A. Zone boundaries. Zone boundaries that are shown crossing lots are usually based on a topographic feature or a set measurement from a property line or topographic feature, such as the top of slope or stream bank or middle of a stream. When zone boundaries are shown crossing properties with no clear indication of the basis for the line, exact distances are to be determined by scaling the distances from the Official Zoning Maps, using the center of the zoning line.

B. Calculating Slope from a Topographic Map. See VMC 20.740.130.