Where uncertainty exists as to the boundary of any district, the following rules shall apply:
(A) Whenever the district boundary is indicated as being approximately upon the centerline of a street, alley or block, or along a property line, then, unless otherwise definitely indicated on the map, the center line of such street, alley or block or such property line, shall be construed to be the boundary of such district.
(B) When the application of the above rules does not clarify the zone boundary location, the Planning Commission shall interpret the map.
(`67 Code, § 10-2-6)