In laying out and platting any part of the cemetery grounds, the corners of the principal subdivisions shall be indicated by boundary markers, fixed permanently in the ground as starting points for future measurements and surveys, and such boundary markers shall be plainly indicated on such plat. Such plat, when completed, shall be certified by the surveyor or engineer who made same, subscribed by the mayor, acknowledged before any officer authorized by law to take acknowledgments of deeds, and shall be filed for record in the office of the county clerk and in the office of the county register of deeds, and the filing of such plat shall operate as a legal vacation of any former plat or subdivision of such grounds and of any streets, roads or avenues passing through such grounds.