Spatio-temporal GIS Data Model Based on Event Semantics-中国Betway体育网页登陆

摘要 Therearemainlyfourkindsofmodelstorecordanddealwithhistoricalinformation.Bytakingthemasreference,thespatio-temporalmodelbasedoneventsemanticsisproposed.Inthismodel,accordingtothewayfordescribinganevent,alltheinformationaredividedintofivedomains.Thispaperdescribesthemodelbyusingthelandparcelchangeinthecadastralinformationsystem,andexpoundsthemodelbyusingfivetablescorrespondingtothefivedomains.Withtheaidofthismodel,sevenexamplesaregivenonhistoricalquery,tracebackandrecurrence.Thismodelcanbeimplementedeitherintheextendedrelationaldatabaseorintheobject-orienteddatabase.

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Spatio-temporal GIS Data Model Based on Event Semantics

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