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海洋地理信息系统数据库研究.docx

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海洋地理信息系统数据库研究 I.Introduction Withthedevelopmentofmarineexploration,thedemandforoceanographicinformationmanagementhasbecomemoreandmoreurgent.Theapplicationofoceanographicgeographicinformationsystem(GIS)hasbecomeanimportantmethodformarineinformationmanagementandmarineresearch.TheoceanographicGISdatabase,asthecoreoftheoceanographicGISsystem,isresponsibleforstoring,managing,andprocessingvarioustypesofmarinegeographyinformationandprovidingsupportforvariousmarineresearchandmanagementactivities. II.CharacteristicsofOceanographicGeographicInformationSystemDatabase 1.Space-TimeIntegration OneofthemostimportantcharacteristicsoftheoceanographicGISdatabaseistheintegrationofspaceandtime.Theoceanenvironmentchangeswithtime,anddifferentresearchdataarecollectedatdifferenttimes,soitisnecessarytoconsiderthetemporalattributeofthedatawhendesigningthedatabaseforoceanographicGIS. 2.Multi-SourceDataIntegration ThedatasourcesoftheoceanographicGISdatabasearenumerousanddiverse,includinggeology,oceanography,meteorology,biology,andotherfields.Therefore,theoceanographicGISdatabaseshouldbeabletointegratedatafrommultiplesourcesandsupportdataqueriesfromdifferentaspects. 3.DataAccuracyandReliability DataaccuracyandreliabilityarecriticalinoceanographicGISdatabasesbecausedataerrorscanleadtoinaccurateresultsandevenaffectmarineresearchdecisions.Therefore,thedatabasesystemneedstohaveasounderrordetectionandcorrectionmechanismtoensuredataaccuracyandreliability. III.DesignandImplementationofOceanographicGeographicInformationSystemDatabase 1.DataModeling TheprimarystepindesigninganoceanographicGISdatabaseisdatamodeling.Theconceptofdatamodelingistodescribetherealsystemwithamodel.InoceanographicGIS,themodelshouldincludeboththespatialandtemporalfeaturesofthedifferenttypesofmarinedata.Datamodelingisanimportantpartofthedatabasedesignandrequiresclosecollaborationbetweenthedatabasedesignerandmarineresearchexpertstoensurethattheinformationneedsoftheresearcharemet. 2.DatabaseManagementSystem(DBMS)Selection Theselecti