topic Re: Problems with ITopologicalOperator Cut in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/problems-with-itopologicaloperator-cut/m-p/631791#M17044 <HTML><HEAD></HEAD><BODY><SPAN>Is the spatial reference for the polyline feature class the same as the public map?&nbsp; Because when you saved the output to the feature class, it get snapped to the spatial reference of the feature class.</SPAN><BR /><BR /><SPAN>One thing you can check is that after cutting, run the selection on the out put polylines before saving to the feature class and see whether or not the results ok.</SPAN></BODY></HTML> Thu, 31 Jan 2013 16:01:25 GMT WeifengHe 2013-01-31T16:01:25Z Problems with ITopologicalOperator Cut https://community.esri.com/t5/arcobjects-sdk-questions/problems-with-itopologicaloperator-cut/m-p/631790#M17043 <HTML><HEAD></HEAD><BODY><SPAN>I'm thoroughly baffled!&nbsp; I'm using ITopologicalOperator.Cut to cut polyline road segments that cross polyline boundaries.</SPAN><BR /><BR /><PRE class="plain" name="code"> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; While Not pFeature Is Nothing &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pCuttingPolygonBoundary = ConvertPolygonToPolyline(pFeature.Shape) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If pCuttingPolygonBoundary.SpatialReference Is Nothing Then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pCuttingPolygonBoundary.SpatialReference = pPublicMap.SpatialReference &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; End If &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pCuttingPolygonBoundary.SnapToSpatialReference() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pTopoOp = pCuttingPolygonBoundary &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pTopoOp.IsKnownSimple_2 = False &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pTopoOp.Simplify() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pSF = New SpatialFilter &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pSF.Geometry = pCuttingPolygonBoundary &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pSF.GeometryField = m_OutputFeatureClass.ShapeFieldName &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pSF.SpatialRel = esriSpatialRelEnum.esriSpatialRelCrosses &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pPolylineFeatureCursor = m_OutputFeatureClass.Search(pSF, False) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pPolylineFeature = pPolylineFeatureCursor.NextFeature() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; sOIDList = "" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; While Not pPolylineFeature Is Nothing &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pLeftPolyline = New Polyline &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pRightPolyline = New Polyline &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pPolyline = pPolylineFeature.ShapeCopy &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If pPolyline.SpatialReference Is Nothing Then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pPolyline.SpatialReference = pPublicMap.SpatialReference &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; End If &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pPolyline.Project(pCuttingPolygonBoundary.SpatialReference) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pPolyline.SnapToSpatialReference() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pTopoOp = pPolyline &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pTopoOp.IsKnownSimple_2 = False &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pTopoOp.Simplify() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pTopoOp.Cut(pCuttingPolygonBoundary, pLeftPolyline, pRightPolyline) </PRE><DIV style="display:none;"> </DIV><BR /><BR /><SPAN>I then put the resulting left and right polylines into the featureclass and delete the original polyline.&nbsp; 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.&nbsp; Its my understanding that the split lines no longer cross the boundary put simply touch it.</SPAN><BR /><BR /><SPAN>Is there something I'm missing?</SPAN></BODY></HTML> Wed, 30 Jan 2013 20:40:59 GMT https://community.esri.com/t5/arcobjects-sdk-questions/problems-with-itopologicaloperator-cut/m-p/631790#M17043 JeremySury 2013-01-30T20:40:59Z Re: Problems with ITopologicalOperator Cut https://community.esri.com/t5/arcobjects-sdk-questions/problems-with-itopologicaloperator-cut/m-p/631791#M17044 <HTML><HEAD></HEAD><BODY><SPAN>Is the spatial reference for the polyline feature class the same as the public map?&nbsp; Because when you saved the output to the feature class, it get snapped to the spatial reference of the feature class.</SPAN><BR /><BR /><SPAN>One thing you can check is that after cutting, run the selection on the out put polylines before saving to the feature class and see whether or not the results ok.</SPAN></BODY></HTML> Thu, 31 Jan 2013 16:01:25 GMT https://community.esri.com/t5/arcobjects-sdk-questions/problems-with-itopologicaloperator-cut/m-p/631791#M17044 WeifengHe 2013-01-31T16:01:25Z