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ClicktoopentheModifyThematicMapdialogboxandsetdisplay
attributesforathematiclayer.Thisbuttonisonlyactiveafterselecting
athematiclayer.
ModifyTheme
ClicktoopentheHotlinkOptionsdialogboxwhereyoucanspecify
filenameexpression,filelocations,whatactivatesHotLink,andsaving
HotlinkOptions
optionstotablemetadata.SeeCreatingActiveObjectsintheHelp
System.TheHotlinkOptionsbuttonenablesonlyafterselectinga
singlelayer.
ClicktoopentheAdjustLabelingPrioritiesdialogboxwhereyou
canmovelayersupanddowninthelisttoadjustlayerprioritywhen
AutomaticLabelingisturnedonforlayers.
AdjustLabeling
Priorities
TheAdjustLabelingPrioritiesbuttonisenabledwhentheactivemap
hasatleasttwolayersthatcanbelabeled(thisdoesnotinclude
raster,theme,orcosmeticlayers).
Clicktocontrolwhetheryoucanselectlabelswhenyouclickonthe
map.Bydefault,labelsareselectable.Youmightmakelabels
SelectableLabels
unselectableifyoufindthatyouareaccidentallyselectinglabelson
themapwhenyouweretryingtoselectpointsorlines.Thisisaper
mapsetting,soeachMapwindowhasitsownsetting.Eachmap's
SelectableLabelssettingispreservedwhenyousaveaworkspace.
Clicktoallowmapredrawortoturnoffmapdisplayaschangesare
madetolayers.Selecttosuspendautomaticredrawwhenthereare
manylayersthatslowtheredrawprocess.
AutomaticMap
Drawing
ClicktoopentheLayerControlOptionsdialogboxandsetwhich
mapsshowintheLayerlist,enableconfirmationwhenremovinga
LayerControlOptions
layer,disabletooltipsintheLayerControlwindow,andshowor
hideiconsintheLayerControlwindow.
MovingtheLayerControlWindowtoCustomizeYourWorkArea
TheLayerControlisafloatingwindow,sothatyoucanleavetheLayerControlwindowopenthroughout
yoursession.Italsodockstothesideoftheapplicationwindow,sothatyoucancustomizeyourwork
area.
TomovetheLayerControltoanotherlocationintheapplicationwindow:
Undockit-Double-clicktheLayerControlwindowtitlebar,sothatitfloats.Youcanthenmoveit
toanotherlocationintheapplicationwindow.
• Dockit-DragtheLayerControlwindowbythetitlebar,towardtheleftorrightsideofthescreen,
sothattheLayerControlwindowsnapsintoplace.
Ifyourcomputerhastwomonitors,trydraggingtheLayerControlwindowontothesecond
monitor.ThisarrangementallowsmoreroomforMapwindowsonthefirstmonitor.
Note:
AddingLayerstotheMap
YoucanaddonelayertothecurrentMapwindowatatimeorusethemulti-selectfunctionalitytoadd
layerssimultaneously.
Youcanonlyaddlayersfromtablesthatareopen.Ifyouwanttoaddalayerandyoudonotsee
itinthelist,makesurethetablethatcontainsthatlayerisopen.
Note:
• Formoreinformation,seetheHelpSystem.
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ReorderingMapLayers
MaplayersdisplayintheorderthattheyarelistedintheLayerControlwindow,withthebottomlayer
drawnfirstandthetoplayer(whichisalwaystheCosmeticLayer)drawnlast.Itisimportanttoorder
yourlayerscorrectly.
Forexample,youhavealayerofcustomerpointsandalayerofcensustracts.Ifthelayersareincorrectly
orderedintheMapwindow,MapInfoProfessionalmightdrawthecustomerpointsfirstandthendisplay
thecensustractlayersecond.Yourpointswouldbeobscuredbythecensustractlayer.Youcanreorder
howlayersaredisplayedinaMapwindowtwoways.
