Many complex networks have their nodes distributed in space.
In this talk, I will describe various recent results for
spatially distributed networks. In particular, I will report
results obtained from a community detection method on a
large network constructed from communications between
millions of mobile phone users at a country level. I will
quantify in this network the decrease with distance of
connection probability between mobile phone users and will
describe a conjecture about a possible explanation for the
observed decrease. If time permits, I will finally describe
a surprising and unexplained connection between how people
relocate in the US and the eigenvectors of a matrix
constructed from the relocation network.