Category Archives: Visualization

Fireflies HD

Posted on July 12, 2011 by Michael Kreil

The following videos show the movement of 881 iPhones in Europe in April 2011. Since we couldn’t decide on a color scheme, we published all three: High Resolution Screenshot High Resolution Screenshot High Resolution Screenshot So, what do you think?

Posted in Result, Visualization | 47 Comments

Deeper insights into Apple’s “GPS”

Posted on May 16, 2011 by Michael Kreil

Some iPhone Apps need to know the location of your iPhone, e.g. the camera, Google maps, Facebook Places, Foursquare, etc. “And that’s why the iPhones has GPS!” Well, basically: Yes – but GPS has some disadvantages: battery drain: GPS uses … Continue reading →

Posted in Result, Visualization | 6 Comments

First glimpse of worldwide cell phone coverage

Posted on May 4, 2011 by Michael Kreil

Thanks to 700 iPhone logs we now have data on 2.1 million mobile phone network cells. Note 1: The colors indicate the density of surrounding network cells. They do not show the range of the cell towers. Note 2: The … Continue reading →

Posted in Result, Visualization | 11 Comments

First database dump of cell and wifi stations

Posted on May 1, 2011 by Michael Kreil

250 iPhone Logs gave us locations of: – 660.000 cell tower CellLocation.7z (8,6 MB) – rapidshare – .tsv – 6 Mio. WiFi base stations WifiLocation.7z (89 MB) –  rapidshare – .tsv License: OpenDatabase License (ODbL) We need more datasets from outside the … Continue reading →

Posted in Data, Result, Visualization | 14 Comments

distribution of wifi stations by manufacturer

Posted on April 28, 2011 by Michael Kreil
Posted in Result, Visualization | 4 Comments

wifi stations in berlin

Posted on April 28, 2011 by Michael Kreil
Posted in Result, Visualization | 18 Comments

First results

Posted on April 27, 2011 by Michael Kreil

We used the datasets of 10 iPhones (300.000 entries) to create a few heatmaps. Berlin, Frankfurt, Ruhr, Germany

Posted in Result, Visualization | 12 Comments