[iframe http://player.vimeo.com/video/20412632?byline=0&portrait=0&color=ffffff 500 281]

Immaterials: Light painting WiFi from Timo on Vimeo.

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/​

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

via Immaterials: Light painting WiFi on Vimeo.