I'd really like to see this kind of map for scientific publications. That is, instead of users linked by likes and such, a map of publications linked by citations. It seems this would make it easy to find the big papers in a given subject. I've looked and it seems like there are a few attempts at this out there, for example by IEEE, and Reuters (behind a paywall?), but the ones I've seen don't quite get it right. Maybe I've missed it, or maybe it's more difficult to do than it sounds?
A world map of science publications. I think it could be an awesome visualization, but more importantly, it would be really useful.
It requires Silverlight. It also isn't showing a full map (but the idea is sort of there)
http://academic.research.microsoft.com has some other tools for looking at the connections between papers and authors, and some of it does not require Silverlight.
I think just getting the data is the hardest part; there are several corpora available in academia, but not so much outside it. Although you wouldn't need the full text of the paper, just the bibliography entry, which could be much easier to get. (My PhD research was initially on scientific publication citations but the corpus we had was small, ~200 documents.)
Scientific papers are also interesting because you can use co-author relationships as a secondary graph. You could probably infer all kinds of things from that!
That's a great idea! I've heard of researchers doing this kind of analysis to detect "hidden gems," i.e., papers that influenced papers that ended up becoming the big cited paper. The tough part, of course, is that most journals are keen on keeping all of their data behind company walls. Perhaps PLoS would be an exception, though...
I've used such a tool at university but I've now found out it's a subscription service. You could get graphs of papers that were cited and could use it to find papers that were roots of a certain discipline. Though it wasn't as advanced a graph analysis as you propose it was pretty helpful.
And you're right about journals sitting on that citation data. The service I used was
A world map of science publications. I think it could be an awesome visualization, but more importantly, it would be really useful.