The boundaries of the Zoning Districts are indicated upon the Official Zoning Map of the City of Norwalk, Iowa, which is made a part of this ordinance by reference. The Official Zoning Map and all notations, references and other matters shown thereon shall be as much a part of this ordinance as if the notations, references and other matters set forth by said map were all fully described herein; the original of which is properly attested to and is on file in the Office of the City Clerk, of the City of Norwalk, Iowa. The City Council may from time to time amend the Official Zoning Map or adopt a new Official Zoning Map, which shall supersede the prior Map, in the event the Official Zoning Map becomes damaged or destroyed, or for purposes of clarity due to a number of boundary changes, or to correct drafting errors or omissions; provided, however, that any such adoption shall not have the effect of amending this zoning ordinance or any subsequent amendment thereof. The district boundaries are either lot lines or the centerlines of streets and alleys, unless otherwise shown. Where uncertainty exists as to the boundaries of districts as shown on the Official Zoning Map, the following rules shall apply:
1. Boundaries indicated as approximately following the center lines of streets, highways, alleys, or other public rights-of-way shall be construed to follow such centerlines.
2. Boundaries indicated as approximately following platted lot lines shall be construed as following such lot lines.
3. Boundaries indicated as approximately following corporate limits shall be construed as following corporate limits.
4. Boundaries indicated as approximately following section lines, quarter section lines, or quarter-quarter section lines shall be construed as following such lines.
5. Boundaries indicated, as following railroad lines shall be construed to be the centerline of the railroad right-of-way.
6. Boundaries indicated as approximately following the center lines of rivers, streams, creeks or other waterways shall be construed to follow such centerlines.
7. Boundaries not capable of being determined in the previous paragraphs shall be as dimensioned on the Official Zoning Map or if not dimensioned shall be determined by the scale shown on the map.