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Vector Data AnalysisIntroductionBufferingMap OverlayFeature Type and Map OverlayMap Overlay MethodsSlide 7SliversError Propagation in Map OverlayDistance MeasurementMap ManipulationSlide 12Vector Data Vector Data AnalysisAnalysisChapter 10Chapter 10IntroductionIntroductionVaries with disciplineVaries with disciplineRaster vs vector ongoing questionRaster vs vector ongoing questionBufferingBufferingProximityProximityBuffer points, lines, polygonsBuffer points, lines, polygonsCan have varied buffer based on dataCan have varied buffer based on dataExamplesExamplesRingsRingsDissolved buffersDissolved buffersAnalysis techniqueAnalysis techniqueMap OverlayMap OverlayMap overlay combines the geometry and Map overlay combines the geometry and attributes of two feature maps to create attributes of two feature maps to create the output.the output.Input and overlay.Input and overlay.Must be same coordinate system and Must be same coordinate system and zone, same datum.zone, same datum.Multiple combinations as a process.Multiple combinations as a process.Feature Type and Map Feature Type and Map OverlayOverlayPoint-in-polygonPoint-in-polygonLine-in-polygonLine-in-polygonPolygon-on-polygonPolygon-on-polygonMap Overlay MethodsMap Overlay MethodsOur old friends UNION, INTERSECT and Our old friends UNION, INTERSECT and IDENTITYIDENTITYUNION preserves all map features from UNION preserves all map features from both the input and overlay map. Logical both the input and overlay map. Logical OR.OR.INTERSECT preserve only those INTERSECT preserve only those features that are common to both input features that are common to both input and overlay map. Logical AND.and overlay map. Logical AND.Map Overlay MethodsMap Overlay MethodsIDENTITY preserves only map features IDENTITY preserves only map features that fall within the area of the input map. that fall within the area of the input map. Logical AND/OR. Input map AND Logical AND/OR. Input map AND overlay or input.overlay or input.SliversSliversSlivers and fuzzy tolerance.Slivers and fuzzy tolerance.Minimum mapping unit.Minimum mapping unit.Error Propagation in Map Error Propagation in Map OverlayOverlayPositionalPositionalIdentification Identification Error quantificationError quantificationDistance MeasurementDistance MeasurementClosest Closest ArcView = Assign Data by LocationArcView = Assign Data by LocationARC/INFO = NEAR and ARC/INFO = NEAR and POINTDISTANCEPOINTDISTANCEMap ManipulationMap ManipulationArcView uses GeoProcessing extension ArcView uses GeoProcessing extension to DISSOLVE, CLIP and MERGEto DISSOLVE, CLIP and MERGEDISSOLVE is simplificationDISSOLVE is simplificationCLIP is cookie cutterCLIP is cookie cutterMERGE combinesMERGE combinesMap ManipulationMap ManipulationARC/INFO uses RESELECT, ELIMINATE, ARC/INFO uses RESELECT, ELIMINATE, UPDATE, ERASE, and SPLITUPDATE, ERASE, and SPLITIn addition to DISSOLVE, CLIP, MERGEIn addition to DISSOLVE, CLIP, MERGERESELECT creates new coverage based on logical RESELECT creates new coverage based on logical expressionexpressionELIMINATE creates new coverage by removing ELIMINATE creates new coverage by removing features defined by logical expressionfeatures defined by logical expressionUPDATE is cut and pasteUPDATE is cut and pasteERASE removes features within erase coverageERASE removes features within erase coverageSPLIT is opposite of merge, breaking into two or SPLIT is opposite of merge, breaking into two or


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UT GRG 360G - Chapter 10-Vector Data Analysis

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