The city is hereby divided into districts, as shown on the official zoning map. The districts and their boundaries shall be as shown upon the map referred hereto and made a part of this article, said map being designated "official zoning map." Said map, and all notations, references, and other information shown thereon, shall' be a part of this article. If, in accordance with the provision of this article, changes are made in district boundaries or other matters portrayed on the official zoning map, such changes shall:

1.

Be entered on the map promptly after the amendment has been approved by the city council;

2.

Include the date of official action and a brief description of the nature of the change; and

3.

Be signed by the mayor and attested to by the city secretary. No amendment to this article which involves matters portrayed on the official zoning map shall become effective until after such change and entry have been made on said map.

The location and boundaries of the districts herein established are shown upon the official zoning map, which is hereby adopted and incorporated into and made a part of this article. All districts, areas, notations, references and other information shown upon the said zoning map are hereby made a part of this article.

In determining the location of zoning district boundaries on the map accompanying and made a part of these regulations, the following rules shall apply:

1.

Where district boundaries are indicated as approximately following lot lines, alleys, street or highway right-of-way lines, or extensions of such lines, such lines shall be construed to be boundary lines of the district.

2.

Where district boundaries are so indicated that they are approximately parallel to the centerlines or street lines of streets, or the centerlines or rights-of-way of highways, such district boundaries shall be construed as being parallel thereto and to such distance therefrom as indicated on the zoning map. If no distance is given, such dimension shall be determined by the use of the scale on said zoning map.

3.

Where district boundaries are shown on undivided property, the location shall be determined by the scale shown on the map unless dimensions are given on the map or in the ordinance governing the zone.

4.

Where physical features existing on the ground are at variance with those shown on the official zoning map, or in other circumstances not covered within the text, the city manager or his duly appointed representative shall interpret the district boundaries. Appeals shall be to the board of adjustments.