The words "amend," "amendment," "amendments" or "amended" in this chapter shall be deemed to include any modifications of the text or phraseology of any provisions or amendments thereof, or any repeal or elimination of any such provisions or part thereof, or any addition to this chapter or to an amendment thereof, and shall also be deemed to include any change in the number, shape, boundary, or area of any district or districts, any repeal or abolition of any part of such map and, in addition to such map, any new map or maps or any other changes in the maps or any map.