The Book Depository has a nice feature called “Book Depository Live“, which allows you to see people buying books in (quasi) real time. Using Google Maps, the feature scrolls across the globe to show you the buyer’s location and the purchased book’s title.

Someone in South Africa buys a book

If I could make a suggestion to the people behind this feature, it would be that the links to books should open in new tabs. That way you could click on a book that looks intriguing without being taken away from the map view. As it is, you need to hold Shift (or Cmd if you’re on a Mac) while clicking if you want to stay on the map.

Despite this minor quibble, though, I like this feature. It reminds me of when Twitter was still new and visualisations of tweets superimposed on top of world maps were doing the rounds. Those projects were hypnotic but ultimately empty, because Twitter content suffers when isolated from conversational context. But in The Book Depository Live you might come across an interesting-looking book that you end up buying, and maybe being affected by in some way. I guess that’s something a book has over a tweet.

There’s something appealingly recursive about online maps too. Before, there were no computers and we all lived in the real world, in physical space. Then the internet came along, and we had to learn how to navigate this new virtual world, an “information space”, represented by windows and menus and buttons and so on.

After a while, the information space itself became rich enough to contain useful maps. In other words, we encountered the physical space represented within the virtual space, which we in turn encountered in the physical space. Maybe this graphic will help:

Click to see full-size graphic

OK, maybe not. But if you ever find yourself walking down a street while ignoring your surroundings and looking only at the blinking blue dot on your phone’s mapping application, you might know what I mean. And yes, I’ve done that.

Unlike the visualisation of #inauguration posts I linked to recently, this isn’t based on hash tags but instead uses moving tag clouds to illustrate the volume of Twitter posts on various subjects during the Super Bowl.

Examples include “Cardinals vs Steelers” (I know the Steelers are from Pittsburgh but from this animation I’d guess the Cardinals are from… Las Vegas? San Diego?), “talking about ads” (it’s vaguely depressing to see how much conversation the ads inspire) and player names (a guy called Fitzgerald obviously does something notable in the fourth quarter).

This is maybe the most effective use of Twitter data I’ve seen so far, as it is centred around a single event but tracks various subjects of conversation related to that event. A far simpler and less interesting animation would have simply flagged every post with the hash tag #superbowl.

Although the world map isn’t shown, over time the US and the UK become almost perfectly defined by the density of Twitter post markers. You can also see outlines of south America and western Europe.

http://projects.flowingdata.com/inauguration/

The big flurry happens when the US wakes up on Tuesday morning…

…and it worked on me. The most effective aspect of the film was its use of infographics to convey a sense of historical scale. At its core was a recurring animated graphic showing the national debt from America’s inception through to the end of the George W Bush era in 2008.

Early on in the film you see the rises in the national debt from $0 in 1835 (the only point in history when it hit zero) up until the start of World War One. After that the graphic has to keep zooming out to fit in the subsequent growth. The Great Depression sees a quite unnerving hike – but as the World War Two period looms into view, it looks like a sheer cliff face. This is a shot of the graphic running up until 1988:

In the Clinton era the debt comes down, but then Bush takes charge in 2000 and things go through the roof, rocketing past WW2′s peak. The final sequence involving this graphic displays a projection for debt growth through to 2040. Baby boomers are set to retire en masse shortly and the effect on Social Security and Medicare spending will not be good. The effect this has on the infographic – the drastic zoom needed to chart the debt up to 2040 – almost gave me a sense of vertigo. It paints a pretty dystopian vision of the future.

Even though the film is unlikely to contain any new information for someone with more than an advanced lay knowledge of the current economic situation, I’d strongly recommend watching it. As well as the extremely well designed and animated graphics, it does a remarkably effective job of communicating the seriousness of the situation even to viewers who are already aware of most of the facts.

As you scroll along to the right, for example, you’ll find yourself thinking that Iron Man looks pretty impressive. Then you’ll get to The Dark Knight…

You may be familiar with Dr John Snow as the man who successfully traced the source of London’s 1854 cholera outbreak. A pub on Broadwick Street in Soho is named after him, and the water-pump that started it all is preserved outside as a monument.

This post discusses the way the in which Dr Snow helped to ‘sell’ the results of his research, adapting an existing visualisation to create an overlaid map which communicated, in a far more immediate way than raw data or polemic might have done, the central thrust of his argument.

It’s an interesting and early example of how well-designed data visualisations can quickly convey information which could otherwise be comprehensible only to experts and adepts.