Visualizing WiFi Signals with Light

Have you ever wondered what the WiFi signal looks like around your office, school, or local café? In this video, Timo ArnallJørn Knutsen, and Einar Sneve Martinussen show you the invisible. And they pulled this off by building a WiFi measuring rod, measuring four meters in length, that can visualize WiFi signals around Oslo, Norway with the help of long exposure photography.

What’s fascinating to see is how the WiFi signals vary across the city. Away from residential buildings, the drop-off in WiFi strength is steep. On the other hand, the WiFi signal is dense around commercial and academic buildings. The amazing visualization gives us a glimpse into the complex relationships between WiFi networks and the physical environments underpinning them. For a deeper read about this project, see this blog post.

Eugene Buchko is a blogger and photographer living in Atlanta, GA. He maintains a photoblog, Erudite Expressions, and writes about what he reads on his reading blog.


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  1. Einar Sneve Martinussen says . . . | March 3, 2011 / 3:42 am

    Very nice of you to write about our work. Could you please use the official Vimeo film instead of this, which is pirated on youtube. Here is the official link to our film:

  2. Dan Colman says . . . | March 3, 2011 / 8:21 am

    Hi Einar,

    That vimeo video has now been swapped in. Thanks for the heads up, and congrats on that fine work.


  3. Dan Colman says . . . | March 3, 2011 / 9:42 am


    The Vimeo video has been acting funny… Sometimes it plays; sometimes it doesn’t. We’ll try it again later.


  4. Shelley says . . . | March 3, 2011 / 10:37 am

    It’s possible to fall in love with that visual as a wall of light. But it dims a little if you let yourself think of the actual content being carried….

  5. dasio says . . . | March 4, 2011 / 7:35 pm

    there so much around us that we are missing, if only we had a more open mind

  6. autocad kursu says . . . | December 30, 2012 / 1:41 pm

    I’ve found that the best data subject, thank you

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