The faint lines are friendship links, darkened if they have a common photo appearance. The auto-clustering algorithm also uses highlight colors for each clique (a clique has many in-group friendship links and few links to people outside the group). Looks like a big pile of pinkos to me.
Friends are also ranked using “betweeness centrality” to measure their importance in the social network; high rank goes to those who connect different cliques.
The green cloud shows common profile tags among sub-groups.
Good to see most of my friends smiling… =D
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