create line from shared polygon borders

Hi,

 

 

There may be several approaches. I would use the Intersector and the Tester after removing spikes and slivers.

 

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Intersector -> Tester (filter the line if "_overlapes" is greater than 1)

 

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Takashi

Intersector might be used.

 

I often find that this creates bad objects if used straight on the polygons..

 

 

U might consider:

 

 

SpatialRelator "touch" and test for related_canidates>0 to limit to touching polys. 

 

Then coerce the polys to (poly)lines.

 

Then LineOnLine overlayer (or Intersector).

 

test for overlaps.