For the purpose of this ordinance the City of Franklin is hereby divided into the following districts:

The term "R district," as used hereinafter, means the "R-O," "R-1," "R-2" and "R-3" districts. "B district" means the "B-1", "B-2" and "B-3" districts. "M district" means "M-1" and "M-2" districts.

The boundaries of the several districts are hereby established as shown on the zoning district map which accompanies and is hereby made a part of this ordinance.[1] The boundaries of said districts are intended to follow lot lines, other property lines, or the center lines of streets or alleys (existing or projected), all as they existed at the time of passage of this ordinance; except that where a district boundary clearly does not follow any such line and is not otherwise identified, it shall be located by a graduated measure or rule. Any question as to the location of a boundary shall be determined by the board of appeals as provided in article XXVII.

In case any territory has not specifically been included within one district or another, or may hereafter become a part of the incorporated area of Franklin by annexation or otherwise, such territory shall automatically be classified in the RC district until reclassified as provided herein.