Chord diagram (information visualization)

A chord diagram is a graphical method of displaying the inter-relationships between data in a matrix.

The format can be aesthetically pleasing, making it a popular choice in the world of data visualization.

The primary use of chord diagrams is to show the flows or connections between several entities (called nodes).

To reduce the visual complexity, chord diagrams employ a technique called hierarchical edge bundling.

[1] Chord diagrams are useful for showing relationships between entities and their relative magnitudes in comparison to alternative arcs.