To promote the stability of existing land uses that conform with a comprehensive plan and to protect them from inharmonious influences and harmful intrusions;

To promote a harmonious, convenient, workable relationship among land uses;

To promote a safe, effective traffic circulation system;

To promote and protect the aesthetic quality of the city, by conserving and enhancing the taxable values of land and buildings throughout the city;

To secure safety from fire, panic, and other dangers;

To provide adequate light and air;

To encourage proper population densities and prevent the overcrowding of structures;

To provide adequate protection for community investments in water, sewerage, streets, schools, parks, and other community facilities;

To divide the city into zones or districts, restricting and regulating therein the location, erection, construction, reconstruction, alteration and use of buildings, structures and land for trade, industry, residence and other specific uses; to regulate the intensity of the use of lot areas, and to regulate and determine the area of open spaces surrounding such buildings, to establish building lines and locations of buildings designed for specified industrial, business, residential and other uses within such areas; to fix standards to which buildings or structures incompatible with the character of such districts, must conform to prevent additions to and alterations or remodeling of existing buildings or structures in such a way as to avoid the restrictions and limitations lawfully imposed hereunder, providing for the gradual elimination of nonconforming uses of land, buildings and structures.