• Formoreaboutlayers,seeReorderingLayers,ChangingtheOrderofContiguousLayersandChanging
theOrderofRandomLayerstopicsintheHelpSystem.
LayerorderisalsoimportantwhenyouusetheSelectbutton.TheSelecttoolselectsobjectsfromthe
topmostSelectablelayer.Ifyouhaveseveralobjectsatthesamelocation,itisdifficulttoselecttheexact
oneyouwant.YoucanreorderyourlayersinLayerControlsothatthelayeryouwanttoselectfromis
thenewtopmostlayer.
MapInfoProfessionaldoesnotallowyoutocontrolthefront-to-backorderingofobjectswithinasingle
maplayer.Ifyouareeditingatable,andyoudrawalineontopofacircle,thelinemightappearinfront
oforbehindthecircle;youcannotcontrolwhetheritisinthefrontortheback.Youcan,however,control
thefront-to-backorderingofobjectsinaLayoutwindow.
Ifyouneedtocontroltheorderingofobjects(forexample,youneedtomakesurethatyourlines
displayontopofyourregions),putthedifferentobjecttypesinseparatelayers.Putyourline
Note:
objectsinonetable,andputyourregionobjectsinanothertable.ThenusetheLayerControl
windowtoorderthelayers.
• Formoreinformation,seeRemovingaLayerfromtheMapandChanginghowaLayerDisplayson
theMapintheHelpSystem.
SettingtheZoomLayering
Sometimesyouwantamaplayertodisplayonlyatcertainzoomlevels.ZoomLayeringcontrolsthe
displayofamaplayersothatitdisplaysonlywhenthemap'szoomlevelfallswithinapresetdistance.
Forexample,youhavealayerofstreetsandalayerofpostalcodeboundaries.Whenyouzoomout
past10orsomiles,thestreetslooklikeablacksmudgeinthewindow.Thisisbecausethezoom(window
width)istoowidetoshowdetailedstreetmaps.UseZoomLayeringtotellMapInfoProfessionaltodisplay
MapInfoProfessional12.5
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WorkingwithLayersintheLayerControl
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thestreetlayeronlywhenthezoomissettoadistancethatallowsyoutoseethestreetdetailproperly,
forinstance,lessthan5miles.
Thefirstmapdoesnothavezoomlayeringsetforitsstreetlayer.Atazoomof15milesacross,notice
howdifficultitistoseeanydetail.Thesecondmaphaszoomlayeringsettodisplaythestreetswhen
thezoomislessthanfivemiles.Therefore,thestreetslayerdoesnotdisplaywhenthewindowissetat
15miles.
Formoreinformation,seeSettingtheZoomLayeringintheHelpSystem.
YoucandisplaydifferentlayersinthesameMapwindowatdifferentzoomlevels.Forexample,you
havealayerofstreets,alayerofcountyboundaries,andalayerofstateboundaries.Youwantthe
streetslayertobevisibleonlywhenthezoomlevelislessthaneightmiles.Youwantthecountyboundary
layertodisplaywhenthezoomlevelfallsbetween20milesand200miles.Youwantthestatesboundary
layertobevisibleonlywhenthezoomlevelisgreaterthan100miles.Youcansetadifferentzoomlevel
foreverylayerinyourMapwindow.
Whenyouaddanobject,aregion,aline,orapolylineintheMapwindowandzoomoutbeyond
wherethezoomlayerwouldpermityoutoseethatfeature,MapInfoProfessionalturnsoffzoom
Note:
layeringsoyoucancontinuetoseewhatyouareworkingon.Whenyoucompletetheadd
process,amessagedisplaysaskingyouifyouwanttoleavezoomlayeringoff(soyouwillstill
beabletoseethefeature).IfyouclickCancel,MapInfoProfessionalcancelsthezoomlayering.
IfyouclickOK,youneedtoadjustyourzoomsettingstoseethisfeatureagain.
