Erich Fisher came up with a new great visualization of web data. The maps highlight where people post geo-tagged photos to Flickr (red) from and geo-tagged tweets to Twitter from (blue), or both (white). (via Information Aesthetics)
What I like particularly about this kind of map is the way it unveils urban hierarchy.
[all images credit: Erich Fisher] (via Information Aesthetics)
(via Information Aesthetics)
Could it tell us somthing about urban centrality?
NY
São Paulo
check out these other two “old” projects of him: tourists versus locals and the geographical distribution of racial and ethnic divides in cities around the world (originally inspired by Bill Rankin).