Circular diagram showing relationships and flows between entities arranged around the perimeter. Arcs connect related nodes, with the width of each arc proportional to the flow value, revealing the strongest relationships at a glance.
ISS Crew Exchanges — Who Visits Whom in Space
Best for
- Showing bidirectional flows or relationships between entities
- Comparing total flow volumes across multiple categories
- Revealing the strongest connections in a network
Avoid when
- You have more than 10-12 nodes — the diagram becomes unreadable
- The flows are strictly directional (use Sankey instead)
- You need to show hierarchical relationships