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谷歌中国地图 时间:2021-05-21 阅读:()
PublishingDWGDatatoGoogleEarthThomasInzinga–AutodeskGD405-1Aftercompletingthissession,youwillbeabletoimportimageandterraindataintoAutoCAD-basedproducts,usethatdatatohelpwithvariousdesignandmodelingtasks,andpublishDWG-basedmodelstoGoogleEarthforpresentationtowideraudiences.
YouwillalsogainanunderstandingforthecontextinwhichGoogleEarthdatashouldbeused,andforthevariousoptionsavailableforpublishingDWGdatatoGoogleEarth,includingtemporaldata.
AbouttheSpeaker:TomisasoftwarearchitectfortheAutodeskAECDivision.
With23yearsofexperience,heisanexpertinthedesign,development,andimplementationofcivil-engineeringapplications.
Forthepast9years,TomhashelpedarchitectCivil3DintotheleadingAutoCAD-basedcivilengineeringapplication.
Hehasdegreesinmapping,andcivilengineeringandsurveying.
HismostrecentsideprojectatAutodeskhasbeentheimplementationoftheDWGpublishingextensionforGoogleEarth,availableontheAutodesklabssiteandwithinCivil3D.
PublishingDWGDataToGoogleEarthIntroductionThisclassprovidesinformationonthetwo-wayexchangeofdatabetweenAutoCAD(andAutoCAD-basedverticals)andGoogleEarth.
Thisexchangeofdatacanhelpyouinnumerouswaysinyourday-to-daydesignandengineeringresponsibilities.
Severalscenarioswherethisdataexchangemightbeusefulincludes:ImportimageryfromGoogleEarthforuseasadesignbackdrop.
ImportelevationreliefdataintoAutoCADtohelpdepictas-builtandproposedbuildingdesignsrelativetothesurfaceterrain.
PublishmapparcelinformationtoGoogleEarthasameansofdisseminatingcadastralinformation.
PublishfromAutoCADtoGoogleEarthtemporaldataforaphasedconstructionprojectthatcanusedbypublicagenciestodepicthowtheprojectwillimpactresidents.
WheretofindtheSoftwareDescribedinthisClassTheAutoCADGoogleEarthpublishingextensiontoolisavailableforfreeatAutodesk'slabswebsite,http://labs.
autodesk.
com.
Furthermore,AutoCADCivil3D2008includesmostofthefunctionalitydescribedhere-in.
UnderstandingGoogleEarth'sUserInterfaceThisclassutilizesseveralfeatureswithinGoogleEarthextensively.
Therearenumerouson-lineguidestousingGoogleEarth.
Fourthatarehighlyrecommendedare:GoogleEarthUserGuide:http://earth.
google.
com/userguide/v4/GoogleEarthBlog:http://www.
gearthblog.
com/basics.
htmlJuicyGeography'sGEBlog:http://www.
juicygeography.
co.
uk/blog/page_id=5GoogleEarthTimelines:http://earth.
google.
com/userguide/v4/ug_gps.
html#timeline-2-PublishingDWGDataToGoogleEarthImportImagefromGoogleEarthTopublishAutoCADmodelstoGoogleEarth,youmustfirstbeabletodefinethelocationofwherethemodelsaretobelocatedontheEarth'ssurface.
ThiscorrelationofAutoCADmodelspacecoordinatestoGoogleEarthlatitudeandlongitudecoordinatesisreferredtoageo-referencing.
Asimplemethodofgeo-referencingAutoCADmodelspacedataistoimportanimagefromGoogleEarthandpositiontheimageproperlyrelativetoyourmodeldata.
Additionally,youcanusetheimportedimageasabackdropfordesign.
Priortoimportingtheimageyoushouldcompletethefollowingsteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttocapturetheimage.
ZoomincloseenoughtocapturetheappropriatelevelofdetailoftheEarth'ssurfaceintheareaofinterest.
BesureyouarelookingstraightdownattheEarth'ssurface(thatis,theviewdoesnothaveanytilt.
)YoucanremovealltiltfromthecurrentGoogleEarthviewbypressingthe'u'key.
Generally,itisbesttokeeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthapplicationwindow.
NowyouarereadytobringanimageoftheGoogleEarthviewintoAutoCAD.
TheImportGEImagecommandisusedtoimportanimagefromGoogleEarth.
Afterselectingthecommand,therewillbeabriefpausewhiletheimageisobtainedfromGoogleEarth.
Then,arectanglerepresentingtheborderoftheimagewillbeattachedtotheAutoCADgraphicscursor.
Positiontheimagetothedesiredlocation,andthenspecifyarotationangletoorienttheimageasdesired,orIfAutoCADCivil3D2008orAutoCADMap3D2008isbeingused,andamapprojectionhasbeendefined,youcanselecttheoptionatthecommandprompttopositiontheimageautomaticallyusingthemapprojectioncoordinateconversionalgorithms.
Notethefollowingitemsabouttheimageimportprocess:Onceplaced,youmayuseAutoCAD'smoveandrotatecommandstofurtherrefinethepositionoftheimagerelativetoyourmodel.
DonotadjustthepositionofyourDWGmodel.
Rather,adjustthepositionoftheimagerelativetoyourmodel.
-3-PublishingDWGDataToGoogleEarthThedimensionsoftheimageinthedrawingaredefinedbytheextentoflongitudeandlatitudetheimagecoversinGoogleEarthandatransformationofthoseextentstothelinearunitsdefinedbytheINSUNITSsystemvariableinAutoCAD.
IfamapprojectionisactivewithinCivil3DorMap3D,onlythecenterpointoftheimageisplacedusingthemapprojectiontransformalgorithms.
Theextentsoftheimagearestilldefinedasinthepreviousitem.
TheimagedisplayedinthedrawingisanAcDbRasterImage,andisstoredinthesamefolderastheDWGfile.
ThefirstthreelettersoftheimagefilenamewillbethesameasthefirstthreelettersoftheDWGfile,andthefileextensionwillbeJPG.
Theimageentityhasx-dataattachedthatcontainsinformationaboutwhereontheEarth'ssurfacetheimagecovers.
Thisx-dataisusedtoproperlygeo-referencethemodelspacecoordinateswiththeGoogleEarthcoordinates.
TheimagebroughtintoAutoCADusingthiscommandwillonlybeblackandwhite,eventhoughtheimageinGoogleEarthisincolor.
ThisisalimitationimposedbyGooglewhenusingtheGoogleEarthapplicationprogramminginterface(API).
Thereisnowaytochangethis.
However,seethenextsectionforamethodtomanuallyimportacolorimage.
HereisanexampleofanimageoftheVenetianHotelimportedtoAutoCADfromGoogleEarth.
-4-PublishingDWGDataToGoogleEarthImportColorImagefromGoogleEarthAlthoughitisnotpossibletoimportacolorGoogleEarthimageautomatically,itisnever-the-lesspossibletodisplaycolorimagesinAutoCAD.
Priortoimportingtheimageyoushouldcompletethefollowingsteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttocapturetheimage.
ZoomincloseenoughtocapturetheappropriatelevelofdetailoftheEarth'ssurfaceintheareaofinterest.
Generally,itisalsobesttokeeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthapplicationwindow.
Next,fromwithinGoogleEarth,usetheFile>Save>SaveImage…commandtosavethecurrentGoogleEarthviewasaJPGimagefile.
