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-  2004 

时空数据模型及时空地理信息系统功能架构

Keywords: 时空地理信息系统,时空数据库,时空数据模型

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Abstract:

摘要: 地理信息系统(GIS)就其实质而言,是现实世界的一种数据抽象模型。但现有的GIS数据模型缺乏跟踪现实世界实体变化的能力,因为它只保存实体的现势数据,而对于各种历史状态数据则无法保存,是一种快照数据模型。随着地理信息系统在行业应用的普及和深入,人们开始认识到地理信息系统应该具有描述现实世界中各种时空变化的能力,既可以分析其过去,又可以预测其未来(发展趋势)。这种想法导致了时空地理信息系统和时空数据模型概念的提出。本文分析了时空数据建模方面的技术问题;并讨论了主要的建模方法。认为历史接续关系和时序刻画是时空建模的主要内容。 中图分类号:

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