Andy Switky of IDEO shares these great vintage photos of a situationist prank waypoint mapping project. Andy writes:
I spoke at a conference in Wuxi about a month ago and hung out with great folks from the London College of Communication. We got to talking about GPS for some reason, and one of them remembered a couple pictures he picked up at the Ordnance Survey, the UK mapping equivalent of the USGS. The pictures are from the early 1950s and presumably show "waypoints".