The Gulf Stream is charted to explain slow mail

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Asked in 1768 why British mail packets sailing from Falmouth were consistently slower to America than ordinary merchantmen, Benjamin Franklin — then deputy postmaster general for the colonies — put the question to his cousin Timothy Folger, a Nantucket whaling captain, who attributed it to the Gulf Stream. Franklin had Folger sketch the current on a chart of the Atlantic with sailing remarks and sent it to the Post Office in October 1768; the engraved chart was available by early 1769, printed in very small numbers for packet captains. Later versions were printed in Paris around 1780–1783 and in Philadelphia in 1786.

A node is not a place. Drawing it on a map would assert something about the world that no stored fact supports.