Formoreinformation,seeChangingaMap'sZoomLevelintheHelpSystem.
PositioningandSizingLabels
TolabelamapobjectusingtheLabelbutton:
1. Makesurethatthelayercontainingtheobjectsyouwanttolabelisselectable.ChooseMap>Layer
ControlandclicktheSelectable
icontomakethelayerselectable.
2. ClicktheLabel
buttonintheMaintoolbar.
3. ClickonanobjectwiththeLabelbuttontodisplayalabelforthatobject.
MapInfoProfessionallabelstheobjectwiththevalues(fromthecolumnthatyouspecifiedforthatlayer
intheLayerPropertiesdialogboxontheLabelDisplaytab).
ChangingLabelOptions
TwofeaturesintheLayerPropertiesdialogboxhelpyouwithlabelplacement:LabelPositionand
Offset.
Tochangelabeloptions:
1. ChooseMap>LayerControl.TheLayerControlwindowopens.
2. IntheLayerlist,double-clickthelayername.TheLayerPropertiesdialogboxopens.
3. SelecttheLabelDisplaytabandspecifythedesiredlabeloptions,suchaslabelstyle.
4. SelecttheLabelingRulestabandspecifythedesiredlabelplacementandlabeladjustments,such
asallowordiscardoverlappingtext,tryotherpositionswhenoverlappingoccurs,allowduplicate
text,andlabelpartialobjects.
LabelPosition(alsocalledtheanchorpoint)isthelabel'spositionrelativetothemapobject.Click
ononeofthebuttonstoselectananchorpoint.Youhaveninechoices.
Theanchorpointisanongoingattributeofthelabel.Forexample,ifyouanchorapointobject'slabel
atCenterLeftandyouincreasethelabel'sfontsize,thetextwillgrowtotheleft.Thisway,thetext
canneveroverwritethepoint.
Thedefaultanchorpointvarieswiththetypeofmapobjectyouarelabeling:
• RegionsdefaulttoCenter.
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• LinesdefaulttoBelowCenter.
• PointsdefaulttoRight.
LabelOffsetishowfarawayalabelisfromitsanchorpoint.Specifythenumberofhalfspacesyou
wantthelabeltobefromtheanchorpointintheLabelOffsetbox.
5. ClickOK.
Themapredrawswithyourchanges.
LabelSize
Labelsizedoesnotchangewithzoomorscalechanges.Labelsdisplayatthesizeyouspecifyatall
zoomlevelsaswellasonprintedoutput.Labelsareneverhiddenbehindothergeographicobjects
becausetheyarealwaysthelastobjectsdrawnonthemap.
DisplayingtheLines,Nodes,andCentroids
TheLayerPropertiesdialogboxallowsyoutodisplaylinedirections,nodes,andobjectcentroids.
SelecttheShowLineDirectioncheckboxwhenyouwanttoshowthedirectioninwhichlineobjects
aredrawn.ChecktheShowNodescheckboxtodisplaythenodesinalayer.
TheShowCentroidsboxdisplaysthecentroidsofeachobjectinalayer.InMapInfoProfessional,a
region'scentroiddoesnotrepresentitscenterofmass.Instead,thecentroidrepresentsthelocation
usedforautomaticlabeling,geocoding,andplacementofthematicpieandbarcharts.Ifyoueditamap
inReshapemode,youcanrepositionregioncentroidsbydraggingthem.
SeetheHelpSystemfortheserelatedtopics:
• ChangingaLayer'sLabelingOptions
• ChangingaRegion'sCentroid
• ChangingaLabel'sStyle
• DrawingAutolabels
Forinstructionsoninsertingtable-basedstyleintheLayerControlwindow,seeInsertingStylesinto
TablesintheHelpSystem.
