Somewhere I read that Australian maps are being recalibrated to match gps locations more accurately due to continental drift since the 70s. They plan to do it more frequently in the future.
And of course there will be times with the supporting technology will fail for a period, be it gps, internet or the latest software update or a bizarre situation like a locust swarm, smoke, hail, dust etc or a meandering Defender driver in 2030

