I have a shapefile that contains several polygons which in fact represent the limits of several counties. My task is to find each length of each shared border. So in other words I want to know how many km of border share the A county with the B county and so on. Of course I am looking for a tool to do this automatically. Measuring them manually would take ages. I envision some sort of matrix, but not sure how to do that in ArcGIS.
I use ArcGIS Desktop 10.0 (ArcEditor) .