计算机毕业设计外文翻译

（二〇一三年六月本科毕业设计外文文献翻译学校代码：10128学号：200920201076题目：TheDesignandImplementationof3DElectronicMapofCampusBasedonWEBGIS学生姓名：张天佑学院：信息工程学院系别：计算机系专业：计算机科学与技术班级：计算机09-2指导教师：庄旭菲讲师贾然工程师内蒙古工业大学本科毕业设计外文文献翻译1TheDesignandImplementationof3DElectronicMapofCampusBasedonWEBGISI.INTRODUCTIONNowadays,digitalizationandinformatizationarethethemeofourtimes.Withthedevelopmentofinformationrevolutionandcomputerscience,computertechnologyhaspenetratedintoallfieldsofscienceandcausedmanyrevolutionarychangesinthesesubjects,theancientcartographyalsocan'tescape.Withthetechnicalandculturalconstantlyprogress,theformandthecontentofthemapchangeandupdateaswell.Asthecomputergraphics,geographicinformationsystems(GIS)constantlyappliedtotheWeb,theconventionalwayoffabricationanddemonstrationhassufferedgreatchange,andtheapplicationoftheMaphasextendeddramaticallyowingtothedevelopmentofadvancedinformationtechnology.Underthesecircumstances,cartographywillbefacedwithpromisingprospect.Ithasbranchedoutintomanynewproducts.Oneoftheproductscomeintobeingisthee-map[1].Withtherapiddevelopmentofthecomputertechnology,computergraphicstheory,remotesensingtechnology,photogrammetrictechnologyandotherrelatedtechnology.Usersrequirehandlingandanalysisofthree-dimensionvisualization,dynamicinteractivityandshowtheirvariousgeo-relateddata,somuchattentionshouldbepaidtotheresearchofthreedimensionalmaps.ThisarticlebasedontheNortheastPetroleumUniversityanditssurroundingsdesignsandcreatesthethree-dimensionalelectronicmap.II.FUNCTIONDESIGNThree-dimensionalelectronicmapsystemofcampusbasedonWEBGIShasgeneralcharacteristicsofthecommonmaps.Throughpressingthearrowkeys(Up,Down,Left,AndRight)onthekeyboard,onecanmakethemapmovetowardsthecorrespondingdirectionoftranslation.Throughdraggingmouse,onecanseewhereverhelikes.Usingthemousewheel,youcancontrolamap'smagnitude,accordingtotheuser'sneedstoviewdifferentlevelsofmap.Thelowerleftofthemapwherewilldisplaythecurrentcoordinate内蒙古工业大学本科毕业设计外文文献翻译2ofthemouseonthemap.Inadivlayer,wedepictahotspotofnewbuildings,thislayercanbedisplayedaccordingtothedifferentmaplayers,italsocanautomaticallyscale.Byclickingonhotspots,itcanshowthehotspot'sspecificinformation.Onecanalsotypeintothequeryinformationbasedonhisneed,andgetsomerelevantinformation.Inaddition,onecanchoosetocheckthethreedimensionalmapsandsatellitemapsthroughclickingthemouse.Majorfunctions:Userinformationmanagement:Checktheusernameandpassword,setlevelcertificationdependingonthepermissions,allowusersofdifferentpermissionstologinthesystemviatheInternet.TheinquiryofLocationinformation:Systemcanprovideuserswithfuzzyinquiresandquicklocation.Mapmanagement:Implementloadingmaps,mapinquires,layermanagement,andothercommonoperationssuchasdistancemeasurement,andmapszoom,eagleeye,labels,printing,andmore.Roamthemap:Usetheupanddownkeystoroamanyareaofthemap,ordrag-and-dropdirectly.III.THEPROCESSOFSYSTEMDEVELOPMENTTothefirst,wecollecttheinformationwhichcontainstheoutwardappearanceofarchitecturalbuildings,theshapeofthetreesthedesignoftheroads.Andthen,weconstructthreedimensionalsceneswith3DSMAXsoftware[2].Thatistosaywerenderthesceneandachievethehigh-defmitionmap,afterthatwecutthemapintosmallpictureswiththecutfigureprogram,atlastwebuiltthehtmlpageswhichcanasynchronousloadmapsandachievethefunctionoftheelectronicmaps.TheflowchartofthesystemdevelopmentwillbeshowninFigure1:内蒙古工业大学本科毕业设计外文文献翻译3Figure1systemdevelopmentflowchartTraditionalmapshavestrictrequirementsonmathematicallaws,mapsymbolsandcartographicgeneralizationwhenindesign.Theproductionofnetworklandscapeelectronicmapalsohasitsowntechnicalstandardswhichissuperiortothetraditionalmap.Thethree-dimensionalelectronicmaphasdifferentzoomlevels;thereforeitneedsnotthestrictscalebuttheunifiedproductionstandards.Mapsymbolusuallyimitatetherealworldasmuchaspossibleandsimplifyitselfatthesametime.Thescopeofthescreenisfargreaterthanthefixedvisionofpaperymaps.Cartographicgeneralizationsthinkmuchofthebalancebetweentheabstractmodelandtheactualperformanceresults.Asforthedataacquisitionandmanagement,suchastheintroductionandtheinformationusersobtainedfromthemaparefinalresultsofdataacquisition.Inthebeginning,wecollecttheneededdataincludingthename,theaddress,theintroductionandthedigitalphotosofthebuildingsandprepareforthesubsequentthree-dimensionalmodeling.Aftercollectingthedata,weshouldpayattentiontoarchivalandbackupthefilesincaseofloss.Inordertogetthemap,agoodpreparationofthedesignofthestandardsceneisnecessary.Wesettheparameteroftheunderlay,lights,altitudes,rendereffectsandsoon,soastoensurethefinalfruitofoureffortwillhaveauniformeffect.Thespatialentity's内蒙古工业大学本科毕业设计外文文献翻译4performancesusuallyshowupastheformofspot,lineandsurfaceinthethree-dimensionalelectronicmap.Comparedwithvectorgraphics,thegridgraphicshaveunparalleledadvantages.ThecombinationofthegridgraphicsandtheWEBGIS'sbackgroundpublishingtechnologycanimprovetheresponsespeedofsystemandsavesystem'sinputs.SystemachievestheinteractionwiththemapwiththeJavaScriptlanguages.Seeingthatthereliedifferencesinsupportingthescriptinglanguagesonva