The Official Map shall be deemed conclusive with respect to the location and width of streets and public drainageways and the location and extent of flood control basins and public areas, whether or not such streets, ways, basins, or areas are improved or unimproved or are in actual physical existence. Upon receiving an application for development, the Township may reserve for future public use the aforesaid streets, ways, basins, and areas in the manner provided in this chapter.