"Natural grade" means the ground elevations existing on a parcel of property or public right-of-way as delineated on the city's official topographic maps. Said maps have been prepared by photogrametric methods on June 29, 1960, and are on file in the city hall.
(Prior code § 19.08.502 (Ord. 582 § 1(1)(b) (part), 1965: Ord. 557 § 105 (part), 1964))