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1、HTML5GeolocationHTML5GeolocationAnthonyT.HoldenerIIIBeijing•Cambridge•Farnham•Köln•Sebastopol•TokyoHTML5GeolocationbyAnthonyT.HoldenerIIICopyright©2011AnthonyT.Holdener,III.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebast
2、opol,CA95472.O’Reillybooksmaybepurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:(800)998-9938orcorporate@oreilly.com.Editor:SimonSt.Lauren
3、tCoverDesigner:KarenMontgomeryProofreader:O’ReillyProductionServicesInteriorDesigner:DavidFutatoIllustrator:RobertRomanoPrintingHistory:May2011:FirstEdition.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.HTML5Geolocation,theimageofaca
4、pepetrel,andrelatedtradedressaretrade-marksofO’ReillyMedia,Inc.Manyofthedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,Inc.wasawareofatrademarkclaim,thedesignationshavebeenprintedincapsorini
5、tialcaps.Whileeveryprecautionhasbeentakeninthepreparationofthisbook,thepublisherandauthorsassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcon-tainedherein.ISBN:978-1-449-30472-0[LSI]1305652988ToKateandTony:Remembertotaketheroadlesstraveledinlife,a
6、ndbringalongagoodGPSdevicejustincase.TableofContentsPreface.....................................................................xi1.FindingOurWay........................................................1GeolocationinthePast1LocationB.C.E.1TechnologywithExploration2Locationinthe1900s4Public
7、AvailabilityofGPS5GeolocationNow6TheBasics6WaystoLocate7GlobalPositioningSystem(GPS)7IPAddress9GSM/CDMACellIDs10WiFiandBluetoothMACAddress11LocationandLocation-BasedServices(LBS)11GeolocationToday12MobileApplications13AugmentedRealityApplications162.Geolocation:Lati