Finally,fromwithinAutoCAD,usetheImageAttachcommandtoimporttheimageintotheAutoCADdrawing.
Notethefollowingitemsaboutthecolorimageimportprocess:Onceplaced,youmayuseAutoCAD'smove,rotate,andstretchcommandstofurtherrefinethepositionoftheimagerelativetoyourmodel.
TheimageisdisplayedinthedrawingisanAcDbRasterImage.
HereisacolorimageofNiagaraFallsimportedintoAutoCADfromGoogleEarth.
-5-PublishingDWGDataToGoogleEarthImportGoogleEarthTerrainasAutoCADMeshYoucanimporttheelevationdataforthecurrentGoogleEarthviewintoAutoCADasamesh.
AnewmaterialisalsocreatedinthecurrentdrawingfilefromanimagecreatedusingtheGoogleEarthview.
Thenewmaterialisassignedtothenewlycreatedmesh.
WiththerealisticshademodeforanAutoCADviewportturnedon,theimagewillappeardrapedonthenewlycreatedmesh.
Priortoimportingtheterraindataasamesh,youshouldcompletethefollowingsteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttoimporttheelevationdata.
EnsuretheTerrainlayerinGoogleEarthistoggleon.
BesureyouarelookingstraightdownattheEarth'ssurface.
(Thatis,theviewdoesnothaveanytilt.
)YoucanremovealltiltfromthecurrentGoogleEarthviewbypressingthe'u'key.
Also,forbestresults,zoomincloseenoughtocaptureenoughdetailoftheEarth'ssurfaceintheareaofinterest.
Lastly,keeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthwindow.
NowyouarereadytobringameshoftheGoogleEarthterrainintoAutoCAD.
TheImportGEMeshcommandisusedtocollectthemeshdata.
Afterabriefperiod,ameshrepresentingtheterraindatawillbeattachedtotheAutoCADgraphicscursor.
Positionthemeshtothedesiredlocation,andthenspecifyarotationangletoorientthemeshasdesired.
IfAutoCADCivil3D2008orAutoCADMap3D2008isbeingused,andamapprojectionhasbeendefined,youcanselecttheoptionatthecommandprompttopositionthemeshautomaticallyusingthemapprojectioncoordinateconversionalgorithms.
Notethefollowingitemsabouttheimportmeshprocess:Onceplaced,youmayuseAutoCAD'smoveandrotatecommandstofurtherrefinethepositionofthemeshrelativetoyourmodel.
DonotadjustthepositionofyourDWGmodel.
Rather,adjustthepositionofthemeshrelativetoyourothermodelspacedata.
-6-PublishingDWGDataToGoogleEarthThedimensionsofthemeshinthedrawingaredefinedbytheextentoflongitudeandlatitudethemeshcoversinGoogleEarth,andatransformationofthoseextentstothelinearunitsdefinedbytheAutoCADINSUNITSsystemvariable.
ThemeshisdisplayedinthedrawingasanAcDbPolygonMeshobject,andisoftypesimplemesh.
Themeshsizeisfixedat32rowsby32columns.
TheimagecapturedfromtheGoogleEarthviewissavedinthesamefolderasthedrawingfile,hasthesamethree-letterprefixasthefirstthreelettersinthedrawingfilename,andhasaJPGextension.
Thematerialcreatedinthedrawingisnamedusingthefirstthreelettersofthedrawingfile,followedbyseveralrandomnumbers.
ThematerialcreatedfromtheimagebroughtintoAutoCADusingthiscommandwillonlybeblackandwhite,eventhoughtheimageinGoogleEarthisincolor.
ThisisalimitationimposedbyGooglewhenusingtheGoogleEarthapplicationprogramminginterface(API).
Thereisnowaytochangethis.
However,seethenextsectionforamethodtomanuallydrapeacolorimageontothemesh.
HereistheMatterhornareaintheEuropeanAlpsimportedasameshwithamaterial.
-7-PublishingDWGDataToGoogleEarthImportColorGoogleEarthImageasAutoCADMaterialYoucancreateAutoCADmaterialsfromimagessavedfromGoogleEarth.
ThesematerialscanthenbeappliedtoAutoCADentities.
Priortocreatingthematerialyoushouldcompletethefollowing:StartGoogleEarth,andzoomtothelocationontheEarth'sZoomincloseenoughtocapturetheappropriatelevelofGenerally,itisalsobesttokeeptheGoogleEarthNext,fromwithinGoogleEarth,usetheSaveImage…commandtosurfacewhereyouwanttocapturetheimage.
detailoftheEarth'ssurfaceintheareaofinterest.
applicationwindowmaximized.
savethecurrentGoogleEarthviewasaJPGimagefile.
NowyouarereadytocreatetheneAutoCADmaterial.
FromwithinAutoCAD,createanewmaterialusingthetheUsesettingssimilartothoseshowninthedialogalongtheAttachthenewmaterialtoanyappropriateAutoCADentity,Usingthematerialmapcommand,selectthePlanaroptionFinally,changetotherealisticvisualstyleusingtheshademodecommand,andthecolorimageshouldappearontheentityasamaterial.
wmaterialscommand.
AssociatethesavedJPGimagetonewmaterial'sdiffusetexturemap.
rightsideofthispage,especiallysettheMaterialScalingandTilingandMaterialOffsetandPreviewvaluesasshown.
suchasameshobjectasimportedintheprevioustopic.
andapplyittotheAutoCADentity.
-8-PublishingDWGDataToGoogleEarthImportGoogleEarthTerrainasAutoCADCivil3D2008TerrainModelUsersofAutoCADCivil3D2008canimportterrainmodeldatafromGoogleEarthdirectlyintoaCivil3Dsurfaceobject.
Thesubsequentsurfaceobjectcanthenbevisualizedwithmorethantendifferentstyles.
ToimportterraindatatoaCivil3D2008surfaceobject,followthesesteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttocapturetheterrain.
EnsurethatyouarelookingstraightdownattheEarth'ssurface.
ZoomincloseenoughtocapturetheappropriatelevelofdetailoftheEarth'ssurfaceintheareaofinterest.
EnsuretheTerrainlayerwithinGoogleEarthistoggledon.
Generally,itisalsobesttokeeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthapplicationwindow.
FromwithinCivil3D,usetheImportGESurfacecommandtocollecttheterraindatafromGoogleEarth.
Ifnomapprojectionisdefined,thenspecifytheoriginandrotationofthesurfacedata.
Withamapprojectiondefined,youcanhaveCivil3DautomaticallytransformtheGoogleEarthlongitudeandlatitudecoordinatestotheAutoCADworldcoordinates.
Finally,specifythename,description,anddisplaystyleofthenewsurface.
Notethesurfacedataisimportedasamatrixofpoints.
YoucanspecifythenumberofpointsinthematrixusingCivil3D'sSettings>Surface>Commands>ImportGESurface>GoogleEarthOptions>RowsandColumnssettings.
Thedefaultis100rowsand100columns,foratotalof10,000pointsresultinginapproximately20,000triangles.
HereisanexampleofterraindataimportedintoCivil3Danddisplayedseveraldifferentways.
-9-PublishingDWGDataToGoogleEarthMapProjectionsNumerousbookshavebeenwrittenontechniquestomapitemsontheEarth'scurvedsurfacetoplanarsurfaces.
