Wherever the city engineer has established a system of coordinates, then the survey shall be tied into such system. The map shall show clearly what stakes, monuments or other evidence where found on the ground to determine the boundaries of the subdivision. The adjoining corners of all adjoining subdivisions, shall be identified by lot and block numbers, subdivision name, and place of record, or other proper designation. (Ord. 89 § 4.2(c), 1955).