# Dave Troy: Social maps that reveal a city's intersections — and separations

Every city has its neighborhoods, cliques and clubs, the hidden lines that join and divide people in the same town. What can we learn about cities by looking at what people share online? Starting with his own home town of Baltimore, Dave Troy has been visualizing what the tweets of city dwellers reveal about who lives there, who they talk to — and who they don’t.

- Kind: Talk
- Year: 2014
- Runtime: 5 min
- By: TED.com
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/DaveTroy_2014U)
- Licence or status: [CC BY-NC-ND 3.0](http://creativecommons.org/licenses/by-nc-nd/3.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/DaveTroy_2014U?play=1)