ChampMap is a visualizing of the similarity of champions in League of Legends. For more detail about how it works, see my blog post.
The data is based on 7.8M team compositions. If it doesn't look like you'd expect, that might be because these games happened between February and July 2013.
Use the mouse wheel to zoom (you'll need this in the crowded areas), and pan by clicking and dragging. If a portrait isn't familiar, mouse over it, and the champion's name will pop up.
Made by Mike Scarpati.