An ordinance to regulate the use of land, natural resources and structures; to regulate structures designed for trade, industry, residence or other specified uses; to regulate and limit the height, the area, the size and location of structures hereinafter to be erected or altered; to regulate and determine the area of yards, court, or other open spaces; to control congestion in the streets, to secure safety in case of fire, to prevent the overcrowding of land, to bring about the gradual conformity of the uses of land and buildings and for such purposes to divide the city into districts and zones, to establish appeal procedures; to provide for the administration and enforcement of the provisions of this ordinance and to prescribe penalties for the violation thereof.