"An ordinance classifying, regulating and restricting the location of trades and industries and the location of buildings designed for specific uses; regulating and limiting the height and bulk of buildings hereafter erected or altered; regulating and determining the in-area of yards, courts and other spaces within and surrounding such buildings; establishing the boundaries of districts for the said purpose; establishing a board of appeals; providing for changes and amendments; and prescribed penalties for the violation of its provisions." (Page one).