Zoning district boundary lines are intended to follow street center lines, railroad rights-of-way, and lot or property lines as they exist on lots of record at the time of enactment of this chapter unless otherwise indicated by dimensions on the Zoning Map. Any dimensions shown shall be in feet and measured horizontally and, when measured from a street, shall be measured from the street right-of-way line even if the centerline of that street is used for the location of a zoning district line. The exact location of any disputed zoning district boundary line shall be determined by the Board of Adjustment. The zoning standards, controls and designations apply to every structure, lot and use within each district, and the district lines extend vertically in both directions from ground level.