Where uncertainty exists with respect to the boundaries of the various districts as shown on the District Map, the following rules shall apply:

1.    Where a boundary is given a position within a street, alley, or nonnavigable stream, it shall be deemed to be in the center of the street, alley, or stream, and if the actual location of such street, alley, or stream varies slightly from the location as shown on the District Map, then the actual location shall control.

2.    Where a boundary line is shown as being located a specific distance from a street line or other physical feature, this distance shall control.

3.    Where a boundary line is shown adjoining or coincident with a railroad, it shall be deemed to be in the center of the railroad right-of-way and distances measured from a railroad shall be measured from the center of the designated main line track.

4.    Where the district boundaries follow or approximately follow platted lot lines or other property lines, the district boundaries shall be construed to follow the platted lot lines or other property lines.

5.    In unsubdivided property, unless otherwise indicated, the district boundary line shall be determined by the use of the scale contained on such map.