I'm thoroughly baffled! I'm using ITopologicalOperator.Cut to cut polyline road segments that cross polyline boundaries.
I then put the resulting left and right polylines into the featureclass and delete the original polyline. It seems to work however when I do a spatial selection using the crossed by the outline selection method some of the polylines are still selected. Its my understanding that the split lines no longer cross the boundary put simply touch it.
Is there something I'm missing?
Code:
While Not pFeature Is Nothing
pCuttingPolygonBoundary = ConvertPolygonToPolyline(pFeature.Shape)
If pCuttingPolygonBoundary.SpatialReference Is Nothing Then
pCuttingPolygonBoundary.SpatialReference = pPublicMap.SpatialReference
End If
pCuttingPolygonBoundary.SnapToSpatialReference()
pTopoOp = pCuttingPolygonBoundary
pTopoOp.IsKnownSimple_2 = False
pTopoOp.Simplify()
pSF = New SpatialFilter
pSF.Geometry = pCuttingPolygonBoundary
pSF.GeometryField = m_OutputFeatureClass.ShapeFieldName
pSF.SpatialRel = esriSpatialRelEnum.esriSpatialRelCrosses
pPolylineFeatureCursor = m_OutputFeatureClass.Search(pSF, False)
pPolylineFeature = pPolylineFeatureCursor.NextFeature()
sOIDList = ""
While Not pPolylineFeature Is Nothing
pLeftPolyline = New Polyline
pRightPolyline = New Polyline
pPolyline = pPolylineFeature.ShapeCopy
If pPolyline.SpatialReference Is Nothing Then
pPolyline.SpatialReference = pPublicMap.SpatialReference
End If
pPolyline.Project(pCuttingPolygonBoundary.SpatialReference)
pPolyline.SnapToSpatialReference()
pTopoOp = pPolyline
pTopoOp.IsKnownSimple_2 = False
pTopoOp.Simplify()
pTopoOp.Cut(pCuttingPolygonBoundary, pLeftPolyline, pRightPolyline)Is there something I'm missing?