UnderstandingtheCosmeticLayer
EveryMapwindowinMapInfoProfessionalhasaCosmeticLayer.ThinkoftheCosmeticLayerasthe
blanktransparencythatliesontopoftheothermaplayers(transparencies).Itcanstoremaptitlesand
othergraphicobjectsyoucreateduringaworksession.TheCosmeticLayerisalwaysthetoplayerof
themap.YoucannotremoveorreordertheCosmeticLayer.
YoucanonlymaketheCosmeticLayereditableorselectable.OtherLayerControloptions(labeling,
zoomlayering,displaymode)arenotavailablefortheCosmeticLayer.Toselectfillpatterns,linetypes,
symbols,andtextfontfortheCosmeticLayer,usetheLineStyle,RegionStyle,SymbolStyleandText
MapInfoProfessional12.5
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WorkingwithLayersintheLayerControl
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StylecommandsfromtheOptionsmenu.WhentheCosmeticLayeriseditable,youcanaccessthestyle
optionsfromtheDrawingToolbar.
ThecontentsoftheCosmeticLayerarelinkedproportionallytothemap.Mapobjects(exceptforsymbols)
andtextintheCosmeticLayerareproportionallylinkedtothezoomlevelofthemap.Ifyoudrawobjects
intheCosmeticLayerandthenchangethemap'szoomfrom30to100miles,thesizeoftheobjectswill
appearsmaller.
TheHelpSystemcontainstheserelatedtopics:
• UsingtheCosmeticLayer
• SavingCosmeticLayerObjects
• SavingObjectsontheCosmeticLayer
• RemovingCosmeticObjects
• DisablingtheSaveCosmeticObjectsWarningDialogBox
MakingtheLayers"Editable"
Tomakechangestothegraphicobjectsinalayer,youmustmakethelayereditable.Youcandraw
objectsonthatlayer,addtext,combine,ordeleteobjects.Youcanonlymakeonelayereditableata
time.
• Forspecificinstructions,seeMakingLayersEditableintheHelpSystem.
MakingaRead-OnlyTable"Editable"
IfyouareworkingwithtablesthatwereopenedfromExcel,Lotus,orASCIIfiles,youmayhavenoticed
thattheycomeinasread-onlytables.BecausethefilesarenotinnativeMapInfoProfessionalformats
orstandardDBFformat,MapInfoProfessionalisunabletoeditthetabularinformationcontainedinthese
tables.
Ifyouwishtomodifythetableinformation,youmustsaveacopyofthetable.Youcandothiswhenyou
openthetableinMapInfoProfessionalbyselectingtheCreatecopyinMapInfoformatforread/write
checkboxbeforeselectingOpenintheOpendialogbox.
• Forinstructionsonmakingread-onlymaplayerseditable,seeMakingLayersEditableintheHelp
System.
GettingLayerInformation
YoucanusetheInfotoolbuttontogetinformationpertainingtothemaplayer.
Togetinformationaboutanobjectinaparticularlayer:
1. Makesurethelayeryouwantinformationaboutistheselectablelayer.
2. ClickInfo
intheMaintoolbarandclicktheobjectyouwantinformationabout.
Iftheinformationthatdisplaysisnotwhatyouwerelookingfor,checktoseethatthelayer
youareinterestedingettingdataforisselected.
Note:
Usingeithermethod,theInfoToolboxdisplays.
75
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Chapter3:TheBasicsofMapInfoProfessional
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UsetheCtrl
keywiththeInfobuttontotogglethroughallselectablelayersandaccess
overlappingobjects.
Note:
WhenyouclickamaplocationusingtheInfobuttonwheretwoormoreselectablemapobjectsoverlap,
thedatatiedtotheobjectsoneachlayerdisplayintheInfotoolwindow.Ifyoudonotwanttheinformation
foralllayerstodisplay,turnoffSelectableforthoselayersintheLayerControlwindow.
