GPS not nearly that reliable. There's a reason drones are moving towards computer vision rather than purely relying on GPS. The physical signs won't glitch out

GPS not nearly that reliable. There's a reason drones are moving towards computer vision rather than purely relying on GPS. The physical signs won't glitch out and show 100m offset because a tall building was reflecting GPS signals. Maybe in a 100% automated system we would replace the icons with QR codes or something but physical markers will likely be here to stay.