| 基于事件-状态的地理时空数据模型研究 |
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| 引用本文： | 张运,冯学智,佘江峰.基于事件-状态的地理时空数据模型研究[J].测绘与空间地理信息,2009,32(6):5-8. |
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| 作者姓名： | 张运 冯学智 佘江峰 |
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| 作者单位： | 1. 安徽师范大学国土资源与旅游学院安徽省自然灾害过程与防控重点实验室,安徽,芜湖,241000
2. 南京大学地理信息科学系,江苏,南京,200093 |
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| 基金项目： | 高等学校博士点学科基金 |
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| 摘 要： | 分析了事件与状态的关系,对基态修正模型加以改进,根据事件发生的频繁程度及每次数据量更新的大小,建立历史基态,对于历史基态间的地理实体数据只记录其相对于历史基态的变化部分.既克服了基于快照时空数据模型产生的大量冗余数据,又克服了基态修正模型随着修正次数的增加,历史重构需要大量的复杂计算的缺陷,具有历史数据恢复快的优势.
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| 关 键 词： | 时态地理信息系统 时空数据模型 事件 基态 |
An Event-state Oriented Spatio-temporal Data Model |
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| ZHAGN Yun,FENG Xue-zhi,SHE Jiang-feng.An Event-state Oriented Spatio-temporal Data Model[J].Geomatics & Spatial Information Technology,2009,32(6):5-8. |
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| Authors: | ZHAGN Yun FENG Xue-zhi SHE Jiang-feng |
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| Institution: | ZHAGN Yun1,FENG Xue-zhi2,SHE Jiang-feng2(1.The Provincial Key Laboratory of Research on Processes and Emergency Management of Disaster in Anhui Province,College of Territorial Resources and Tourism,Anhui Normal University,Wuhu 241000,China,2.Department of Geographic Information Science,Nanjing University,Nanjing 200093,China) |
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| Abstract: | The relations between entities events and its states were analyzed,and an improvement on base state with amendments model were made.The key idea of this model is to build historical base states and events according to the frequency of event happened and the amount of data updates.It overcomes the weakness of snapshot model which leads a great deal of redundant data,and also overcomes the drawback of base state with amendments model which will need a great amount of complex computation when historical state ... |
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| Keywords: | temporal GIS spatio-temporal data model event base state |
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