Alan Mislove

It's a pretty impressive snapshot of the transportation networks of large stretches of the globe.

You may have seen earlier this summer a series of maps released by Twitter showing the geography of different cities as revealed by millions of tweets. Such maps of digital information are compelling for the way they also illustrate concrete infrastructure: the road networks around cities, the public parks inside of them, the clusters of commercial office buildings.

If you missed your own city in that series, Northeastern University assistant professor of computer science Alan Mislove has created a global, navigable map using much of the same data.

Maps of geo-tagged tweets always represent a biased sample of a biased sample. Tons of people aren't on Twitter. And of those who are, the vast majority never opt in to sharing their geographic location. The 275 million tweets shown in Mislove's map, collected between 2011 and April of the year, reflect just the 1.5 percent of messages that are readily geo-tagged. Still, these people appear to give a pretty impressive snapshot of the transportation networks of large stretches of the globe.

"The fact that you can see roads for example," Mislove says, "took me completely by surprise." Here, for example, are interstates 20, 85 and 75 converging on Atlanta:

We've embedded Mislove's full map below. But here are some of our favorite less obvious pieces of transportation infrastructure that clearly emerge from millions of tweets. On this map of the English Channel, you can see ferry boats crossing between Dover and Calais, on the French side:

A similar stretch of ferries run between Holyhead in the U.K. and Dublin:

And here ferries fan out from Istanbul in the Sea of Marmara:

In the San Francisco Bay Area, the Golden Gate Bridge, Bay Bridge, San Mateo Bridge and Dumbarton Bridge are all apparent:

If you find your own examples here – people waiting at airports? riding Amtrak? – please share them in the comments section.

All images courtesy of Alan Mislove.

About the Author

Most Popular

  1. a map of future climate risks in the U.S.
    Maps

    America After Climate Change, Mapped

    With “The 2100 Project: An Atlas for A Green New Deal,” the McHarg Center tries to visualize how the warming world will reshape the United States.

  2. Perspective

    Why Car-Free Streets Will Soon Be the Norm

    In cities like New York, Paris, Rotterdam, and soon San Francisco, car-free streets are emerging amid a growing movement.

  3. photo: a commuter looks at a small map of the London Tube in 2009
    Maps

    Help! The London Tube Map Is Out of Control.

    It’s never been easy to design a map of the city’s underground transit network. But soon, critics say, legibility concerns will demand a new look.

  4. How To

    Want Solar Panels on Your Roof? Here's What You Need to Know

    A handy reference for navigating an emerging industry.

  5. Design

    New York City Will Require Bird-Friendly Glass on Buildings

    Hundreds of thousands of migratory birds smash into the city’s buildings every year. The city council just passed a bill to cut back on the carnage.

×