No We generally only record evidence of title in the United States No change needs to be made to existing deeds and acres are always the least important information in the description on those deeds in any case often more or less in legalese In fact especially in most of the western United States the normal descriptions in deeds are government sections quarter sections quarter quarter sections and the like and all across the country in towns block and lot description They aren t usually done in metes and bounds Generally there are at least 11 sections in every survey township which contain more or less than 640 acres The boundaries wouldn t be redrawn the country wouldn t be resurveyed in one kilometer blocks Parts of the U S have already made similar changes from arpents or varas