3. ClickRangesandselectatemplatenamefromthelist.
Thisisthestyleofthethematicmapyouarecreating.
4. ClickNext.
TheCreateThematicMap-Step2of3wizardpanelopens.
5. ClickUSA,thisisthetableyouwanttoshade.
6. IntheFielddrop-downlist,selectJoin.
TheUpdateColumnforThematicdialogboxopens.
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TabletoUpdateisalreadysettoSTATESandColumntoUpdateisautomaticallysettoAddnew
temporarycolumn.
7. IntheGetValueFromTablebox,selectCITY_125.
Ifthatistheonlyothertableopen,MapInfoProfessionalautomaticallydisplaysitstitleinthelistbox.
Whenyoucreateatemporarycolumnforathematicmap,thefieldmustbeanumericfield.
Thisistrueforallthematicmapsexceptindividualvalues.
Note:
Sinceinourexample,wearelookingforthepercentageofthepopulationlivinginurbanareasinthe
UnitedStates,weneedtocalculatethetotaloftheCITY_125population;thatis,wemustcalculate
thetotalofthepopulationofeachcityinaeachstate.Weneedtoputthatsumintothetemporary
column.
8. IntheCalculatebox,chooseSum.
9. Intheofbox,chooseTot_pop.
ToputthedatafromtheCITY_125tableintothetemporarycolumnoftheSTATEStable,theremust
bealinkbetweenthetwotablesthatMapInfoProfessionalcanusetoaccessthedata.MapInfo
Professionalcanoftenmakethislinkautomatically.Inthisexample,bothourtableshaveaState
field.
10.ClickJoin.
TheSpecifyJoindialogboxopens.
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WhenyouchooseJoinintheUpdateColumnforThematicdialogbox,youcanseethatMapInfo
ProfessionalhasalreadysetuptheSpecifyJoindialogboxwiththeSTATEfieldsfrombothtables.
Ifthejoinwerenotcalculatedautomaticallyitwouldbenecessarytospecifythematchingfieldsor
geographicjoin.
11.ChooseOK.
MapInfoProfessionalcalculatesthesumandreturnsyoutotheThematic-Step2of3dialogbox.
TheFieldlistboxdisplaysthetemporarycolumnyoucreated:SumOfTot_pop.
However,beforewecreatethemap,westillneedtocalculatethepercentageofthetotalpopulation
ofeachstatethatisurban.Thatinformationdoesnotexistasafieldinthetable,soyoumustbuild
anexpressiontogenerateit.
12.IntheFielddrop-downlist,selectExpression.
TheExpressiondialogboxdisplays.
TheexpressionSumOfTot_pop/Pop_1990*100willgiveyoutheanswerasapercent.
13.Intheexpressionbox,type:
SumOfTot_pop/Pop_1990*100
14.ClickVerifytoensurethatyoursyntaxiscorrect,andthenchooseOK.
TheCreateThematic-Step2of3dialogboxshowstheexpressionyoucreated.
15.ClickNext.
TheCreateThematicMap-Step3of3wizardpanelopens.
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16.ClickRangesandchooseeitherEqualCountorEqualRangestocustomizetheranges,whichever
givesyouthebestrepresentationofyourdata.
UseRoundBytoroundtoadecimalplaceorwholenumber.Customizethestylestobestillustrate
youranalysisbyclickingtheStylesbutton.CustomizeyourmaplegendbyclickingtheLegend
button.
17.ClickOK
TheMapwindowredrawswithyourthematic.
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Fordetailsaboutusingpointorlineobjectstorepresentthematicvariables,seeBivariateThematic
MappingintheMapInfoProfessionalHelpSystem.
AddingTemporaryColumns
UseUpdateColumntoaddtemporarycolumnstoatablebyusingdatafromanothertable.
Toaddatemporarycolumn:
1. Openatleasttwotables.
2. ChooseTable>UpdateColumn.
TheUpdateColumndialogboxopens.
3. IntheTabletoUpdatelist,choosethetabletoaddthetemporarycolumnto.
4. IntheGetValuefromTablelist,choosethetablethatMapInfoProfessionalwillretrievetheupdate
informationfrom.
