Lot lines. Where district boundaries are so indicated that they approximately follow the lot lines, such lot lines shall be construed as such boundaries.

Street center lines. Where district boundaries are indicated as approximately following the center lines of streets or highways, street lines or highway right-of-way lines shall be construed to be boundaries.

Center lines extended. Where district boundaries are so indicated that they are approximately parallel to or extensions of the center lines or street lines of streets, or the center lines or right-of-way lines of highways, such district boundaries shall be construed as being parallel thereto or extensions thereof and at such distance therefrom as indicated on the Zoning Map. If no distance is given, such dimension shall be determined by the use of the scale shown on the Zoning Map.

Water bodies and railroad rights-of-way. Where the boundary of a district follows a water body or railroad line, the boundary shall be deemed to be located midway between the shores of the water body or the main tracks of the railroad line.

Lot divisions. Where a district boundary divides a lot which was in single ownership at the time of enactment of this chapter, the use authorized thereon and the other district requirements applying to the most restricted portion of such lot under this chapter shall be construed as extending to the entire lot, except when the Administrator defines the boundary by dimension in writing upon request by the owner. This provision shall not pertain to floodplain overlay districts.

Vacations. Whenever any street, alley or other public way is vacated by official action, the zoning district adjoining such public way shall be extended automatically to include all land attached by reversion to the center line thereof, and it shall be subject to all regulations of the extended district or districts.

Administrative interpretations. Where physical or cultural features existing on the ground are at variance with those shown on the Zoning Map, or where due to scale, lack of detail or illegibility there is any uncertainty, contradiction, or conflict as to the intended location of any district boundaries or in other circumstances not covered above, the Administrator shall interpret the district boundaries.