The boundaries of the districts shall be as shown on the Official Zoning Map and Official Overlay Map of the Hopewell Township and West Middletown Borough which are on file in the municipal office, except for the Floodplain Overlay, which is delineated in the most current Flood Insurance Study and Flood Boundary and Floodway Map of the Hopewell Township and West Middletown Borough, as prepared by the Federal Insurance Administration or other acceptable sources. Generally, the boundary lines follow lot lines or center lines of streets. Boundaries that approximately follow the center line of streams, rivers or other bodies of water shall be construed as following such center lines. Where boundaries do not follow a previously established line, they shall be determined by use of the scale or dimensions indicated on the Official Zoning Map or Official Overlay Map or by description in this chapter. Interpretation concerning the exact location of district boundary lines shall be determined by the Zoning Officer.