计算机专业基于WebGIS的校园三维电子地图的设计与实现大学毕业论文英文文献翻译及原文.docx
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计算机专业基于WebGIS的校园三维电子地图的设计与实现大学毕业论文英文文献翻译及原文.docx
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计算机专业基于WebGIS的校园三维电子地图的设计与实现大学毕业论文英文文献翻译及原文
毕业设计(论文)
外文文献翻译
文献、资料中文题目:
基于WebGIS的校园三维电子地图的设计与实现
文献、资料英文题目:
文献、资料来源:
文献、资料发表(出版)日期:
院(部):
专业:
计算机
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翻译日期:
2017.02.14
TheDesignandImplementationof3DElectronicMapofCampusBasedonWEBGIS
I.INTRODUCTION
Nowadays,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.FUNCTIONDESIGN
Three-dimensionalelectronicmapsystemofcampusbasedonWEBGIShasgeneralcharacteristicsofthecommonmaps.Throughpressingthearrowkeys(Up,Down,Left,AndRight)onthekeyboard,onecanmakethemapmovetowardsthecorrespondingdirectionoftranslation.Throughdraggingmouse,onecanseewhereverhelikes.Usingthemousewheel,youcancontrolamap'smagnitude,accordingtotheuser'sneedstoviewdifferentlevelsofmap.Thelowerleftofthemapwherewilldisplaythecurrentcoordinateofthemouseonthemap.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.THEPROCESSOFSYSTEMDEVELOPMENT
Tothefirst,wecollecttheinformationwhichcontainstheoutwardappearanceofarchitecturalbuildings,theshapeofthetreesthedesignoftheroads.Andthen,weconstructthreedimensionalsceneswith3DSMAXsoftware[2].Thatistosaywerenderthesceneandachievethehigh-defmitionmap,afterthatwecutthemapintosmallpictureswiththecutfigureprogram,atlastwebuiltthehtmlpageswhichcanasynchronousloadmapsandachievethefunctionoftheelectronicmaps.TheflowchartofthesystemdevelopmentwillbeshowninFigure1:
Figure1systemdevelopmentflowchart
Traditionalmapshavestrictrequirementsonmathematicallaws,mapsymbolsandcartographicgeneralizationwhenindesign.Theproductionofnetworklandscapeelectronicmapalsohasitsowntechnicalstandardswhichissuperiortothetraditionalmap.Thethree-dimensionalelectronicmaphasdifferentzoomlevels;thereforeitneedsnotthestrictscalebuttheunifiedproductionstandards.Mapsymbolusuallyimitatetherealworldasmuchaspossibleandsimplifyitselfatthesametime.Thescopeofthescreenisfargreaterthanthefixedvisionofpaperymaps.Cartographicgeneralizationsthinkmuchofthebalancebetweentheabstractmodelandtheactualperformanceresults.
Asforthedataacquisitionandmanagement,suchastheintroductionandtheinformationusersobtainedfromthemaparefinalresultsofdataacquisition.Inthebeginning,wecollecttheneededdataincludingthename,theaddress,theintroductionandthedigitalphotosofthebuildingsandprepareforthesubsequentthree-dimens
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