Where uncertainty exists as to the boundaries of districts as shown on the Official Zoning Map, the following rules shall apply:
1. Boundaries indicated as approximately following the centerlines of streets, highways, or alleys shall be construed to follow such centerlines.
2. Boundaries indicated as approximately following platted lot lines shall be construed as following such lot lines.
3. Boundaries indicated as approximately following City limits shall be construed as following such City limits.
4. Boundaries indicated as following shorelines shall be construed to follow such shorelines, and in the event of change in the shoreline shall be construed as moving with the actual shoreline; boundaries indicated as approximately following the centerlines of streams, rivers, or other bodies of water shall be construed to follow such centerlines.
5. Boundaries indicated as parallel to or extensions of features indicated in Subsections 1 through 3 above shall be so construed. Distances not specifically indicated on the Official Zoning Map shall be determined by the scale of the map.
6. Where physical or cultural features existing on the ground are at variance with those shown on the Official Zoning Map, or in other circumstances not covered in the previous section by Subsections 1 through 5 above, the Board of Adjustment shall interpret the district boundaries.
7. Where a district boundary line divides a lot that was in single ownership at the time of adoption of the zoning ordinance, the Board of Adjustment may permit, as a special exception, the extension of the regulations for either portion of the lot, not to exceed 50 feet beyond the district line into the remaining portion of the lot.
8. Whenever the City Council vacates and disposes of a street or alley, adjacent districts shall extend to the centerline of the vacation.
9. Whenever a variance exists between the Official Zoning Map and the legal description on an amendment to this chapter, the legal description applies.