Filming the invisible – a great example!
Einar Sneve Martinussen, one of the makers, describes it like this:
The city is filled with an invisible landscape of networks that is becoming an interwoven part of daily life. WiFi networks and increasingly sophisticated mobile phones are starting to influence how urban environments are experienced and understood. We want to explore and reveal what the immaterial terrain of WiFi looks like and how it relates to the city.
Here he writes about the making of the video, and introduces another of their works, on visualizing RFID fields:
It became quite clear quite early, that both the magic and the problem of the technology was that you can’t see it…