Wewillnotdelveintomuchdetailhereotherthantonotethefollowingitems:TheinternalcoordinatesystemofGoogleEarthisgeographiccoordinateseWhennomapprojectionhasbeendefined,anapproximateformulaisusedtoconverts.
andaformalmapprojectionhasbeendefinedusingcommandsavailablewithinthoseformationsoverlarger(latitude/longitude)ontheWorldGeodeticSystemof1984(WGS84)datum.
AutoCADdoesnothavetheinherentnotionofdistancelinearcoordinates,sothevaluoftheAutoCADinsertionscale,INSUNITS,systemvariableisused.
Usetheddunitscommandtosetthatvalue.
betweentheGoogleEarthandAutoCADcoordinatesystemThisapproximatecoordinatetransformationmethodissuitablewhenworkingwithlocalizedareassuchasbuildingsitesandthelike.
WhenusingthepublishingtoolwithAutoCADCivil3D2008orAutoCADMap3D2008,products,amuchmorerigoroussetofformulaeareusedtoconvertbetweenthetwocoordinatesystems.
Thesemorepreciseconversionmethodsprovidesuitabletransdistancesandareas.
-10-PublishingDWGDataToGoogleEarthPublishingAutoCADModelSpaceEntitiestoGoogleEarthTopublishmodelspacedatatoGoogleEarth,usethePublishKMLcommand.
PriortopublishingdatatoGoogleEarth,youshouldknowthepositionofwherethemodelwillbeplacedontheEarthistousetheproceduredescribedintheand,youwillbepresentedwithasixstepseriesofdialogs,orWizard,3:Optionalvaluespecifyingthehyperlinktobeappliedhouldalsobeprovided.
:SpecifiesthatallmodelspaceentitiesshouldbeGoogleEarth.
selectionof7:Iftoggledpublishedaentities(for9:Includesinthepublishedfile.
theEarth'ssurface.
Thesimplestmethodtogeo-referencetheDWGmodelspacedatawithalocationonsectionImportImagefromGoogleEarth.
AfteractivatingthePublishKmlcommwalkingyouthroughtheprocessofpublishingthedata.
ThefollowingparagraphsaredescriptionsforeachiteminthepublishingWizard.
1:RequiredvaluespecifyingthenameoftheDWGmodelasdisplayedintheGoogleEarthPlacespanel.
2:OptionalvaluespecifyingthedescriptionoftheDWGmodelasdisplayedintheGoogleEarthPlacespanel.
tothefullDescriptiontextstring.
Ifthisvalueisspecified,thenaDescriptions4published.
5:Allowsyoutoselectspecificentitiesforpublishingto6:Temporarilyhidesthepublishingwizardandallowsmodelspaceentitiesforpublishing.
on,textstringsinthedrawingwillbesGoogleEarthnamedplacemarks.
8:PublishesadditionaltextualinformationaboutDWGusewithAutoCADCivil3D,AutoCADMap3D,orAutoCADArchitectureonly.
)anymaterialsattachedtoAutoCADentities-11-PublishingDWGDataToGoogleEarthPublishingDWGDataToGoogleEarth-12-10:SpecifiesthatthemapprojectiondefinedinthedrawingshouldbeusedtotransfAutoCADcoordinatestoGoogleEarthcoordinates.
(ForusewithAutoCADCivil3D2heDWGmodeldataontheEarth'ssurface.
ctionoflocationfor13.
th.
gAutoCAD'sGeographicLocationdialog.
intheNorth/SouthorEast/Westdirections.
SpecifytheGoogleEarth.
ormfrom008andAutoCADMap3D2008only.
)11:Specifiesthatauser-definedtransformbetweendrawingcoordinatesandGoogleEarthcoordinatesisusedtotransformthedrawingdata.
12:CollectslocationinformationfromanimportedGoogleEarthimagetoassistinpositioningt13:DefinesthelocationintheDWGmodelspacethatisgeo-referencedtoaspecificlocationontheEarth'ssurface.
14:Allowsinteractivesele15:DefinesthelocationontheEarth'ssurfacethatisgeo-referencedtoaspecificlocationintheDWGmodelspace.
16:AllowsapproximatedefinitionofageographiclocationusingAutoCAD'sGeographicLocationdialog.
17:Definestherotation(ifany)ofthepositiveY-axisforAutoCADmodelspacetotheNorthdirectioninGoogleEar18:AllowsapproximatedefinitionoftheY-axisorientationusin19:DefinesanamounttooffsettheDWGmodelvalueinthesameunitsasdefinedbytheAutoCADINSUNITSsystemvariable.
20:DefinesanamounttooffsettheelevationoraltitudeoftheDWGmodeldata.
UsethisvaluetofinetunethepositionofthemodelinSpecifythevalueinthesameunitsasdefinedbytheAutoCADINSUNITSsystemvariable.
-12-PublishingDWGDataToGoogleEarth21:ControlshowthemodelspaceZ-coordinateofentitiesismappedtoelevationsinGoogleEarth.
YoucanspecifythatmodelspaceZ-coordinatesare:Relativeelevations:addedorsubtractedtotheeubtratitidatafilensisingtheKMZextension.
NoteextensionofKMZwillalwaysbeused.
23:Initiatesthepublishingprocessandcreatesthedatafile.
nd.
ft)plevationoftheEarth'ssurfaceinthectedtothesealevelheight.
es,andusestheelevationofthegroundforuseinGoogleEarth.
ExtensionsofKMZdbyGoogleEarth.
PublishedDWGonisused.
Alargereductioninfilesizethatwhenpublishingmaterials(item9)anzoomstotheareawherethepublishedublishedtoGoogleEarth(right).
areawherethemodelisbeingpublished.
Absoluteelevations:addedorsDrape:IgnorestheZ-coordinatevalueofenwheretheentityislocated.
22:Definesthefilenameofthepublished(compressed)andKML(uncompressed)arebothrecognizemodelscanresultinlargedatafilesiftheKMLextewilloccurwhenu24:OpensthepublisheddatafileinGoogleEarth,adataislocatedHereisanexampleofAutoCADbuildingmodel(le-13-PublishingDWGDataToGoogleEarthThefollowingitemsareimportanttonoteaboutthepublishingprocess:Publishedmodelscanbesharedwithothersbysimplysharingthepublisheddatafile.
oogle's3DWarehouselocatedathttp://sketchup.
google.
com/3dwarehouse/upload_detailswebupload=true&uptyp=mnYoucansharemodelswithothersusingG.
DWGmodeldataisgroupedundertheModelfolderintheGoogleEarthPlacespane.
pedintheCamerasandPathsfoldersinthePlacespane.
fined,thedefaultbehavioristoautomaticallyusetheingcoordinatestoGoogleEartheEarth,eaccurateconversionispossibleiftheautomaticmapprojectiontransformationisused(ifoneisavailable).
Whenpublishingmaterials(item9),GoogleEarthlimitsthemodelsizeto21845d.
Ifyourmodelislargerthanthis,publishthewillalwayshaveaKMZextension.
einformationassociatedCamerasandpathsaregrouColorsofpublishedentitiesinGoogleEartharecloselymatchedtoAutoCADcolors.
Onlymodelspacedatamaybepublished.
WhenusingthepublishingtoolwithinAutoCADCivil3D2008orAutoCADMap3D2008,andamapprojectionisdemapprojectionformulae(item10)toconvertfromdrawcoordinates.
