Streets or Alleys: Where a zoning boundary line is indicated as following a street or alley, the center lines of such streets or alleys shall be construed to be the boundaries of such zones.

Lot Lines: Where a zoning boundary line follows or coincides approximately with a lot line or property ownership line, it shall be construed as following the lot line or property ownership line.

Scale on Map: Where a zoning boundary line is not indicated as following a street or alley, and does not follow or coincide approximately with a lot line or property ownership line, the zoning boundary line shall be determined by the use of the scale designated on the zoning map.

Further Zoning Boundary Uncertainties: Where further uncertainty exists, the Planning Commission, upon receiving written application or upon its own motion, shall determine the location of the zoning boundary in question giving due consideration to the location indicated on the zoning map, the objectives of the Zoning Ordinance, the purposes set forth in the zoning district regulations, and any previous actions of the City Council or the Planning Commission.