When uncertainty exists with respect to the boundaries of the various districts as shown on the official zoning map, the following rules shall apply:
A. All land within the corporate limits is zoned and is subject to this title.
B. District boundary lines are either the centerlines of railroads, highways, streets, alleys, or easements, or the boundary line of sections, quarter sections, divisions of sections, tracts or lots or such lines extended or as otherwise indicated.
C. In areas not subdivided into lots and blocks, wherever a district is indicated as a strip adjacent to and paralleling a street or highway, the depth of such strips shall be measured at right angles from the centerline of the street or highway and the length of the frontage shall be in accordance with the dimensions shown on the map from the section, quarter section or division lines, or centerlines of street, highway or railroad rights of way unless otherwise indicated.
D. Where a lot held in single ownership of record on the effective date of this title is divided by a district boundary line, the entire lot shall be construed to be within either district at owner's discretion, provided that this shall not apply if it increases the less restricted frontage of the lot by more than twenty five feet (25'). (Ord. 2009-34, 12-3-2009, eff. 1-1-2010)