YoucanoptionallymanuallydefinetheAutoCADtoGooglcoordinatetransformationontheGeo-Referencepageofthepublishingwizard(item11)butamortriangleswhenmaterialsareincludemodelseveraltimesinsmallerpartitions.
Whenpublishingmaterials(item9),thedatafileWhenpublishingEntityInformation(item8),additionalattributwiththeentitiesisviewableinGoogleEarthpane.
Apop-upwindowanchoredontheentityintheGoogleEarthviewwilllisttheattributedata.
TheattributeinformationpublishbyclickingontheModeliteminthePlacesedvariesbyproduct:AutoCADProductEntityAttributeInformationPublishedAutoCAD2008None.
Civil3D2008Predefinedsetofattributesthatvariesbyentitytype.
Map3D2008Predefinedsetofattributesthatvariesbyfeaturetype.
Architecture2008UtilizesPropertySetdata.
onSeeAutoCADArchitecture2008helpforinformationattachingPropertySetdatatoentities.
-14-PublishingDWGDataToGoogleEarthIncludingTemporalInformationwithPublishingEntitiesGoogleEarthprovidestheabilitytoconditionallydisplaypublishedmodeldatabasedonstartandeferredtoasaeoveraIfyoupublishedtoGoogleEarth,youcanusethetimelinetoolwithinthatapplicationtocontrolthedisyPriootechniquetoassociatetimewiththevariousentities.
Thiswillvaryfrommodeltomodel.
ForexalassociateonetimespanwiththefirstfloorcolnwouaToattaGETimAfteraoneorpanforGoogleEarthdialogappears.
Definethe(optional)starttimeandpAfterthshedtoGoogleEarth,usetheTimelineslidercontroltodisplayyourmoFeare1:Click2:Dragdatadisplayed.
yananimationofthovetherangewholeset.
4:Clickthistosetoptionsforthemovethetimerendtimesattachedtoeachpieceofmodeldata.
Thesestartandendtimesarernntity'stimespan.
Thisisausefultoolwhereyouneedtopresentdevelopmentprogressperiodoftime.
AttachingtimespaninformationtoAutoCADentitiesisentirelyoptional.
decidetoattachstartandendtimestoAutoCADmodelspaceentitieswhenthemodelisplaofthemodeldata.
rtattachingtimeinformation,youshouldanalyzeyourmodelanddecideonthebestmpe,forastructuralframingmodel,youmightums,asecondtimespanwiththesecondfloorbeams,andsoon.
Usingthistechniqueldllowyoutoanimatetheupwardconstructionofthebuildingframing.
chtimespaninformationtoAutoCADentitiespriortopublishingthedatausetheecommand.
ctivatingthecommand,youwillbepromptedtoselectmoremodelspaceentities.
Then,theTimes(otional)endtimefortheselectedentities.
eAutoCADmodelspaceentitiesarepublideldataoverthedefinedtimeperiod.
tusoftheTimelinesliderinclude:thesearrowstomovethetimerangeearlierorlater.
theserangemarkerstotherightorlefttore-definethetimerangeof3:Clickthistoplaesequence.
Thisworksbestifyoummarkerstodefineatimerangesmallerthanthetimeslider.
5:Dragthistoangeearlierorlater.
-15-PublishingDWGDataToGoogleEarthNotethefollowingimportantpointsrelatedtoattachingtimeinformationtomodearetioncanbeached,atooupdalspaceentities:Ifastarttimeisnotattachedtoanentity,thentheentitywilldisplaystartingatthebeginningofthetimeslidertoolinGoogleEarth.
Similarly,ifanendtimeisnotattachedtoanentity,thentheentitywilldisplayfromthestarttimethroughtotheendofthesliderbar.
AnentitywithoutanytimespaninformationattachedtoitwillalwaysbedisplayedinGoogleEarth.
TimeinformationassociatedwithAutoCADmodelspaceentitiesisattachedtothoseentitiesusingX-Data.
Timespaninformationattachedtoentitiesinmodelsisnotpublishedwhenmaterialspublished;eithertimeinformationcanbepublishedormaterialinformapublished,butnotboth.
IfyouhoveroveranentitywithtimespandataattltipwiththestartandendtedbyrerunningtheGETimetimeswillbedisplayed.
Existingtimespandataattachedtoanentitycanbecommandontheentity.
-16-PublishingDWGDataToGoogleEarthComparisonofVariousAutodeskProductsthatInteractwithGoogleEarthThispresentationhasconcentratedonAutoCADandtheAutoCAD-basedverticalapplicatinteractionwithGoogleEarth.
Autodesk'sRevitArchitecionstureandMapGuideproductsalsocanaexchangethatcancurrentlyoccuralsosenddatatoGoogleEarth.
ThefollowingtabledelineatesthevarioustypesofdatbetweenAutodeskproductsandGoogleEarth.
2008ProductImportGEImageImportGEMeshImportGETerrainModelGETimeSupportsPublishtoMapGEProjectionsAutoCAD9999AutoCADCivil3D999999AutoCADMap3D99999AutoCADArchitecture9999MapGuide99RevitArchitecture99-17-PublishingDWGDataToGoogleEarth-18-AccuracyofGoogleEarthDataGoogleEarthhasdigitalelevationmodel(DEM)datacollectedbyNASA'sShuttleRadarTopographymission.
InGoogleEarth,theresolutionofthecellsofthesourcedataisapproximately30metersoverUnitedStatesterritory;fortherestoftheworld,only90meterspacinghasbeenmadeavailable.
GoogleEarthhasimprovedtheirresultsusingaspecializedominentmountains,havebeenimprovedbytheentaryDEMdatatofillthegapsintheSRTMcoverage.
Elevationdatawasdseveralotherpartsoftheworld.
Insummary,terraindatavariesbycountryfrom10-to90-meterresolution.
racyofimagedatainGoogleEarthalsovariesbylocale.
Mostlandiscoveredinattionperpixel,withsomeareas(e.
g.
LasVegas,NVandCambridge,centimetersperpixel.
Certainlocationsaroundtheworldimagery.
Improvedimageryforlocationsaroundtheworldisupdatedonon-goingbasis.
Theimageryisgenerallycurrenttowithinthreeyears.
UseofGoogleEarthDatainterpolationprocess,andbyaddingdatafromothersources.
Since2006,the3Dviewsofmanyareasaroundtheglobe,includingmanypruseofsupplemrecentlyupdatedto10-meterresolutionformuchoftheUnitesStatesanElevationsbelowsealevel(e.
g.
DeathValley,CAandtheDeadSea)arepresentedalevel.
sseaTheacculeast15-metersofresoluMA)attheveryhighresolutionof15useortho-rectifiedanToimportterrainandimagedatafromGoogleEarthtoAutoCAD,thepublishingtoolutilizeseveralpublicGoogleEarthApplicationProgrammingInterface(API)functioncalls.
EveryimagecreatedfromGoogleEarthusingsatellitedataprovidedbyGoogleEarthisacopyrightedmap.
AnyderivativefromGoogleEarthismadefromcopyrighteddatawhich,underUnitedStatesCopyrightLaw,maynotbeusedexceptunderthelicensesGoogleprovides.
Googleallowsnon-commercialpersonaluseoftheimagesaslongascopyrightsandattributionsarepreserved.
YoushouldrespectlicensingrequirementsofGoogleEarth.