5. Toaddatemporarycolumn,selecttheAddnewtemporarycolumnoptionfromtheColumnto
Updatelist.
Ifnecessary,specifytheinformationMapInfoProfessionalwillneedtoassociatethedata(join)in
thetwotablesbyusingtheircommontabularorgraphicdata.
6. Choosehowtoproducethecolumndatabyspecifyinghowtocalculatetheinformationbasedon
columnsandexpressionsfromtheCalculateandoflists.
7. SelecttheBrowseResultscheckboxtodisplaythetablewithitsnewtemporarycolumninbrowser
format.
8. ClickOK.
Thetemporarycolumnisaddedbasedonthespecifiedinformation.
Whenyoumakechangestothedatatable,thenewtemporarycolumnisautomaticallyupdated.
Tosavethetablewithitsnewtemporarycolumns,useFile>SaveAs.Ifthetemporarycolumnsare
addedtoatableinaworkspace,thechangesareautomaticallysavedwhenyousavetheworkspace.
TheHelpSystemcontainsthefollowingtopicsaboutBivariateThematicMapping:
• TypesofBivariateMaps
• CreatingaTransparentBivariateLayer(RangedTheme)
• CreatingaTransparentBivariateLayer(IndividualValueTheme
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• SettingtheDefaultBehavioroftheReplaceLayerStyleCheckBox
• ExampleofBivariateThematicMapping
• UsinganInflectionPointtoShowDistinction
• ExampleofanInflectionPointMap
• ControllingtheNumberofInflectionValues
• ApplyingRoundingFactorstoInflectionValues
• SpreadingInflectionsbyEqualCellCount
Working with Grid Surface Maps
Thethematicmapswehavediscussedarebasedonvectorlayers.MapInfoProfessionaltakesthematic
mappingtoanewlevelwithamethodthatdisplaysdataascontinuouscolorgradationsacrossthemap.
Thistypeofthematicmapping,knownasgridmappingorsurfacethememapping,isproducedbyan
interpolatingpointdatafromthesourcetable.MapInfoProfessionalgeneratesagridfilefromthedata
interpolationanddisplaysitasarasterimageinaMapwindow.
GridthememapsareappropriateanalyticaltoolsintraditionalGISenvironmentsandotherindustries
wherethedatapointshavemeasuredvaluesthatreflectthoselocations.Forexample,usegridshading
toillustratetemperaturechanges,snowfallamounts,orchangeinelevation.
ThenextfigureshowsthelighttodarkgradualtransitionacrosstheUnitedStates,whichrepresentslow
tohighaverageannualtemperatures.Thecontinuousshadingallowsyoutoderivemeasurementsat
placesotherthanwheremeasurementsweretaken.
Figure:GridSurfaceThematicMap
GridImageFiles
Gridmappingproducesafiletypecalledagridimage.Whenyoucreateagridthematicmapusing
MapInfoProfessional'sgridhandler,MapInfoProfessionalgeneratesadefaultfilenameof
tablename_fieldnamewiththeextension.MIG(forexample,USELEV_ELEVFEET.MIG).IntheCreate
ThematicMap-Step2of3dialogboxMapInfoProfessionaldisplaysthepathandtherootfilename,
whereyoucanchangeitasnecessary.
MapInfoProfessionalcontainsoneread/writegridhandlerandaGridEnginetoolkitthatshowsyouhow
tocreateyourown.Onceyouhavewrittenagridengine,youplacethisfileinyourMapInfoProfessional
applicationdirectoryandsetthepreferenceintheMapWindowdialogbox.Specifically,tosetthedefault
gridwriteablehandler,gototheMapwindowpreferencesandspecifyyourgridhandlerfile.Theavailable
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handlerformatsdependonwhatgridhandlershavebeeninstalled.Changingthedefaultgridhandler
willchangethedefaultfileextensionofthegridfilename.
