Location of Districts. Said districts herein before referred to are located as shown on a map of the Town of Dedham Mass. Geographic Information System Map, prepared for the Dedham Planning Board, signed by the Planning Board by the Town of Dedham Engineering Department Geographic Information System Division at a scale of one inch equals 750 feet dated January 26, 2012, and filed in the office of the Town Clerk which map, together with detailed sketches, Appendix A, and all notations thereon, is hereby incorporated in and made a part of this Bylaw. A vote of the Town adding or deleting zoning districts or changing their boundaries made in the form of a verbal description shall be incorporated in this Bylaw in graphic form by addition to or alteration of the Zoning Map, but any delay or error in the revision of the Zoning Map shall not postpone or otherwise affect the effectiveness of an amendment. The Planning Board may from time to time add new streets and other geographical features to the Zoning Map to keep it reasonably current and to facilitate orientation, but no changes shall be made of the zoning districts, except pursuant to a vote of the Town.