Map easter eggs

An excellent presentation at Reboot by Steve Coast about the amazing project OpenStreetMap revealed the fact that map makers include lots of "easter eggs" - fake info that if you make use of their maps and keep the easter eggs in then you are known to have reused their maps!

Interestingly OpenStreetMap has more volunteer, GPS wielding, mappers than the Ordnance Survey has employees.

Fascinating stuff to a map geek like me.