Liz Gannes reports on Michael Liebhold’s argument that you can get better-than-GPS accuracy by using photographs:

He said the most promising technique is to build [a] model of the world using photographs, some of them geo-coded automatically, and the rest of them mapped using an understanding of where they are by comparing them to other images. So a photograph of vacationers in front of the Golden Gate bridge could be pinpointed in position using the precise angle of the orange arches in the background.

Liebhold goes on to say that Google’s up to something in this very space. Via geoparadigm.