Youcanalsoviewanobject'slabelexpressioninanInfoTipwhenyouusetheSelect,Info,orLabel
buttons.InfoTipsworkverymuchlikeToolTips.Usingoneofthesetools,placeyourcursoroveran
object.AnInfoTipdisplaysthelabelexpressionfortheobjectinthetopmostselectablelayer.Toset
InfoTipsforaparticularlayer,adjusttheSelectableattributeintheLayerControlwindowsothattheTips
displayforthelayeryouwant.InfoTipsareactivebydefault,butyoucanturnthemoffintheMapwindow
preferences(ontheOptionsmenu,pointtoPreferencesandclickMapwindow).
SelectingObjectsinaLayer
Ifyouonlywanttoselectobjectsforfurtheranalysisratherthanedittheobjects,makethelayerselectable.
Morethanonelayercanbeselectableatatime.Ifalayeriseditable,itisalsoselectable.
ManyMapInfoProfessionalfunctionsrequirethatmapobjectsbeselectedbeforeperformingtheparticular
operation.TousetheSelectbutton,LabelbuttonorInfobuttonyoumustfirstmakethelayerselectable.
Unliketheeditablefeature,morethanonelayermaybeselectableatthesametime.Youmay,however,
onlyselectfromonelayeratatime.
TheSelectbuttonselectsobjectsfromthetopmostSelectablelayer.Toselectanobjectthatisnotin
thetopSelectablelayer,youcanturnofftheSelectableoptioninLayerControlforeverylayerabove
thelayeryouwanttoselectfrombyselectingalayer'sSelectable
icontodeactivateit.Alternately,
youcanleavealllayersSelectableandusetheCtrl
keyincombinationwiththeSelectbuttontocycle
througheachSelectablelayer.
Theinstructionsformakingalayereditablearethesame,exceptthatyouselectEditableOn/Off
instead.
Note:
• Forinstructionsonmakingobjectsinalayerselectable,seeSelectingObjectsinaLayerintheHelp
System.
MapInfoProfessional12.5
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WorkingwithLayersintheLayerControl
Forexample,ifyouwanttofindallcustomerswholivewithinafiftykilometersradiusofParis,makethe
Streetlayerselectable.Ifthemapalsoincludesalayerofhospitals(whichyoudonotwanttoinclude
intheradiussearch),turnofftheSelectableoptionforthehospitallayer.
TheEditableorSelectableoptionsonlyapplytotheMapwindowitself.Youcanalwaysselectobjects
usingtheSelectorSQLSelectcommandsregardlessofwhetheralayerisselectable.
Working with Thematic Layers
WhenyoucreateathematicmapinMapInfoProfessional,thethematicshadingisaddedtoyourmap
asaseparatelayer.Itisdrawnontopofthelayer,fromwhichitgetstherawdata.Separatingathematic
layerfromitsbaselayerprovidesyouwithseveralimportantoptions:
• Graduatedsymbolthematicmapsdonotrequirethatyourbaselayercontainpointobjects.Instead,
graduatedsymbolobjectsarebuiltregardlessofthemapobjecttype.Therefore,evenifyourbase
layercontainsregionorlineobjects,youwillstillbeabletocreateagraduatedsymbolsmap.
• Youcanhavemultiplethematiclayersperbaselayer.Insomecases,youdonothavetoaddanother
baselayertothemaptocreateanotherthematiclayer.Youcandisplaymorethanonethematiclayer
atatime,aswellasperformbivariatethematicmapping.
• YoucanuseLayerControltoturnthedisplayonoroffforagiventhematiclayer.Thelayeritisbased
oncancontinuetodisplay.Youcanalsosetindividualzoomlayersonthematicmaps.
OrderingThematicLayers
Todisplaythematiclayersproperly,theymustbeinaspecificorder.Thisisespeciallyimportantwhen
youwanttodisplaymorethanonethematiclayeratatime.Forexample,youwouldwantpieorbar
chartsforanareamaptodisplayontopofregionsthatareshadedinordertoseethem.
