Light painting WiFi

I came across this article while browsing and found it pretty awesome so I decided to share the awesomeness!

Have a look at the video below.

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:
http://www.nearfield.org/2011/02/wifi-light-painting
http://yourban.no/2011/02/22/immaterials-light-painting-wifi/

Photos:
http://www.flickr.com/photos/timo/sets/72157626020532597/Immaterials: Light painting WiFi