Terratrade — global flow map

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Sea lanes in use

ocean legs follow these lanes. Thickness is traffic on a stretch relative to the busiest leg within each chain, added up across the chains selected — not a volume, because the chains do not share a unit.

Route network

every catalogued section, whether this corpus ships through it or not. Thick is a core route — a trunk flow between major markets — thin a secondary one, a connector, and dashed a section the catalogue has classed as neither.