Whenever INSEE (French national institute of statistics) performs the french census, the application form asks us where we live and where we work. This graph corresponds to the representation of 200,000 links (or edges) between "home" and "work" (36,000 cities or nodes). More than 2,000,000 are possible (see source files).

And because people ask: why is Paris red/orange? Because of Eigenvector Centrality, a measure of node importance in a network based on a node's connections. No scientific value, just a bit of color!

If you have a computer powerful enough to model something like 2,000,0000 edges (and 36,000 nodes), feel free to fork this GitHub project: I'd love to see what it looks like (my old mac is f-word+ing slow). Feel free to contact me by email.

###Data sources & tools

• INSEE, Base sur les flux de mobilité professionnelles, 2011.
• IGN, Répertoire Géographique des Communes, 2013.
• IGN, Circé (to convert a coordinate system to another).
• Gephi, The Open Graph Viz Platform.

Creative Commons, CC BY-NC-SA 4.0

More than the license, I will be happy to know if you use this "map" or the source files in any way. Feel free to contact me by email.