This project explores the invisible terrain of WiFi networks in urban spaces by light painting signal strength in long-exposure photographs.

A four-metre long measuring rod with 80 points of light reveals cross-sections through WiFi networks using a photographic technique called light-painting.

More here:
nearfield.org/2011/02/wifi-light-painting
yourban.no/2011/02/22/immaterials-light-painting-wifi/
Behind the scenes: yourban.no/2011/03/07/making-immaterials-light-painting-wifi/
Projects inspired by this film: yourban.no/2012/06/06/projects-inspired-by-immaterials-light-painting-wifi/

Photos:
flickr.com/photos/timo/sets/72157626020532597/

In case Vimeo has video problems, there is also a Youtube version here:
youtube.com/watch?v=cxdjfOkPu-E

j vimeo.com/20412632

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