See different maps of cities drawn by twitter links
like this Map of San Francisco
A nice and simple method to take into account both weights and dispersion of ties: by Tore Opsal
https://www.nytimes.com/2011/06/05/technology/05ping.html?_r=2
Grubwithus Organizes Dinners – Social, Minus Media – NYTimes.com, june 4th 2011
if you want your own movement (available on your MAC), download the application