1.   A map showing the boundaries of all current zoning districts within the entire corporate boundaries of the city shall be maintained in the office of the City Clerk, if a zoning ordinance is in effect within said municipality.
   2.   This map shall reflect all current zoning ordinance provisions (see Chapter 15 of this code of ordinances) and all current ordinances rezoning land, and shall represent the official zoning districts map for the city.
   3.   This map may be combined with the official map of the corporate limits of the city. (See Article 2 of this Chapter 20.)
   4.   This map shall be available for public inspection.