测绘科学》
CSCD
北大核心
2008年第5期166-168,176,共4页
Science of Surveying and Mapping
