Vector Data AnalysisIntroductionBufferingMap OverlayFeature Type and Map OverlayMap Overlay MethodsSlide 7SliversError Propagation in Map OverlayDistance MeasurementMap ManipulationSlide 12Vector Data Vector Data AnalysisAnalysisChapter 10Chapter 10IntroductionIntroductionVaries with disciplineVaries with disciplineRaster vs vector ongoing questionRaster vs vector ongoing questionBufferingBufferingProximityProximityBuffer points, lines, polygonsBuffer points, lines, polygonsCan have varied buffer based on dataCan have varied buffer based on dataExamplesExamplesRingsRingsDissolved buffersDissolved buffersAnalysis techniqueAnalysis techniqueMap OverlayMap OverlayMap 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 OverlayOverlayPoint-in-polygonPoint-in-polygonLine-in-polygonLine-in-polygonPolygon-on-polygonPolygon-on-polygonMap Overlay MethodsMap Overlay MethodsOur old friends UNION, INTERSECT and Our old friends UNION, INTERSECT and IDENTITYIDENTITYUNION 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 MethodsIDENTITY 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.SliversSliversSlivers and fuzzy tolerance.Slivers and fuzzy tolerance.Minimum mapping unit.Minimum mapping unit.Error Propagation in Map Error Propagation in Map OverlayOverlayPositionalPositionalIdentification Identification Error quantificationError quantificationDistance MeasurementDistance MeasurementClosest Closest ArcView = Assign Data by LocationArcView = Assign Data by LocationARC/INFO = NEAR and ARC/INFO = NEAR and POINTDISTANCEPOINTDISTANCEMap ManipulationMap ManipulationArcView uses GeoProcessing extension ArcView uses GeoProcessing extension to DISSOLVE, CLIP and MERGEto DISSOLVE, CLIP and MERGEDISSOLVE is simplificationDISSOLVE is simplificationCLIP is cookie cutterCLIP is cookie cutterMERGE combinesMERGE combinesMap ManipulationMap ManipulationARC/INFO uses RESELECT, ELIMINATE, ARC/INFO uses RESELECT, ELIMINATE, UPDATE, ERASE, and SPLITUPDATE, ERASE, and SPLITIn addition to DISSOLVE, CLIP, MERGEIn addition to DISSOLVE, CLIP, MERGERESELECT creates new coverage based on logical RESELECT creates new coverage based on logical expressionexpressionELIMINATE creates new coverage by removing ELIMINATE creates new coverage by removing features defined by logical expressionfeatures defined by logical expressionUPDATE is cut and pasteUPDATE is cut and pasteERASE removes features within erase coverageERASE removes features within erase coverageSPLIT is opposite of merge, breaking into two or SPLIT is opposite of merge, breaking into two or
View Full Document