It may be hard to believe, but each day we post over 1.8 billion photos to the internet, thats over 20,000 a second! While many of these are likely to be selfies, there must be many millions of photos of everyday streets and urban places. Each of these photographs holds valuable data about the qualities of each street, but because this data is in a visual format it can be hard to analyse and make sense of the huge number of images that are being posted to social media every day.

However, in a recent collaboration between Walkonomics and researchers from Yahoo Labs (Daniele Quercia, Luca Maria Aiello and Rossano Schifanella) we have been able to begin to understand what millions of urban street photos can tell us about walkability.

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When it comes to walking in the city, a smartphone is now almost as important as a good pair of shoes.  Our phones provide us with pedestrian sat-nav, reviews of the best places to visit and even measure how many calories we’re burning, while we walk.  In fact recent research suggests that our phones are encouraging us to walk further in the city and explore more places.

Now a new mobile app from Walkonomics provides an essential tool for the walkable lifestyle.  The Walkonomics app enables people to check the walkability of the street they’re standing in, as well as discover new walkable streets in other areas and add their own reviews.  The free app, which is available for Android devices, uses over 600,000 street ratings from Walkonomics.com, covering every street in San Francisco, New York and England.  But unlike other walkability apps, which only measure how many destinations are within walking distance, the Walkonomics app provides 5-star ratings for 8 different categories of pedestrian-friendliness:

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