For the purpose of promoting health, safety and the general welfare of the Town of Lysander and to lessen congestion in the streets, to secure safety from fire, panic and other dangers, to provide adequate light and air, to avoid undue concentration of population and to facilitate the adequate provision of transportation, water, sewage, schools, parks and other requirements under and pursuant to Article 16 of Chapter 62 of the Consolidated Laws, the heights, number of stories and size of buildings and other structures, the percentage of the lot that may be occupied, the size of yards and other open spaces, the density of population and the use of buildings, structures and land for trade, industry, residence or other purposes are hereby restricted and regulated as hereinafter provided.