Gridfilesarestoredbydefaultinthedatadirectoryspecifiedasapreference.Gridfilescanbeopened
fromtheFilemenu,clickOpencommandlikeotherMapInfoProfessionalsupportedfiletypes.
Whenyouopenatablethathasagridfilenameassociatedwithit,MapInfoProfessionalsearchesfor
thefileifitcannotfinditimmediately.Forexample,thesearchcapabilitycansimplifyopeningtablesif
your.tabfilereferstoanimagethatresidesonaDVDdrive,anddifferentlettersareusedtodesignate
theDVDdriveondifferentsystems.
MapInfoProfessionalusesthefollowingsearchorder:
1. SearchforthefilewherespecifiedbytheFILEtaginthe.tabfile.
2. Searchforthefileinthesamedirectoryasthe.tabfile.
3. SearchforthefileintheTableSearchpathspecifiedintheDirectoriespreferences.
MapInfoProfessionaleitheropensthetableasthoughitfoundthefileinthespecifiedlocation,oritwill
reportanerrorbecausethefilecouldnotbefoundinanylocation.
WorkingwithGridHandlers
InadditiontotheMapInfoProfessionalread/writegridhandler(*.MIG)wealsosupplyREAD-ONLYgrid
handlerstosupportthedirectopeningofthefollowinggridfileformats:
• DEM-USGSASCII(*.DEM)
• DTED-levels1,2,and3(*.DT0,*.DT1,*.DT2)
• GTOPO30(*.DEM)
• MapInfoVerticalMapper(*.GRD,*.GRC)
YoucanopenthesegridfiletypesdirectlyfromtheOpendialogbox.Youwillseethefileextensions
listednexttotheGridImagefiletypeintheFilesofTypedrop-downlistinthebottomofthedialogbox.
Becausethehandlersareread-only,theycannotbeusedtocreategridfilesduringthethematicmapping
process.
Ifthereliefshadingoptionisenabled(intheCreateThematicMap-Step3of3wizardpanel,click
StylesandthenGridAppearance),aseparatefilewillbecreatedtostorethehillshadeinformation.
Thehillshadefileisstoredinthesamelocationasthegridfileandhasthesamebasenameasthegrid
butwiththeextension".MIH".Ifthegridfileisread-only,forexample,it'slocatedonaDVD,the.MIH
fileswillbecreatedinthesamelocationasthe.tabfile.The.tabfilewillcontainanewmetadatakey,
forexample:
"\Grid\Hillshade File" = "d:\tmp\AntiochSouth.MIH"
VerticalMapperGridHandler
MapInfoProfessionalalsoincludestheVerticalMapperGridhandlertoenableuserswhohavenot
purchasedthefullVerticalMapperadd-onproducttoopen,view,andprintVerticalMapperGrid(*.GRD,
*.GRC)formatfiles.
TheVerticalMapperGridfilescanalsobeopeneddirectlyinMapInfoProfessional.The*.GRDor*.GRC
extensionislistedwiththeotherGridImageformatsintheFilesofTypedrop-downlist.
Currently,gridsusingtheVerticalMapperhandlercannotbemodifiedintheModifyThematicMap
dialogbox.Theyareread-only.TheymustbecreatedormodifiedintheVerticalMappersource
application,whichisavailablefromPitneyBowesSoftwareInc..Inaddition,youcannotcreate.GRDor
.GRCfilesinMapInfoProfessional,however,youcanconvert*.GRDfilesto*.MIGfileswith
GRIDTOOLS.MBX.
TheHelpSystemcontainstheserelatedtopics:
• CreatingCustomRead/WriteGridHandlers
• IDWInterpolator
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• TINInterpolator
• GridAppearance
• InflectionMethods
• ReliefShading
• GridTranslucency
• FinalAdjustments
• ZoomLayering
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11
Buffering and Working with
Objects
TwoofthemostimportantfeaturesinMapInfoProfessionalarebuffersandthe
toolsweprovidetoworkwithobjects.Buffersallowyoutocreategroupingareas
aroundobjects,linesandregions,whichisimportantforprovidingavisualanalysis.
