Posting a little late, via Beyond the Beyond: A Museum of London Augmented Reality iPhone app that gives you access to a library of historical, geotagged images. While the screenshots have been meticulously constructed to be perfectly registered, having seen the level of precision mobile AR is up to at the moment this is going to take some work to reproduce. The results look a lot like a PhotoSynth match up of two images, which is something of a foreshadowing of the near future when these geotagged images will be more intelligently plugged into a point-cloud of the persistent architecture (the corners and cornices of those old buildings that haven’t changed for decades).

For the moment it’s a reminder of the growing body of located media, along with digitisation and making machine-legible of formerly fuzzy content of our world.