The whole of New Zealand was out by 190 metres - we're in the middle of fixing it. No big deal: redraw, rebrand, reprint, redistribute every single topographical map of the country; recalibrate/reprogram some of the GPS devices; run batch programs to change the coordinate position of everything in every database in the country; work really hard to make sure all the emergency services stay on the same page ...er... map. Simple really. Harder is telling people it is happening: nobody I speak to even knows. It would have been a little simpler if they had got it right the first time, but that is unfair criticism since technology has moved on over the however-many decades or centuries since they surveyed it for the last set of maps. The errors took a long time to show up (when GPS became widely used).
Imagine the reaction if it were to come out in a year or so that the latest set of maps is still wrong.