Seethefollowinglinksformoreinformation:http://earth.
google.
com/intl/en-US/licensepro.
htmlhttp://earth.
google.
com/support/bin/answer.
pyanswer=21422s
YouwillalsogainanunderstandingforthecontextinwhichGoogleEarthdatashouldbeused,andforthevariousoptionsavailableforpublishingDWGdatatoGoogleEarth,includingtemporaldata.
AbouttheSpeaker:TomisasoftwarearchitectfortheAutodeskAECDivision.
With23yearsofexperience,heisanexpertinthedesign,development,andimplementationofcivil-engineeringapplications.
Forthepast9years,TomhashelpedarchitectCivil3DintotheleadingAutoCAD-basedcivilengineeringapplication.
Hehasdegreesinmapping,andcivilengineeringandsurveying.
HismostrecentsideprojectatAutodeskhasbeentheimplementationoftheDWGpublishingextensionforGoogleEarth,availableontheAutodesklabssiteandwithinCivil3D.
PublishingDWGDataToGoogleEarthIntroductionThisclassprovidesinformationonthetwo-wayexchangeofdatabetweenAutoCAD(andAutoCAD-basedverticals)andGoogleEarth.
Thisexchangeofdatacanhelpyouinnumerouswaysinyourday-to-daydesignandengineeringresponsibilities.
Severalscenarioswherethisdataexchangemightbeusefulincludes:ImportimageryfromGoogleEarthforuseasadesignbackdrop.
ImportelevationreliefdataintoAutoCADtohelpdepictas-builtandproposedbuildingdesignsrelativetothesurfaceterrain.
PublishmapparcelinformationtoGoogleEarthasameansofdisseminatingcadastralinformation.
PublishfromAutoCADtoGoogleEarthtemporaldataforaphasedconstructionprojectthatcanusedbypublicagenciestodepicthowtheprojectwillimpactresidents.
WheretofindtheSoftwareDescribedinthisClassTheAutoCADGoogleEarthpublishingextensiontoolisavailableforfreeatAutodesk'slabswebsite,http://labs.
autodesk.
com.
Furthermore,AutoCADCivil3D2008includesmostofthefunctionalitydescribedhere-in.
UnderstandingGoogleEarth'sUserInterfaceThisclassutilizesseveralfeatureswithinGoogleEarthextensively.
Therearenumerouson-lineguidestousingGoogleEarth.
Fourthatarehighlyrecommendedare:GoogleEarthUserGuide:http://earth.
google.
com/userguide/v4/GoogleEarthBlog:http://www.
gearthblog.
com/basics.
htmlJuicyGeography'sGEBlog:http://www.
juicygeography.
co.
uk/blog/page_id=5GoogleEarthTimelines:http://earth.
google.
com/userguide/v4/ug_gps.
html#timeline-2-PublishingDWGDataToGoogleEarthImportImagefromGoogleEarthTopublishAutoCADmodelstoGoogleEarth,youmustfirstbeabletodefinethelocationofwherethemodelsaretobelocatedontheEarth'ssurface.
ThiscorrelationofAutoCADmodelspacecoordinatestoGoogleEarthlatitudeandlongitudecoordinatesisreferredtoageo-referencing.
Asimplemethodofgeo-referencingAutoCADmodelspacedataistoimportanimagefromGoogleEarthandpositiontheimageproperlyrelativetoyourmodeldata.
Additionally,youcanusetheimportedimageasabackdropfordesign.
Priortoimportingtheimageyoushouldcompletethefollowingsteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttocapturetheimage.
ZoomincloseenoughtocapturetheappropriatelevelofdetailoftheEarth'ssurfaceintheareaofinterest.
BesureyouarelookingstraightdownattheEarth'ssurface(thatis,theviewdoesnothaveanytilt.
)YoucanremovealltiltfromthecurrentGoogleEarthviewbypressingthe'u'key.
Generally,itisbesttokeeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthapplicationwindow.
NowyouarereadytobringanimageoftheGoogleEarthviewintoAutoCAD.
TheImportGEImagecommandisusedtoimportanimagefromGoogleEarth.
Afterselectingthecommand,therewillbeabriefpausewhiletheimageisobtainedfromGoogleEarth.
Then,arectanglerepresentingtheborderoftheimagewillbeattachedtotheAutoCADgraphicscursor.
Positiontheimagetothedesiredlocation,andthenspecifyarotationangletoorienttheimageasdesired,orIfAutoCADCivil3D2008orAutoCADMap3D2008isbeingused,andamapprojectionhasbeendefined,youcanselecttheoptionatthecommandprompttopositiontheimageautomaticallyusingthemapprojectioncoordinateconversionalgorithms.
Notethefollowingitemsabouttheimageimportprocess:Onceplaced,youmayuseAutoCAD'smoveandrotatecommandstofurtherrefinethepositionoftheimagerelativetoyourmodel.
DonotadjustthepositionofyourDWGmodel.
Rather,adjustthepositionoftheimagerelativetoyourmodel.
-3-PublishingDWGDataToGoogleEarthThedimensionsoftheimageinthedrawingaredefinedbytheextentoflongitudeandlatitudetheimagecoversinGoogleEarthandatransformationofthoseextentstothelinearunitsdefinedbytheINSUNITSsystemvariableinAutoCAD.
IfamapprojectionisactivewithinCivil3DorMap3D,onlythecenterpointoftheimageisplacedusingthemapprojectiontransformalgorithms.
Theextentsoftheimagearestilldefinedasinthepreviousitem.
TheimagedisplayedinthedrawingisanAcDbRasterImage,andisstoredinthesamefolderastheDWGfile.
ThefirstthreelettersoftheimagefilenamewillbethesameasthefirstthreelettersoftheDWGfile,andthefileextensionwillbeJPG.
Theimageentityhasx-dataattachedthatcontainsinformationaboutwhereontheEarth'ssurfacetheimagecovers.
Thisx-dataisusedtoproperlygeo-referencethemodelspacecoordinateswiththeGoogleEarthcoordinates.
TheimagebroughtintoAutoCADusingthiscommandwillonlybeblackandwhite,eventhoughtheimageinGoogleEarthisincolor.
ThisisalimitationimposedbyGooglewhenusingtheGoogleEarthapplicationprogramminginterface(API).
Thereisnowaytochangethis.
However,seethenextsectionforamethodtomanuallyimportacolorimage.
HereisanexampleofanimageoftheVenetianHotelimportedtoAutoCADfromGoogleEarth.
-4-PublishingDWGDataToGoogleEarthImportColorImagefromGoogleEarthAlthoughitisnotpossibletoimportacolorGoogleEarthimageautomatically,itisnever-the-lesspossibletodisplaycolorimagesinAutoCAD.
Priortoimportingtheimageyoushouldcompletethefollowingsteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttocapturetheimage.
ZoomincloseenoughtocapturetheappropriatelevelofdetailoftheEarth'ssurfaceintheareaofinterest.
Generally,itisalsobesttokeeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthapplicationwindow.
Next,fromwithinGoogleEarth,usetheFile>Save>SaveImage…commandtosavethecurrentGoogleEarthviewasaJPGimagefile.
Finally,fromwithinAutoCAD,usetheImageAttachcommandtoimporttheimageintotheAutoCADdrawing.
Notethefollowingitemsaboutthecolorimageimportprocess:Onceplaced,youmayuseAutoCAD'smove,rotate,andstretchcommandstofurtherrefinethepositionoftheimagerelativetoyourmodel.
