Connect polyline endpoints between features

JamesCrandall

Not sure how best to word this.  I am looking for arcpy solutions/ideas on connecting the endpoints of stacked polyine features together in order to build it into a polygon feature class.

This task done manually is quite simple: just add a new polyline(s) from one start point to the startpoint of the polyline below it and continue this until an entire "side" of the stacked polylines are connected.  Then it's just a matter of doing this same thing to the other "side" on the endpoints of each polyline feature.  See:

JamesCrandall

Thanks but I really am unintersted in model builder and need to implement this into a Python Add-In.  Here's what I came up with that works just fine:

 ptarrL = arcpy.Array()
ptarrR = arcpy.Array()

        for l in listoflayers:
            for lyr in arcpy.mapping.ListLayers(mxd):
                if lyr.name == str(l):
                    print "layer: " + str(lyr.name)
                    with arcpy.da.SearchCursor(lyr, ["SHAPE@"]) as lyrCur:
                        for row in lyrCur:
                            xL, yL = row[0].firstPoint.X,  row[0].firstPoint.Y
                            xR, yR = row[0].lastPoint.X, row[0].lastPoint.Y
                            ptarrL.add(arcpy.Point(xL, yL))
                            ptarrR.add(arcpy.Point(xR, yR))


                    with arcpy.da.InsertCursor(lyr, ["SHAPE@"]) as inscur:
                        polyline = arcpy.Polyline(ptarrL)
                        inscur.insertRow([polyline])
                    with arcpy.da.InsertCursor(lyr, ["SHAPE@"]) as inscur:
                        polyline = arcpy.Polyline(ptarrR)
                        inscur.insertRow([polyline])    
                    del inscur, lyrCur