Thefollowingliststheorderofmaplayersfromtoptobottom(notethatmaplayersaredrawnfromthe
bottomup):
1. Pies,Bars,orGraduatedSymbolthematiclayer.
2. DotDensitythematiclayer.
3. Rangedthematiclayer-whereColororSizeAttributesareapplied.
4. Ranged(orIndividualValue)thematiclayer-whereAllAttributesareapplied.
5. Majorlayerorbaselayer.
6. Gridthematiclayer.
Whenyoucreateanewthematiclayer,MapInfoProfessionalautomaticallyinsertsitintoitsproperplace.
• Formoreinformation,seeReorderingThematicLayersintheHelpSystem.
DisplayingThematicLayers
Youcanturnthedisplayonandoffforthematiclayersthesamewayyoucanforothermaplayers.All
thedisplaysettingsinLayerControlarealsoapplicabletothematiclayers,enablingyoutosetazoom
levelforeachthematiclayer.YoucanalsoaccesstheModifyThematicMapdialogboxthroughLayer
Controlbydouble-clickingaThematiclayer.
Thematiclayersarealwaysdrawnaftertheirbaselayer.Therefore,theyappearabovetheirbaselayer
intheLayerControllist,andareindentedtodistinguishthemfromothermaplayers.
Thematiclayersaredisplayedinthelistwiththisnamingconvention:
<Thematic type> with/by <variable-list>
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Thetypeofthematicmapisnotedfirst,followedbythelistofvariablesusedtocreatethemap.For
example,apiethematiclayerthatusescommutingdataislistedthisway:
Pies with ComAlone, ComCarpool...
Thevariablelististruncatedifthereisnotenoughroomtodisplayeachvariableusedinyourthematic
analysis.Formoreinformationaboutthematicmapping,seeUsingThematicMappingtoAnalyze
Information.
ConvertingObjectsintoRegionObjects
Whenyouconvertacircleorellipseintoaregion,theregioncontains101nodes.Whenyouconvertan
arcintoaregion,thenumberofnodesdependsonthestartingandendingangleofthearc.Ifthearc
spans180degrees(forexample,thestartingangleiszeroandtheendingangleis180),aregionbased
onthearcwillcontain52nodes;ifthearcspans90degrees,aregionbasedonthearcwillcontain27
nodes;etc.
Ifyouperformextensivemapediting,youmayneedtoconvertpolylinestoregions.Ifyoucutorcopya
groupofselectednodes,MapInfoProfessionaltreatsthesetofnodesasapolylineobject,andplaces
thepolylineontheclipboard.Ifyouthenpastetheobject,MapInfoProfessionalplacesthepolylineon
yourmap.Atthispoint,youmaywanttoperformConverttoRegions,dependingonwhetheryouwant
thefinishedobjecttobearegion.
ConverttoRegionsalsoallowsyoutoperformnode-editingoperations(forexample,addingandmoving
nodes)onobjectsthatordinarilydonotallownodeediting.Forexample,MapInfoProfessionaldoesnot
allowyoutoaddnodestorectangleobjects;however,ifyouconvertarectangleobjecttoaregion,you
canthenaddnodestotheregion.
Toconvertobjectsintoregionobjects:
1. MaketheMapwindowactive.
2. Choosethelayercontainingtheobjectsandmakeiteditable.
3. Selectoneormoreobjectsfromtheeditablelayer.
4. ChooseObjects>ConverttoRegions.
WhenyouchooseConverttoRegions,MapInfoProfessionalconvertseachoftheselectedobjects
intoaregionobject.Eachobjectisconvertedintoaseparateregion;MapInfoProfessionaldoesnot
combineallselectedobjectsintooneregion.Tocombineobjects,usetheCombinecommand.
MapInfoProfessionalautomaticallyassignsthecurrentregionstyletoeachoftheregionobjects.To
specifyaregionstyle,chooseOptions>RegionStyle.
