Where uncertainty exists with respect to the precise location of any of the aforesaid districts shown on the Zoning Map, the following rules shall apply:

   1.   Boundaries shown as following or approximately following streets, highways, or alleys shall be construed to follow the centerlines of such streets, highways, or alleys.

   2.   Boundaries shown as following or approximately following platted lot lines or other property lines shall be construed to follow said boundary lines.

   3.   Boundaries shown as following or approximately following railroad lines shall be construed to lie midway between the main tracks of such railroad lines.

   4.   Boundaries shown as following or approximately following the center lines of streams, rivers, or other continuously flowing water courses shall be construed as following the channel centerline of such water courses taken at a mean low water mark.

   5.   Boundaries shown as following or closely following the City limits shall be construed as following such City limit lines.

   6.   Boundaries indicated as parallel to or extensions of features indicated in subsections 1 through 6 of this section shall be so construed.  Distances not specifically indicated on the Official Zoning Map shall be determined by the scale of the map.

   7.   Where physical or cultural features existing on the ground are at variance with those shown on the Official Zoning Map, the Board of Adjustment shall interpret the district boundaries.

   8.   Whenever any street, alley, or other public easement is vacated, the district classification of the property to which the vacated portions of land accrue shall become the classifications of the vacated land.