Unless district boundary lines are fixed by dimensions or otherwise clearly shown or described, and where uncertainty exists with respect to the boundaries of any of the aforesaid districts, as shown on the zoning map, the following rules shall apply:

14-1-1 Boundaries following center lines:

Where district boundaries are indicated as approximately following or being at right angles to the center lines of streets, highways, alleys, railroad main tracks, such center line, or lines at right angles to such center lines, shall be construed to be such boundaries as the case may be.

14-1-2 Boundaries following bodies of water:

Where a district boundary is indicated to follow a river, creek, or branch or other body of water, said boundary shall be construed to follow the center line at low water or at the limit of the jurisdiction, and in the event of change in the shoreline, such boundary shall be construed as moving with the actual shoreline.

14-1-3 Other boundary determinants:

If no distance, angle, curvature description of other means is given to determine a boundary line accurately and the foregoing provisions do not apply, the same shall be determined by the zoning administrator by using the scale shown on said zoning map. In case of subsequent disputes, the matter shall be referred to the Board of zoning appeals which shall determine the boundary.

Other uses of the same general character as those cited in a particular classification may be permitted in the mapped districts of that classification by the zoning administrator. Any use so determined shall be regarded as a listed use and a log of all said determinations shall be maintained as a part of the public records of the zoning administrator. In no instance, however, shall a use be permitted in a district when said use is first permitted in less restrictive classifications.