I’m a little late to this particular retrospective, but Wired have published a list of their favourite maps and cartographical tools of 2013. It’s a fantastic list, well worth a read.
This example here is a map of the population of San Francisco – each dot represents an individual person, coloured according to ethnicity. White: blue dots; African American: green dots; Asian: red; Latino: orange; all others: brown. The full map, of the entire US, can be seen here.
While not making Wired’s list, one of the best maps I’ve seen used for a political campaign this year was in this video from the Victorian Labor Party, to explain part of their new project transport plan, Project 10,000. Very cool stuff.