TheimageisdisplayedinthedrawingisanAcDbRasterImage.
HereisacolorimageofNiagaraFallsimportedintoAutoCADfromGoogleEarth.
-5-PublishingDWGDataToGoogleEarthImportGoogleEarthTerrainasAutoCADMeshYoucanimporttheelevationdataforthecurrentGoogleEarthviewintoAutoCADasamesh.
AnewmaterialisalsocreatedinthecurrentdrawingfilefromanimagecreatedusingtheGoogleEarthview.
Thenewmaterialisassignedtothenewlycreatedmesh.
WiththerealisticshademodeforanAutoCADviewportturnedon,theimagewillappeardrapedonthenewlycreatedmesh.
Priortoimportingtheterraindataasamesh,youshouldcompletethefollowingsteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttoimporttheelevationdata.
EnsuretheTerrainlayerinGoogleEarthistoggleon.
BesureyouarelookingstraightdownattheEarth'ssurface.
(Thatis,theviewdoesnothaveanytilt.
)YoucanremovealltiltfromthecurrentGoogleEarthviewbypressingthe'u'key.
Also,forbestresults,zoomincloseenoughtocaptureenoughdetailoftheEarth'ssurfaceintheareaofinterest.
Lastly,keeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthwindow.
NowyouarereadytobringameshoftheGoogleEarthterrainintoAutoCAD.
TheImportGEMeshcommandisusedtocollectthemeshdata.
Afterabriefperiod,ameshrepresentingtheterraindatawillbeattachedtotheAutoCADgraphicscursor.
Positionthemeshtothedesiredlocation,andthenspecifyarotationangletoorientthemeshasdesired.
IfAutoCADCivil3D2008orAutoCADMap3D2008isbeingused,andamapprojectionhasbeendefined,youcanselecttheoptionatthecommandprompttopositionthemeshautomaticallyusingthemapprojectioncoordinateconversionalgorithms.
Notethefollowingitemsabouttheimportmeshprocess:Onceplaced,youmayuseAutoCAD'smoveandrotatecommandstofurtherrefinethepositionofthemeshrelativetoyourmodel.
DonotadjustthepositionofyourDWGmodel.
Rather,adjustthepositionofthemeshrelativetoyourothermodelspacedata.
-6-PublishingDWGDataToGoogleEarthThedimensionsofthemeshinthedrawingaredefinedbytheextentoflongitudeandlatitudethemeshcoversinGoogleEarth,andatransformationofthoseextentstothelinearunitsdefinedbytheAutoCADINSUNITSsystemvariable.
ThemeshisdisplayedinthedrawingasanAcDbPolygonMeshobject,andisoftypesimplemesh.
Themeshsizeisfixedat32rowsby32columns.
TheimagecapturedfromtheGoogleEarthviewissavedinthesamefolderasthedrawingfile,hasthesamethree-letterprefixasthefirstthreelettersinthedrawingfilename,andhasaJPGextension.
Thematerialcreatedinthedrawingisnamedusingthefirstthreelettersofthedrawingfile,followedbyseveralrandomnumbers.
ThematerialcreatedfromtheimagebroughtintoAutoCADusingthiscommandwillonlybeblackandwhite,eventhoughtheimageinGoogleEarthisincolor.
ThisisalimitationimposedbyGooglewhenusingtheGoogleEarthapplicationprogramminginterface(API).
Thereisnowaytochangethis.
However,seethenextsectionforamethodtomanuallydrapeacolorimageontothemesh.
HereistheMatterhornareaintheEuropeanAlpsimportedasameshwithamaterial.
-7-PublishingDWGDataToGoogleEarthImportColorGoogleEarthImageasAutoCADMaterialYoucancreateAutoCADmaterialsfromimagessavedfromGoogleEarth.
ThesematerialscanthenbeappliedtoAutoCADentities.
Priortocreatingthematerialyoushouldcompletethefollowing:StartGoogleEarth,andzoomtothelocationontheEarth'sZoomincloseenoughtocapturetheappropriatelevelofGenerally,itisalsobesttokeeptheGoogleEarthNext,fromwithinGoogleEarth,usetheSaveImage…commandtosurfacewhereyouwanttocapturetheimage.
detailoftheEarth'ssurfaceintheareaofinterest.
applicationwindowmaximized.
savethecurrentGoogleEarthviewasaJPGimagefile.
NowyouarereadytocreatetheneAutoCADmaterial.
FromwithinAutoCAD,createanewmaterialusingthetheUsesettingssimilartothoseshowninthedialogalongtheAttachthenewmaterialtoanyappropriateAutoCADentity,Usingthematerialmapcommand,selectthePlanaroptionFinally,changetotherealisticvisualstyleusingtheshademodecommand,andthecolorimageshouldappearontheentityasamaterial.
wmaterialscommand.
AssociatethesavedJPGimagetonewmaterial'sdiffusetexturemap.
rightsideofthispage,especiallysettheMaterialScalingandTilingandMaterialOffsetandPreviewvaluesasshown.
suchasameshobjectasimportedintheprevioustopic.
andapplyittotheAutoCADentity.
-8-PublishingDWGDataToGoogleEarthImportGoogleEarthTerrainasAutoCADCivil3D2008TerrainModelUsersofAutoCADCivil3D2008canimportterrainmodeldatafromGoogleEarthdirectlyintoaCivil3Dsurfaceobject.
Thesubsequentsurfaceobjectcanthenbevisualizedwithmorethantendifferentstyles.
ToimportterraindatatoaCivil3D2008surfaceobject,followthesesteps:StartGoogleEarth,andzoomtothelocationontheEarth'ssurfacewhereyouwanttocapturetheterrain.
EnsurethatyouarelookingstraightdownattheEarth'ssurface.
ZoomincloseenoughtocapturetheappropriatelevelofdetailoftheEarth'ssurfaceintheareaofinterest.
EnsuretheTerrainlayerwithinGoogleEarthistoggledon.
Generally,itisalsobesttokeeptheGoogleEarthapplicationwindowmaximized.
DonotminimizeorcollapsetheGoogleEarthapplicationwindow.
FromwithinCivil3D,usetheImportGESurfacecommandtocollecttheterraindatafromGoogleEarth.
Ifnomapprojectionisdefined,thenspecifytheoriginandrotationofthesurfacedata.
Withamapprojectiondefined,youcanhaveCivil3DautomaticallytransformtheGoogleEarthlongitudeandlatitudecoordinatestotheAutoCADworldcoordinates.
Finally,specifythename,description,anddisplaystyleofthenewsurface.
Notethesurfacedataisimportedasamatrixofpoints.
YoucanspecifythenumberofpointsinthematrixusingCivil3D'sSettings>Surface>Commands>ImportGESurface>GoogleEarthOptions>RowsandColumnssettings.
Thedefaultis100rowsand100columns,foratotalof10,000pointsresultinginapproximately20,000triangles.
HereisanexampleofterraindataimportedintoCivil3Danddisplayedseveraldifferentways.
-9-PublishingDWGDataToGoogleEarthMapProjectionsNumerousbookshavebeenwrittenontechniquestomapitemsontheEarth'scurvedsurfacetoplanarsurfaces.
