A traverse of the exterior boundaries of the parcel map and of each parcel therein, when computed from field measurements on the ground, must close within a limit of error of one foot (1') in three thousand feet (3,000') on perimeter. The civil engineer or land surveyor must furnish the city engineer at the time the parcel map is submitted to him for his certificate, the traverse sheets showing mathematical closure, within the allowable limits of closure. On curves, closure shall be by chord measurement. Other detail maps shall be furnished as may be required for accurate checking. (Ord. 1152, 4-25-1978)