云计算环境下空间索引构建研究李振举

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2015-06-055131507011987-、。101416。。MapReduceR28~40R+。RR+P208A1672-5867201510-0013-05SpatialIndexBuiltinCloudComputingEnvironmentLIZhen-juLIXue-junYANGShengLIUTaoDeptofInformationEquipmentAcademyEquipmentofPLABeijing101416ChinaAbstractSpatialdataindexissignificantlyimportantforspatialdatamanagementandanalysiswhichisrelatedwithdataprocessspeedandefficiency.Withthehumansocietyenteringintothebigdataeraremotesensingvectordataisakindofbigdata.Thetra-ditionalspatialindexconstructionmethodisinsufficientforthevectordataprocessing.Thispaperleveragedthecloudcomputingenvi-ronmentforspatialindexconstructionwiththeaimtoimprovetheconstructingspeed.ThepaperatthebeginninggaveareviewonthenormalspatialindexandspatialdatamanagementbasedonMapReducecloudingcomputingmodelthenanalyzedthespatialindexconstructionincloudcomputingtakingtheRtreeindexconstructionasanexample.AtlastanexperimentresultsillustratedthatthespatialindexconstructingspeedissignificantlyimprovedincloudcomputingcomparedwithsinglePCenvironmentandinthesamecloudenvironmentgridfileconstructionspeedishigherthanRtreeandR+treeindex.KeywordscloudcomputingspatialindexbuiltremotesensingvectordataRtreeR+treegridfile0、、。。。、。、。GIS1-3。4GIS。、。3810201510GEOMATICS&SPATIALINFORMATIONTECHNOLOGYVol.38No.10Oct.20151MapReduce。1.1、。。MBGB。TigerOpenStreetMapTigerTigerArealandmarkarealm、AreaHydrographyareawater、AllEdgesCombinededges、LinearHydrographylinearwater、PrimaryRoadsprimaryroads55-DigitZIPCodeTabulationAreazcta510。OpenStreetMapAllPointsontheplanetAllNodes、AllextractedmapobjectAllObjects、BoundariesofallbuildingBuildings、BoundariesofcemeteryCemetery、BoundariesofparksorgreenareasParks、BoundariesofparksorgreenareasParks、BoundariesofpostalcodeareasPostalcodesRoadnetwork、BoundariesofsportingareasSportsRoadnetworkrepresentedasindi-vidualroadsegementsRoads。12012Ti-gerOpenStreetMap。1Fig.1Remotesensingvectordata114500G。2Ti-gerOpenStreetMap。2Fig.2Numberofremotesensingvectordata2。1.2。、RR+5。。RB。RB+。R、。R。6。R+RR“”R+。3。1.3MapReduceMapReduce7。、。MapReduceMap、Reduce、Shuffle、Merge。44120153Fig.3Spatialdatadistributionisnotuniform.MapReduce。4MapReduceFig.4MapReducestagedivisionMapMapReduceReduceMap。MapkeyReducer。Mapkeyivalue()i→listkeymvalue()mReducelistkeymvalue()m→keyovalue()oMapReduceMapReduceMapReduce。、。8MapReduceR-k-。CG_Hadoop9MapReduce、、、。HydroCloud。SpatialHadoop10。Hadoop、、Ma-pReduce。HadoopGIS11Hadoop。MNTG12。100GB。R+。TAREEG13OpenStreetMapMNTGGoogleKMLESRI。MapReduceOpenStreetMap。Pigeon。R+。SHAHED14NASANASA。SHA-HED。。。2。2.1RR。R。Hadoop。Ma-pReduceR3。1。R。Map15ReduceMapR-1R5。2。R16R。MapReduce1Map()fxReduceR。MBR。3。2RHadoop6。2.2R+。MapReduceR51105Fig.5Spaceobjectblockcalculationstep6RFig.6MergeandgeneratethefinalRtree31。R+。R+R。R+。R+3R1R+。33.1HadoopVirualBox3Hadoop。Ubuntu10.04LTS1024MB64MB。。csv。MapReduce。3.2Hadoop。Hadoop31232、62464、93696、124928、156160。。1R78。7HadoopRFig.7RindexconstructiontimecomparisonbetweensinglemachineandHadoopcluster8RFig.8ConstructionofRindexfordifferentspaceobjectsHadoop28~45R。2Hadoop、RR+9。9HadoopFig.9IndexconstructiontimeofdifferentspaceobjectsinHadoopcluster9612015GridRR+。4、。。HadoopMapReduce。RR+。。1.J.201329425-29.2MadduriKBaderDABerryJWetal.Parallelshor-testpathalgorithmsforsolvinglarge-scaleinstancesC.9thDIMACSImplementationChallenge———TheShortestPathProblemNewJerseyUSARutgersUni-versity20061-39.3WaughTCHopkinsS.AnalgorithmforpolygonoverlayusingcooperativeparallelprocessingJ.InternationalJournalofGeographicalInformationScience199266457-467.4.J.2013362209-225.5.J.2003201212-14.6.M.2009.7DeanJGhemawatS.MapReducesimplifieddatapro-cessingonlargeclustersJ.CommunicationsoftheACM2008511107-113.8.MapReduceR-k-J.20132481836-1851.9EldawyALiYMokbelMFetal.CG_Hadoopcom-putationalgeometryinMapReduceC.Proceedingsofthe21stACMSIGSPATIALInternationalConferenceonAdvancesinGeographicInformationSystemsOrlandoFLUSAACM2013294-303.10EldawyAMokbelMF.SpatialHadoopAMapReduceFrameworkforSpatialDataC.IEEEInternationalCon-ferenceonDataEngineeringICDE2015SeoulSouthKoreaIEEE2015.11AjiAWangFVoHetal.Hadoopgisahighper-formancespatialdatawarehousingsystemovermapreduceC.ProceedingsoftheVLDBEndowmentTrentoIta-lyVeryLargeDatabaseEndowment20131009-1020.12MokbelMFAlarabiLBaoJetal.MNTGanextensi-bleweb-basedtrafficgeneratorM.Springer2013.13AlarabiLEldawyAAlghamdiRetal.TAREEGaMapReduce-basedwebserviceforextractingspatialdatafromOpenStreetMapC.Proceedingsofthe2014ACMSIGMODinternationalconferenceonManagementofdataNewYorkNYUSAACM897-900.14EldawyAMokbelMFAlharthiSetal.SHAHEDAMapReduce-basedSystemforQueryingandVisualizingSpatio-temporalSatelliteDataC.InternationalConfer-enceonDataEngineeringICDE2015SeoulSouthKo-reaIEEE2015.15CaryASunZHristidisVetal.Experiencesonpro-cessingspatialdatawithmapreduceC.ScientificandStatisticalDatabaseManagementNewOrleansLAUSASpringer2009302-319.16LiuYJingNChenLetal.Parallelbulk-loadingofspatialdatawithMapReduceAnR-treecaseJ.Wu-hanUniversityJournalofNaturalSciences2011166513-519.121.ArcGISEngineJ.2010296866-869.2.ArcGISJ.2010458-60.3.J.2009313-15.4.ArcGISJ.2011203145-150.5.GISJ.201447448-53.6.SketchUpArcGISJ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