How to Outline a Dynamic Shapefile?

Discussion created by chagan02 on Apr 17, 2012
Latest reply on Apr 17, 2012 by chagan02
Hey folks,

I have a shapefile that I have loaded in arcmap of some counties.  After a piece of python script runs, the counties are shaded to represent some data that was input into the python script.  What I would like to be able to do, is outline these counties instead of shading them.  Also, to clarify, I would like to be able to outline the outer extent only.  I know how to outline each county itself, but what I want is ONE outline for the whole region of selected counties. 

Attached is an image of what I'm looking at.  I want to be able to outline the whole set of red counties, not just each county.  Thoughts?