The Zoning Ordinance for the Incorporated Area of the Town of Fountain Hills, Arizona, serves, among other things, to divide the area of said town into Zoning Districts appropriate for various classes of residential, business, recreational, and industrial uses; provide for adequate light, air, and adequate parking facilities; to provide for expediting traffic within the Zoning Districts; to establish the building setback lines, the percentage of a lot or parcel which may be covered by buildings, and the size of yards and other open spaces.