The boundaries of the districts are shown upon the map which is made a part of this chapter and is designated as the "district map." The district map and all the notations, references and other information shown thereon are part of this chapter and have the same force and effect as if the district map and all the notations, references and other information shown thereon were all fully set forth or described in this section, which district map is properly attested and is on file with the clerk of the city. (Prior code § 11-2-2)