文献类型：会议论文

英文题名：On the Impact of Granularity of Time to Linear Topological Relations between Geographical Events and Their Formalization

作者：Liu, Kai[1,2];Long, Yi[3];Yang, Huimin[2];Qin, Yaochen[1]

第一作者：Liu, Kai;刘凯

通讯作者：Liu, K[1]

机构：[1]Henan Univ, Minist Educ, Key Lab Geospatial Technol Middleand Lower Yellow, Kaifeng, Peoples R China;[2]Henan Univ Econ & Law, Res Ctr Regional Sustainable Dev, Sch Resources & Environm Sci, Zhengzhou, Peoples R China;[3]Nanjing Normal Univ, Sch Geog Sci, Nanjing, Jiangsu, Peoples R China

第一机构：Henan Univ, Minist Educ, Key Lab Geospatial Technol Middleand Lower Yellow, Kaifeng, Peoples R China

通讯机构：[1]corresponding author), Henan Univ, Minist Educ, Key Lab Geospatial Technol Middleand Lower Yellow, Kaifeng, Peoples R China.

会议论文集：21st International Conference on Geoinformatics (Geoinformatics)

会议日期：JUN 20-22, 2013

会议地点：Kai Feng, PEOPLES R CHINA

语种：英文

外文关键词：geographical event; granularityof time; scale transformation; temporal relations

摘要：The time scale is an important element of spatial-temporal data model thatdetermines the level of detail to characterize and describe the geographic information. In spatial-temporal databases, time granularity has a decisive impact on the topological spatial-temporal relationship of geographical objects. In this paper, at first a formal definition of basic elements of time has been put forward. Then based on set theory, the number axes can be divided into three parts according to the number of time of geographical event. Based on the intersection of the sets of two-time elements a formal description of the 9 intersection model of the linear time topological relationships between geographical events has been established. On this basis, the impacts of time granularity to topological relationships of linear time between geographic events also has been discussed with a case study.