Wewillnotdelveintomuchdetailhereotherthantonotethefollowingitems:TheinternalcoordinatesystemofGoogleEarthisgeographiccoordinateseWhennomapprojectionhasbeendefined,anapproximateformulaisusedtoconverts.
andaformalmapprojectionhasbeendefinedusingcommandsavailablewithinthoseformationsoverlarger(latitude/longitude)ontheWorldGeodeticSystemof1984(WGS84)datum.
AutoCADdoesnothavetheinherentnotionofdistancelinearcoordinates,sothevaluoftheAutoCADinsertionscale,INSUNITS,systemvariableisused.
Usetheddunitscommandtosetthatvalue.
betweentheGoogleEarthandAutoCADcoordinatesystemThisapproximatecoordinatetransformationmethodissuitablewhenworkingwithlocalizedareassuchasbuildingsitesandthelike.
WhenusingthepublishingtoolwithAutoCADCivil3D2008orAutoCADMap3D2008,products,amuchmorerigoroussetofformulaeareusedtoconvertbetweenthetwocoordinatesystems.
Thesemorepreciseconversionmethodsprovidesuitabletransdistancesandareas.
-10-PublishingDWGDataToGoogleEarthPublishingAutoCADModelSpaceEntitiestoGoogleEarthTopublishmodelspacedatatoGoogleEarth,usethePublishKMLcommand.
PriortopublishingdatatoGoogleEarth,youshouldknowthepositionofwherethemodelwillbeplacedontheEarthistousetheproceduredescribedintheand,youwillbepresentedwithasixstepseriesofdialogs,orWizard,3:Optionalvaluespecifyingthehyperlinktobeappliedhouldalsobeprovided.
:SpecifiesthatallmodelspaceentitiesshouldbeGoogleEarth.
selectionof7:Iftoggledpublishedaentities(for9:Includesinthepublishedfile.
theEarth'ssurface.
Thesimplestmethodtogeo-referencetheDWGmodelspacedatawithalocationonsectionImportImagefromGoogleEarth.
AfteractivatingthePublishKmlcommwalkingyouthroughtheprocessofpublishingthedata.
ThefollowingparagraphsaredescriptionsforeachiteminthepublishingWizard.
1:RequiredvaluespecifyingthenameoftheDWGmodelasdisplayedintheGoogleEarthPlacespanel.
2:OptionalvaluespecifyingthedescriptionoftheDWGmodelasdisplayedintheGoogleEarthPlacespanel.
tothefullDescriptiontextstring.
Ifthisvalueisspecified,thenaDescriptions4published.
5:Allowsyoutoselectspecificentitiesforpublishingto6:Temporarilyhidesthepublishingwizardandallowsmodelspaceentitiesforpublishing.
on,textstringsinthedrawingwillbesGoogleEarthnamedplacemarks.
8:PublishesadditionaltextualinformationaboutDWGusewithAutoCADCivil3D,AutoCADMap3D,orAutoCADArchitectureonly.
)anymaterialsattachedtoAutoCADentities-11-PublishingDWGDataToGoogleEarthPublishingDWGDataToGoogleEarth-12-10:SpecifiesthatthemapprojectiondefinedinthedrawingshouldbeusedtotransfAutoCADcoordinatestoGoogleEarthcoordinates.
(ForusewithAutoCADCivil3D2heDWGmodeldataontheEarth'ssurface.
ctionoflocationfor13.
th.
gAutoCAD'sGeographicLocationdialog.
intheNorth/SouthorEast/Westdirections.
SpecifytheGoogleEarth.
ormfrom008andAutoCADMap3D2008only.
)11:Specifiesthatauser-definedtransformbetweendrawingcoordinatesandGoogleEarthcoordinatesisusedtotransformthedrawingdata.
12:CollectslocationinformationfromanimportedGoogleEarthimagetoassistinpositioningt13:DefinesthelocationintheDWGmodelspacethatisgeo-referencedtoaspecificlocationontheEarth'ssurface.
14:Allowsinteractivesele15:DefinesthelocationontheEarth'ssurfacethatisgeo-referencedtoaspecificlocationintheDWGmodelspace.
16:AllowsapproximatedefinitionofageographiclocationusingAutoCAD'sGeographicLocationdialog.
17:Definestherotation(ifany)ofthepositiveY-axisforAutoCADmodelspacetotheNorthdirectioninGoogleEar18:AllowsapproximatedefinitionoftheY-axisorientationusin19:DefinesanamounttooffsettheDWGmodelvalueinthesameunitsasdefinedbytheAutoCADINSUNITSsystemvariable.
20:DefinesanamounttooffsettheelevationoraltitudeoftheDWGmodeldata.
UsethisvaluetofinetunethepositionofthemodelinSpecifythevalueinthesameunitsasdefinedbytheAutoCADINSUNITSsystemvariable.
-12-PublishingDWGDataToGoogleEarth21:ControlshowthemodelspaceZ-coordinateofentitiesismappedtoelevationsinGoogleEarth.
YoucanspecifythatmodelspaceZ-coordinatesare:Relativeelevations:addedorsubtractedtotheeubtratitidatafilensisingtheKMZextension.
NoteextensionofKMZwillalwaysbeused.
23:Initiatesthepublishingprocessandcreatesthedatafile.
nd.
ft)plevationoftheEarth'ssurfaceinthectedtothesealevelheight.
es,andusestheelevationofthegroundforuseinGoogleEarth.
ExtensionsofKMZdbyGoogleEarth.
PublishedDWGonisused.
Alargereductioninfilesizethatwhenpublishingmaterials(item9)anzoomstotheareawherethepublishedublishedtoGoogleEarth(right).
areawherethemodelisbeingpublished.
Absoluteelevations:addedorsDrape:IgnorestheZ-coordinatevalueofenwheretheentityislocated.
22:Definesthefilenameofthepublished(compressed)andKML(uncompressed)arebothrecognizemodelscanresultinlargedatafilesiftheKMLextewilloccurwhenu24:OpensthepublisheddatafileinGoogleEarth,adataislocatedHereisanexampleofAutoCADbuildingmodel(le-13-PublishingDWGDataToGoogleEarthThefollowingitemsareimportanttonoteaboutthepublishingprocess:Publishedmodelscanbesharedwithothersbysimplysharingthepublisheddatafile.
oogle's3DWarehouselocatedathttp://sketchup.
google.
com/3dwarehouse/upload_detailswebupload=true&uptyp=mnYoucansharemodelswithothersusingG.
DWGmodeldataisgroupedundertheModelfolderintheGoogleEarthPlacespane.
pedintheCamerasandPathsfoldersinthePlacespane.
fined,thedefaultbehavioristoautomaticallyusetheingcoordinatestoGoogleEartheEarth,eaccurateconversionispossibleiftheautomaticmapprojectiontransformationisused(ifoneisavailable).
Whenpublishingmaterials(item9),GoogleEarthlimitsthemodelsizeto21845d.
Ifyourmodelislargerthanthis,publishthewillalwayshaveaKMZextension.
einformationassociatedCamerasandpathsaregrouColorsofpublishedentitiesinGoogleEartharecloselymatchedtoAutoCADcolors.
Onlymodelspacedatamaybepublished.
WhenusingthepublishingtoolwithinAutoCADCivil3D2008orAutoCADMap3D2008,andamapprojectionisdemapprojectionformulae(item10)toconvertfromdrawcoordinates.
YoucanoptionallymanuallydefinetheAutoCADtoGooglcoordinatetransformationontheGeo-Referencepageofthepublishingwizard(item11)butamortriangleswhenmaterialsareincludemodelseveraltimesinsmallerpartitions.
