The location and boundaries of the districts hereby established are set forth and indicated on a map entitled "Zoning Map," which map, properly identified and dated, is hereby adopted as a part of this chapter, insofar as it indicated said designations, locations and boundaries, and the same shall be deemed to be as much a part of this chapter as if the same were fully described herein. The Borough Secretary shall certify the Zoning Map as part of this chapter and keep it on file in his office.[1]