Just got back to Düsseldorf after an amazing weekend in Berlin for the single purpose of attending Cognitive Cities, a first round conference to discuss the future of cities in Germany and in the world in general. There’s a lot of notes and ideas that I’d like to share and record here at my blog, but I’ll start with this one which is the best example of how there’s so much to uncover around us in the cities we live..

Light painting WiFi is a film by Timo Arnall, Jørn Knutsen and Einar Sneve Martinussen. The project explores the invisible terrain imprinted by WiFi networks along urban spaces, for this they built up a a four metre tall wifi measuring rod which enables them to light painting WIFI signal strength in long-exposure photographs:

more photos Immaterials: Light painting WiFi @ Flickr and a full description of how they managed to get this amazing visualisation up and running.