Whenpublishingmaterials(item9),thedatafileWhenpublishingEntityInformation(item8),additionalattributwiththeentitiesisviewableinGoogleEarthpane.
Apop-upwindowanchoredontheentityintheGoogleEarthviewwilllisttheattributedata.
TheattributeinformationpublishbyclickingontheModeliteminthePlacesedvariesbyproduct:AutoCADProductEntityAttributeInformationPublishedAutoCAD2008None.
Civil3D2008Predefinedsetofattributesthatvariesbyentitytype.
Map3D2008Predefinedsetofattributesthatvariesbyfeaturetype.
Architecture2008UtilizesPropertySetdata.
onSeeAutoCADArchitecture2008helpforinformationattachingPropertySetdatatoentities.
-14-PublishingDWGDataToGoogleEarthIncludingTemporalInformationwithPublishingEntitiesGoogleEarthprovidestheabilitytoconditionallydisplaypublishedmodeldatabasedonstartandeferredtoasaeoveraIfyoupublishedtoGoogleEarth,youcanusethetimelinetoolwithinthatapplicationtocontrolthedisyPriootechniquetoassociatetimewiththevariousentities.
Thiswillvaryfrommodeltomodel.
ForexalassociateonetimespanwiththefirstfloorcolnwouaToattaGETimAfteraoneorpanforGoogleEarthdialogappears.
Definethe(optional)starttimeandpAfterthshedtoGoogleEarth,usetheTimelineslidercontroltodisplayyourmoFeare1:Click2:Dragdatadisplayed.
yananimationofthovetherangewholeset.
4:Clickthistosetoptionsforthemovethetimerendtimesattachedtoeachpieceofmodeldata.
Thesestartandendtimesarernntity'stimespan.
Thisisausefultoolwhereyouneedtopresentdevelopmentprogressperiodoftime.
AttachingtimespaninformationtoAutoCADentitiesisentirelyoptional.
decidetoattachstartandendtimestoAutoCADmodelspaceentitieswhenthemodelisplaofthemodeldata.
rtattachingtimeinformation,youshouldanalyzeyourmodelanddecideonthebestmpe,forastructuralframingmodel,youmightums,asecondtimespanwiththesecondfloorbeams,andsoon.
Usingthistechniqueldllowyoutoanimatetheupwardconstructionofthebuildingframing.
chtimespaninformationtoAutoCADentitiespriortopublishingthedatausetheecommand.
ctivatingthecommand,youwillbepromptedtoselectmoremodelspaceentities.
Then,theTimes(otional)endtimefortheselectedentities.
eAutoCADmodelspaceentitiesarepublideldataoverthedefinedtimeperiod.
tusoftheTimelinesliderinclude:thesearrowstomovethetimerangeearlierorlater.
theserangemarkerstotherightorlefttore-definethetimerangeof3:Clickthistoplaesequence.
Thisworksbestifyoummarkerstodefineatimerangesmallerthanthetimeslider.
5:Dragthistoangeearlierorlater.
-15-PublishingDWGDataToGoogleEarthNotethefollowingimportantpointsrelatedtoattachingtimeinformationtomodearetioncanbeached,atooupdalspaceentities:Ifastarttimeisnotattachedtoanentity,thentheentitywilldisplaystartingatthebeginningofthetimeslidertoolinGoogleEarth.
Similarly,ifanendtimeisnotattachedtoanentity,thentheentitywilldisplayfromthestarttimethroughtotheendofthesliderbar.
AnentitywithoutanytimespaninformationattachedtoitwillalwaysbedisplayedinGoogleEarth.
TimeinformationassociatedwithAutoCADmodelspaceentitiesisattachedtothoseentitiesusingX-Data.
Timespaninformationattachedtoentitiesinmodelsisnotpublishedwhenmaterialspublished;eithertimeinformationcanbepublishedormaterialinformapublished,butnotboth.
IfyouhoveroveranentitywithtimespandataattltipwiththestartandendtedbyrerunningtheGETimetimeswillbedisplayed.
Existingtimespandataattachedtoanentitycanbecommandontheentity.
-16-PublishingDWGDataToGoogleEarthComparisonofVariousAutodeskProductsthatInteractwithGoogleEarthThispresentationhasconcentratedonAutoCADandtheAutoCAD-basedverticalapplicatinteractionwithGoogleEarth.
Autodesk'sRevitArchitecionstureandMapGuideproductsalsocanaexchangethatcancurrentlyoccuralsosenddatatoGoogleEarth.
ThefollowingtabledelineatesthevarioustypesofdatbetweenAutodeskproductsandGoogleEarth.
2008ProductImportGEImageImportGEMeshImportGETerrainModelGETimeSupportsPublishtoMapGEProjectionsAutoCAD9999AutoCADCivil3D999999AutoCADMap3D99999AutoCADArchitecture9999MapGuide99RevitArchitecture99-17-PublishingDWGDataToGoogleEarth-18-AccuracyofGoogleEarthDataGoogleEarthhasdigitalelevationmodel(DEM)datacollectedbyNASA'sShuttleRadarTopographymission.
InGoogleEarth,theresolutionofthecellsofthesourcedataisapproximately30metersoverUnitedStatesterritory;fortherestoftheworld,only90meterspacinghasbeenmadeavailable.
GoogleEarthhasimprovedtheirresultsusingaspecializedominentmountains,havebeenimprovedbytheentaryDEMdatatofillthegapsintheSRTMcoverage.
Elevationdatawasdseveralotherpartsoftheworld.
Insummary,terraindatavariesbycountryfrom10-to90-meterresolution.
racyofimagedatainGoogleEarthalsovariesbylocale.
Mostlandiscoveredinattionperpixel,withsomeareas(e.
g.
LasVegas,NVandCambridge,centimetersperpixel.
Certainlocationsaroundtheworldimagery.
Improvedimageryforlocationsaroundtheworldisupdatedonon-goingbasis.
Theimageryisgenerallycurrenttowithinthreeyears.
UseofGoogleEarthDatainterpolationprocess,andbyaddingdatafromothersources.
Since2006,the3Dviewsofmanyareasaroundtheglobe,includingmanypruseofsupplemrecentlyupdatedto10-meterresolutionformuchoftheUnitesStatesanElevationsbelowsealevel(e.
g.
DeathValley,CAandtheDeadSea)arepresentedalevel.
sseaTheacculeast15-metersofresoluMA)attheveryhighresolutionof15useortho-rectifiedanToimportterrainandimagedatafromGoogleEarthtoAutoCAD,thepublishingtoolutilizeseveralpublicGoogleEarthApplicationProgrammingInterface(API)functioncalls.
EveryimagecreatedfromGoogleEarthusingsatellitedataprovidedbyGoogleEarthisacopyrightedmap.
AnyderivativefromGoogleEarthismadefromcopyrighteddatawhich,underUnitedStatesCopyrightLaw,maynotbeusedexceptunderthelicensesGoogleprovides.
Googleallowsnon-commercialpersonaluseoftheimagesaslongascopyrightsandattributionsarepreserved.
YoushouldrespectlicensingrequirementsofGoogleEarth.
Seethefollowinglinksformoreinformation:http://earth.
google.
com/intl/en-US/licensepro.
htmlhttp://earth.
google.
com/support/bin/answer.
pyanswer=21422s
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