Youcaneditandmanipulateobjectsinawidevarietyofways.TheSetTarget
editingmodelallowsyoutoapplyawiderangeofeditingoperationstoanobject
oraseriesofobjects.UsingMapInfoProfessionalyoucanalsocreateterritories
andcreateobjects.Thischaptercoversthesetopicsanddiscussestheadvanced
topicsofenclosing,checking,andcleaningobjects.
Inthissection:
• Buffering Your Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290
• EditingObjectsusingtheSetTargetModel . . . . . . . . . .295
• CreatingTerritoriesbyCombiningObjects . . . . . . . . . .301
• CreatingandManipulatingObjects . . . . . . . . . . . . . . . . .304
Buffering Your Data
Ifyouwouldliketosearchforallundergroundcablewiresthatareburiedwithin440yardsofInterstate
490oryouwouldliketocontactallfamilieswithpre-schoolagechildrenwholivewithinfivemilesofa
proposedschooldistrict,bufferingisthetoolforyou.
UnderstandingBuffers
Abufferisaregionthatsurroundsalineobject,anotherregion,symbol,oranyotherobjectinaMap
window.Forexample,youcancreateabufferregionthatsurroundsInterstate90by440yardsoneither
side.Youcancreateabufferregionthatsurroundstheproposedschooldistrictbyfivemilesonall
borders.Boththe440yardsandfivemilesaretheirrespectiveregions'bufferradii.Thebuffertableis
thenjoinedtodataassociatedwiththeoriginalbufferedobjects.
Themaximumbufferresolutionis500segmentspercircle.Thisaffectstheentryyoucanmake
intheSmoothnessfieldoftheBufferObjectsdialogbox.
Note:
CreatingaBuffer
Tobufferobjects:
1. Selecttheobjectsthatyouwanttobuffer.MakesurethereisaneditablelayerintheMapwindow.
Theoutputbufferedobjectswillbeplacedinthatlayer.
Therearecertaintablevariablesthatyouneedtobeawareofthatwilldeterminethe
aggregationmethodusedinjoiningthetableofbufferstodataassociatedwiththeoriginal
objects.SeeTableVariablesforthisinformation.
Note:
2. OntheObjectsmenu,clickBuffer.TheBufferObjectsdialogboxdisplays.
3. Selectappropriatebufferradius,segmentspercircle,distancetypecalculationtouse,andbuffer
methodasdescribed.
• Radius-Theradiusisthewidthofthebufferyouwanttocreatearoundtheobjectyouselected.
TheValueandtheFromColumnradiobuttonsgiveyoudifferentwaystospecifythatwidth.
• Value-Typeavalueintothisfieldiftheradiusofthebufferyouwanttocreateisaspecificdistance.
Examplesmightinclude10feet,20kilometers,50chains.
• FromColumn-Selectthisradiobuttonifthebufferyouwanttocreateisspecifiedinaparticular
columnoristobecalculatedbyanexpression.ThenselectthecolumnorchooseExpression
fromthedrop-downlist.
• IfyouselectExpression,theExpressiondialogboxdisplays.Specifytheexpressionyouwant
MapInfoProfessionaltousetocalculatethebufferradiusandclickOKtoreturntotheBuffer
Objectsdialogbox.
• Units-Selecttheunitsforthebufferfromthisdrop-downlist.Optionsinclude:inches,links,feet,
USSurveyfeet,yards,rods,chains,miles,nauticalmiles,millimeters,centimeters,meters,
kilometers.
• Smoothness-Typethenumberofsegmentspercirclethatdeterminestheresolutionofthecurves
inthebufferpolygon.Youcanenteranumberbetween3and100.Thedefaultvalueis12segments
percircle.Ifmakingadjustments,avalueof24yieldsgoodresults.
• Themoresegmentsyouenter,thesmootherthecurve.Thefewersegments,themorejaggedthe
curve.Moresegmentsproduceasmoothercurve;fewersegmentsmakeamorejaggedcurve.
Creatingabufferistimeconsuming.Thehigherthesmoothness(moresegments),the
longerittakestocreateabuffer.
Note:
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