June 23, 2009
How far back do your newspaper's online archives go? The U.S. Library of Congress has a database of thousands of newspapers dating back to the 1800s. In the case of over 150 of the papers, there are also digitized, searchable pages. And it's all available via its new Chronicling America API (technical details at our Chronicling America API profile).
As companies, organizations and professionals become more and more interconnected via social networks such as Twitter, LinkedIn and Facebook, a new trend is beginning to emerge—social network data visualization. This article shows you how to make a data visualization of your own.