Said districts are bounded as shown on the map entitled "Zoning Map of the Village of Depew,"[1] annexed hereto, made a part hereof and certified by the Village Clerk and with all explanatory matter thereon shall be deemed to be part of this chapter as though fully set forth herein. The Zoning Map shall show the effective date of this chapter and of each subsequent amendment to said map and shall be duly certified by the Village Clerk.