It is also the purpose of this chapter to state as clearly and simply as possible the intended requirements to encourage wide understanding of its meaning, and to avoid costly technical and legal problems. For the purposes hereinabove mentioned, this chapter designates, regulates and restricts the location and use of buildings and structures and land for residents, commerce, trade, industry and other purposes; the height and number of stories and size of buildings and other structures hereinafter erected or altered; regulates and determines the sizes of yards and other open spaces; and regulates and limits the density of population. In order to effect its purpose this chapter divides the Borough into zoning districts of such number, shape and area as may be deemed the best to carry out the purposes of this chapter.