Line,polyline,arc,ellipse,rectangle,androundedrectangleobjectsmayallbeconvertedtoregions.
TheConverttoRegionscommanddoesnotaffectpointobjects,textobjectsandregionobjects.
5. Formoreinformation,seetheCreatingRegionsfromPolygonalAreasEnclosedbyPolylinestopic
intheHelpSystem.
WorkingwithRasterandGridLayersinLayerControl
Arasterimageisatypeofcomputerizedimagethatconsistsofrowafterrowoftinydots(pixels).Ifyou
haveascannerandscannersoftware,youcancreatearasterimagebyscanningapapermap.After
youscanamapimageandstoretheimageinafile,youcandisplaythefileusingMapInfoProfessional.
Incontrast,vectorimagescontaincoordinate-baseddatastructuresrepresentedbyxandycoordinates
(mostofMapInfoProfessional'sdataisinvectorformat).
TheHelpSystemcontainstheserelatedtopics:
• DisplayingaRasterImage
• RegisteringtheCoordinatesofaRasterImage
• WorkingwithRasterImages
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WorkingwithThematicLayers
• ChangingtheDisplayofaRasterImage
ConvertingGridFilestoMapInfoProfessionalGrids(*.mig)
TheGridTools(CreateMapInfoGridfromTableofObjectsandCreateMapInfoGridfromOtherGrid
Files)InMapInfoProfessionalallowyoutoconvertGridFilestoMapInfoProfessionalGrids(*.mig).
ThesetoolsconvertanygridfileforwhichthereisagridhandlerpresentwiththeoutputbeinginMapInfo
Professional(*.mig)format.Youcanapplyreliefshadingfromauser-specifiablevirtuallightsourceand
controlthecolorinflectionvalues.Thecolorfilesaresimpletextfilesthatyoucanedittospecifythe
colorinflectionvaluesbyspecificvalueorasapercentageoftherangeofdatavalues.Youcanopen
anddisplaythenewgridaftertheconversion.
• Forspecificinstructions,seeConvertingGridFilestoMapInfoProfessionalGridsandSpecifying
InflectionValueswiththeMapInfoProfessionalGridConverterintheHelpSystem.
AdjustingtheTranslucencyofaGridThematicMap
TheTranslucencyslidercontrolintheModifyThematicMapdialogboxallowsyoutocontrolthe
percentagethatlayersshowthroughrasterimages.Atranslucentimageallowsyoutopartiallysee
throughtheimage.Translucentimagescanbelayeredontopofotherlayerssothatthelowerlayers
arepartiallyvisiblethroughtheimage.
TheGridAppearancedialogboxallowsyoutospecifycolorinflectiondistributionoptionsfor
gridmaps.
Note:
• Forspecificinstructions,seeAdjustingtheTranslucencyofaGridThematicMapintheHelpSystem.
Working with Seamless Layers
Useorcreateaseamlessmaplayertotreatagroupofbasetablesasiftheywereone.Aseamless
layerallowsyoutochangedisplayattributes,applyorchangelabelingorusetheLayerControlwindow
foranentiregroupoftablesatonce.YoucanalsoretrieveinformationusingtheInfotool,andselector
browseanyoneofthelayer'sbasetables.AbasetablecanbeanyregularMapInfoProfessionaltable.
Gridlayerscannotbemadeseamless.
Thisfeatureisespeciallyusefulwhenyouwanttodisplayavectororrasterbackdropforyourmaps
suchasjoiningstreetorboundarymaps.Forexample,youmayhaveaseamlesslayerofcounty
boundariesmadeupofseveralindividualcountytables.
Whenzoominginonaseamlesslayer,MapInfoProfessionalonlyopensdatafordisplayingthemapat
thespecificzoomlevel-onlythosecomponenttablesondisplayopen.Ifyouchangethezoomlevel,then
MapInfoProfessionalanalyzeswhichtilestoopenandwhichtilestoclose,anddoesnotcachethedata.
