Boundary Lines within Public or Private Ways. Where the boundary line (or portion of a boundary line) of a zoning district is shown on the Map within the street line of a public or private way, the center line of such public or private way shall be the boundary line.

Boundary Lines Shown Approximately. Where the boundary line or portion of a boundary line of a zoning district is shown approximately on the location of a property or lot line, and the exact location of the property, lot, or boundary line is not indicated by means of dimensions shown in figures, then the property or lot line existing at the time of adoption of these Bylaws shall be the boundary line.

Boundary Lines Outside Public or Private Ways. A boundary line (or portion of a boundary line) of a zoning district located outside of a street line and shown to be approximately parallel to the street line shall be regarded as parallel to such street line, and any dimensions shown in figures on the Map between such boundary line and the street line shall be regarded as the distance in feet between such boundary lines and the street line, with the distance being measured at right angles to the street line unless otherwise indicated.

Location of Other Boundary Lines. In all cases which are not covered by other provisions of this Section, the location of boundary lines shall be determined by the distance in feet, if given, from other lines upon the Zoning Map, by the use of identifications as shown on the Zoning Map, or by the scale of the Zoning Map.

Lot Split by District Lines. Where a district boundary line between a residential, commercial, or industrial district divides any lot existing at the time such line is adopted, the regulations for the less restricted portion of such lot shall extend no more than 50 feet into the more restricted portion, provided the lot has frontage on a public way in the less restricted district.