In order to classify, regulate and restrict the location of trades and industries and buildings designed for specific uses, to regulate and limit the intensity of the use of lot areas, and to regulate and determine the areas of yards and other open spaces surrounding such buildings, the City is hereby divided into classes or "districts." The districts shall be known as:

The boundaries of the districts are shown upon the map which is made a part of this Chapter, which map is designed as the "District Zoning Map." The District Zoning Map and all the notations, references and other information shown thereon are a part of this Chapter and have the same force and effect as if the District Zoning Map and all the notations, references and other information shown thereon were all fully set forth or described herein, the original of which District Zoning Map is properly attested and is on file with the Clerk of the City.

All territory which may hereafter be annexed to the City shall be considered as being in the "AG" Agricultural District, unless otherwise changed by ordinance.

Whenever any street, alley or other public way is vacated by official action of the City Board of Aldermen, the zoning district adjoining each side of such street, alley or public way shall be automatically extended to the center of such vacation, and all area included in the vacation shall then and henceforth be subject to all appropriate regulations of the extended district.

No building shall be erected or altered which would: