District boundaries. The boundaries between districts are, unless otherwise indicated, either the center lines of streets, lanes, watercourses, rights-of-way of power lines, railroads and other public utilities, or such lines extended or parallel thereto; where the boundaries of a single district are indicated as including directly opposite sides of a street, lane, watercourse, right-of-way of power lines, railroad or other public utility, for any portion of its length, the district so indicated shall be construed to apply to the entire bed of such street, lane or watercourse or right-of-way of such utility line lying within such portion of its length; where uncertainty exists as to the location of any of said boundaries as shown on the Zoning Map, the following shall apply:
(1) Where a district boundary is indicated as approximately following the center line of a street, watercourse or right-of-way of a utility line, such center line shall be construed to be such boundary.
(2) Where a district boundary is indicated as approximately following a lot line or other property line, such lot line or other property line shall be construed to be such boundary.
(3) Where a district boundary divides a lot or runs through undivided property, the location of such boundary shall, unless specified by figures or dimensions on the Zoning Map, be determined by the use of the scale appearing on said map.