In the case of a previous survey having mistakenly established the property line 15' off the center of the road, simply using the center as it should have been for the new survey could result in an incorrect subtraction by the Commissioner's office or Assessor's office when cuts are made.  Showing the total area to the center line with a notation that the prescriptive easement contains (X) portion of that total could help these officials understand why a tract that once contained 10 acres suddenly contains two- 5.2 acre parcels.