For these purposes, this chapter designates, regulates and restricts the use of buildings, structures and land for agriculture, residence, commerce, trade or other purposes; regulates the height, number of stories and size of buildings or other structures hereinafter erected or altered; regulates and determines the size of yards and other open spaces; and regulates and limits the density of population. In order to effect these purposes, this chapter divides the Township into zones and districts of such number, shape and area as may be deemed best to carry out the purposes of this chapter.