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Which African city tweets the most? Researchers at the Floating Sheep recently mapped geocoded tweets from eleven major African cities. They used tweets published in Accra, Cairo, Dar es Salaam, Cape Town, Johannesburg, Lagos, Tunis, Nairobi, Kigali, Mogadishu, and Addis Ababa throughout November 2012. The maps below display geocoded tweets in Nairobi and Cairo. Click here to see tweet maps of the other cities listed above. Note: These maps were also recently featured in The Guardian .
Overview produces intricate visualizations of large document sets — beautiful, but what do they mean? These visualizations are saying something about the documents, which you can interpret if you know a little about how they’re plotted. There are two visualizations in the current prototype version of Overview, and both are based on document clustering. The first is the items plot, which grew out of the proof-of-concept system we presented a year ago. Every document is a dot.
LUMA Partners painstakingly compiles sector landscapes (“LUMAscapes”) to organize what can be a very confusing ecosystem. We have mapped each of the increasingly overlapping key sectors of digital media: DISPLAY, SEARCH, VIDEO, MOBILE, SOCIAL, COMMERCE, and GAMING. We have also mapped the leading suppliers of capital – the DIGITAL CAPITAL LUMAscape, and the strategic aquirors – the STRATEGIC BUYER LUMAscape. We understand these LUMAscapes are not perfect.
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Google+ Ripples creates an interactive graphic of the public shares of any public post or URL on Google+ to show you how it has rippled through the network and help you discover new and interesting people to follow. Ripples shows you: People who have reshared the link will be displayed with their own circle. Inside the circle will be people who have reshared the link from that person (and so on).
Binning is a general term for grouping a dataset of N values into less than N discrete groups. These groups/bins may be spatial, temporal, or otherwise attribute-based. In this post I’m only talking about spatial (long-lat) and 2-dimensional attribute-based (scatterplot) bins.
The art of data visualization
Protovis composes custom views of data with simple marks such as bars and dots . Unlike low-level graphics libraries that quickly become tedious for visualization, Protovis defines marks through dynamic properties that encode data, allowing inheritance , scales and layouts to simplify construction. Protovis is free and open-source, provided under the BSD License .