In the event the official city map becomes damaged, destroyed, lost or difficult to interpret because of the nature or number of changes and additions, the city council may by resolution adopt a new official city map which shall supersede the prior official city map. The new official city map may correct drafting or other errors or omissions in the prior official city map, but no such correction shall have the effect of amending the original plot of the city on file in the office of the Secretary of State together with plots showing annexations to or disconnections from the city since that time. The new official city map shall be certified by the signature of the city engineer, signed by the mayor and attested by the city clerk. Unless the prior official city map has been lost or has been totally destroyed, the prior map or any significant parts thereof remaining shall be preserved, together with all available records pertaining to its certification and amendments. (Prior code § 1-2-3)