The purpose of this chapter is to promote the health,
safety, morals or general welfare of the community; to lessen congestion
in the streets; to secure safety from fire, panic and other dangers;
to provide adequate light and air; to prevent the overcrowding of
land; to avoid undue concentration of population; to facilitate the
adequate provision of transportation, water, sewerage, schools, parks
and other public requirements. The size of buildings and other structures,
the percentage of lot area that may be occupied, the size of yards,
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.