Unless otherwise shown, the transect zone or special district boundaries shall be construed to coincide with the center lines of streets, alleys, parkways, waterways and the middle of track or tracks of railroads.

Where such boundaries are indicated as approximately following the property lines of parks or other publicly owned lands, such lines shall be construed to be such boundaries.

In all cases where a transect zone or special district boundary line is located not further than 15 feet away from a lot line of record, such boundary shall be construed to coincide with such lot line.

In all other cases, where dimensions are not shown on the Zoning Map, the location of boundaries shall be determined by the use of the scale appearing on such Map.

Where physical or cultural features on the ground are at variance with those shown on the official Zoning Map, or in other circumstances not covered in this chapter, the Land Use Board shall interpret the district boundaries.