The names of streets and avenues as given and shown on the map of the City adopted by the City Council on February 25, 1957, and on file in the office of the City Clerk, or as may hereafter be renamed by said Council, are hereby declared to be the names of the same. Names of all streets and avenues hereafter dedicated shall be approved by the City Council. (1958 Code, ch. IV, art. 1)