1. Boundaries indicated as approximately following the center lines of easements, streets, highways or alleys shall be construed to follow such center lines;

2. Boundaries indicated as approximately following platted lot lines shall be construed as following such lot lines;

3. Boundaries indicated as approximately following city limits shall be construed as following such city limits;

4. Boundaries indicated as following railroad lines shall be construed to be midway between the main tracks;

5. Boundaries indicated as following shore lines shall be construed to follow such shore lines, and in the event of change in the shore line shall be construed as moving with the actual shore line; boundaries indicated as approximately following the center lines of streams, rivers, canals, lakes, or other bodies of water shall be construed to follow such center lines;

6. Boundaries indicated as parallel to or extensions of features indicated in subsections (A)(1) through (A)(5) of this section shall be so construed. Distances not specifically indicated on the official zoning map shall be determined by the scale of the map;

7. Where physical and cultural features existing on the ground are at variance with those shown on the official zoning map, or in other circumstances not covered by subsections (A)(1) through (A)(6) of this section, the city commission shall interpret the district boundaries.

8. Where a district boundary line divides a lot which was in single ownership at the time of passage of this chapter, the planner may permit the extension of the regulations for either portion of the lot not to exceed 500 feet beyond the district line into the remaining portion of the lot. (Prior code § 16.43.326)