Re: GPS maps are not the same
" when the road didn't change for 100 years"
Nope, the roads changed almost daily - like they still do in rural Africa.
When a bit of road gets too boggy, someone makes a bit of a detour around it and that becomes the new road. Miss that and your up to your windows in mud. After a while, detours got their own detours...
I don't live there any more but I did drive those parts for some 12 years or so - much of the skill in driving those areas was being able to spot these little detours and making a quick assessment if they were better or worse than the road.
No doubt many English roads were similar in the 1800s.