Boundaries indicated as approximately following the center lines of streets, highways, or alleys shall be construed as following such center lines.

Boundaries indicated as approximately following platted lot lines shall be construed as following such lot lines.

Boundaries indicated as approximately following Township lines shall be construed as following such Township limits.

Boundaries indicated as following railroad rights-of-way shall be construed as following the center line of such rights-of-way.

Boundaries indicated as approximately following the center lines of streams, rivers, lakes or other bodies of water, or waterways shall be construed as following such center lines.

Boundaries indicated as parallel to or extensions of features indicated in Subsections 20-4.7.1 through 20-4.7.5 above shall be so construed. Distances not specifically indicated on the zoning map shall be determined by the scale of the map.

Where physical or man-made features existing on the ground are at variance with those shown on the zoning map, or in other circumstances not covered by Subsections 20-4.7.1 through 20-4.7.5 above, the board of adjustment shall interpret the district boundaries.

Where more than 80% of a lot having an area of ten acres or less falls within one district the entire lot may be developed without a use variance as if it were all within the district within which the 80% falls. Where more than 80% of a lot having an area greater than ten acres falls within one district the permitted uses of the larger portion of the lot shall be deemed conditional uses in the smaller portion and the owner may apply to the Planning Board to approve use of the entire property for any use permitted on the larger portion thereof.