Overlapping line segments are not being dissolved in the Polygon To Line tool.
Last Published: July 29, 2015ArcGIS for Desktop
Bug ID Number
January 27, 2015
November 24, 2020
ArcGIS for Desktop
Operating System Version
Will Not Be Addressed
The development team has considered the issue or request and concluded it will not be addressed. The issue's Additional Information section may contain further explanation.
The tool works as designed and as documented. The 6 polygons not only share borders among themselves, but
also overlap and share some borders with the larger polygon. The tool reference states:
"If a polygon overlaps another polygon, two output lines will be generated representing each crossing boundary
twice: the first line will represent the outer boundary of one of the overlapping polygons, therefore, its LEFT_FID
is the feature ID of the polygon it crosses and its RIGHT_FID will be its own polygon feature ID; the second line will
be in the opposite direction, splitting the other polygon, therefore, its LEFT_FID and RIGHT_FID will be the same as
the other polygon feature ID."
So the result of PolygonToLine is correct
Use the Feature To Line tool without preserving the attributes.