World ports by vessel activity, the seven major chokepoints by transit volume, and the largest trade corridors routed through them.
Source: IMF PortWatch (ports + chokepoint transits, AIS-derived) | CEPII BACI (bilateral trade) | Natural Earth (basemap, 1:50m land, v5.1.2, public domain)
Methodology: Ports and chokepoint transits are IMF PortWatch estimates from satellite AIS. Chokepoint trade-share figures are from cited maritime authorities. Shipping lanes are modeled: the largest country-to-country flows (BACI) are routed via each country's busiest export port and bent through known chokepoints. Lanes are illustrative, not actual vessel tracks.