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Longitude is indicated in two different ways on this mid-18th century map: along the top border, it is shown in degrees (number of degrees east of London); more unusually, along the bottom border, it is shown in time (number of hours east of London).

A mid-18th century plan of Batavia (Jakarta), the main port of the Dutch East India Company's trading network in Southeast Asia. Ships can be seen transporting goods along ‘The Great River’ to the sea, overseen by Batavia Castle at the river’s mouth.