The boundaries of such districts are established as shown upon the Map which is designated as the Building Zone Map which accompanies and is made a part of the Zoning Ordinance; and such Map and all notations, references and other information shown thereon shall be as much a part of the Zoning Ordinance as if the matters and information set forth by the Map were fully written and described herein. Except as hereinafter provided no building or structure shall be erected or altered, nor shall any building or premises be used for any purpose other than a use permitted in the district in which such building, structure or premises are located. (Ord. 545-47. Passed 10-20-47.)