Specificrasterhandlersopenrasterimages,whichareusuallyslowerthanvectortables.
FeaturesAvailablewithSeamlessLayers
Sinceaseamlesslayerisactuallymadeupofseveralbasetables,MapInfoProfessionaldoestreatita
littledifferentlythanaregularMapInfoProfessionaltable.YoucanusethefollowingMapInfoProfessional
featureswithaseamlessmaplayer:
• LayerControl-UseanyofthefunctionsexceptThematicMappingfromtheLayerControlwindow
onyourseamlesslayer.Add,remove,orreorderlayersorsetdisplay,zoomlayeringorlabeloptions
fortheseamlesslayer(allbasetables)atonetime.However,youcannotmakeaseamlesslayer
editable.
• InfoTool-Retrieveinformationaboutaparticularobjectinabasetable.
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Chapter3:TheBasicsofMapInfoProfessional
• SelectTools-Selectobjectsfromtheseamlesslayer.Youcanonlyselectagroupofobjectsifthey
resideinthesamebasetable.PresstheShift
keywhileclickingtheSelectTooltodoso.Ifyouattempt
toselectseveralobjectsthatresideindifferentbasetables,MapInfoProfessionalwillonlyselect
objectsinonebasetable.IfyouusetheMarqueeorRadiusselecttoolsandtheselectedareaspreads
acrosstwodifferentbasetables,MapInfoProfessionalselectsthetableineitherthecenterofthecircle
orpolygon.
• BrowseTable-DisplayaBrowserwindowofaparticularseamlesstable.Youarepromptedtoselect
abasetable.
TurningSeamlessLayersOnandOff
Ifyouneedtoeditthestructureofyourseamlesslayer,youwillneedtoturnyourseamlesslayeroff.
Toturnyourseamlesslayeroff:
1. ChooseOptions>ShowMapBasicWindow.TheMapBasicWindowdisplays.
2. Typesettable"tablename"seamlessoff.MapInfoProfessionalturnsofftheseamlesslayer.
3. DisplaythetableinaBrowsertovieworedititstablestructure.Ifyoueditthetablestructure,you
willneedtorecompiletheseamlesslayer.
MapInfoProfessionalturnsofftheseamlesslayer.DisplaythetableinaBrowsertovieworedititstable
structure.UsetheSeamlessTableManagertoaddorcreateseamlesstables.
Toturntheseamlesslayeron:
1. ChooseOptions>ShowMapBasicWindow.TheMapBasicWindowdisplays.
2. Typesettable"tablename"seamlesson.MapInfoProfessionalturnstheseamlesslayeronagain.
OpeningaSeamlessMapLayer
MapInfoProfessionalincludessampleseamlessmapsoryoucancreateyourown.Someofthesedata
filesareavailableonthePitneyBowesSoftwareInc.websiteintheMapInfoProfessionalTutorialdata.
Werecommendyoudownloadthisdataforusewiththeseexamples.
Fromthemapinfo\tutorial\tut-usa\usa\dc\seamlessdirectory,choosedcmetrow.Aseamlessmap
layerofwaterareasinWashingtonDCdisplays.Noticeatfirstglancethattheseamlesslayerlookslike
anyotherMapInfoProfessionaltable.However,theDcmetrowseamlessmaplayerismadeupofthe
followingbasetables:
• VAARLIW.TAB(ArlingtonVirginiawaterareas)
• VAALEXW.TAB(AlexandriaVirginiawaterareas)
• DCWASHW.TAB(WashingtonDCwaterareas)
Todisplayasampleseamlessmap:
1. OntheFilemenu,pointtoOpen.
2. Fromthedatadirectory,chooseaseamlesslayer.
ThefollowingisanexampleofamaplayerofwaterareasinWashingtonDC.
MapInfoProfessional12.5
80
WorkingwithSeamlessLayers
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