I've used Google Maps API to visualize a relatively large network collected from Steam Community members. The data is collected from public player profiles that Valve reveals through their Steam Web API. For each player their links to friends and links to Steam Groups they belong are collected. This creates a social network which can be visualized using Gephi.
Website: http://85.25.226.110/mapper
Static screenshots from earlier stages of the network:
- http://i.imgur.com/I4KXO.jpg
- http://imgur.com/GqKsF - 2560x1440
- http://imgur.com/GbaSE - edges visible, 2560x1440
It takes several hours to render all 9 layers of the map. Good thing is that the network doesn't have to be re-rendered particularly often. The static images represent approximately the same data but have just a different layout.
Graph consists of 212600 nodes and 4045203 edges. Before filtering outliers and low/high degree nodes there are approximately 800 000 groups and over 11 million users.
The layout uses Force Atlas 2 and takes about 10-30 minutes to start to look visually pleasing but I usually let the algorithm run over night to get the finer details smooth as well.
![Image](http://i.imgur.com/I4KXOl.png)