In determining the boundaries of districts, and establishing the regulations applicable to each district, due and careful consideration has been given to existing conditions, the character of buildings erected in each district, the most desirable use for which the land in each district may be adapted and the conservation of property values throughout the City and its environs.
Where uncertainty exists as to the exact boundaries of any district as shown on the Zone Map, the following rules shall apply;
(a) In unsubdivided areas, or where a district boundary subdivides a lot, the exact location of the boundary shall be determined by use of the scale of the Zone Map.
(b) In the case of further uncertainty, the Board of Zoning Appeals shall interpret the intent of the Zone Map as to the location of the boundary in question.
(1969 Code §27-5)