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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).

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).

This mid-18th century map of Asia has a stereographic projection to aid navigation. An illustration features Asian men—probably merchants, one of whom sits on a throne—and a kneeling elephant.

This mid-18th century map of Asia has a stereographic projection to aid in navigation. There is also an illustration featuring two Asian men depicted as native warriors, with a robed woman, as well as a large lizard.

This mid-18th century map of Asia has a stereographic projection to aid in navigation. There is also an illustration featuring two Asian men depicted as warriors, with a robed woman, as well as a large lizard.

This mid-18th century map of Asia has a stereographic projection to aid navigation. An illustration features Asian men—probably merchants, one of whom sits on a throne—and a kneeling elephant.

This mid-18th century map of Asia has a stereographic projection to aid navigation. An illustration features Asian men—probably merchants, one of whom sits on a throne—and a kneeling elephant.

This mid-18th century map of Asia has a stereographic projection to aid in navigation. There is also an illustration featuring two Asian men depicted as warriors, with a robed woman, as well as a large lizard.

This mid-18th century map of Asia has a stereographic projection to aid navigation. An illustration features Asian men—probably merchants, one of whom sits on a throne—and a kneeling elephant.

This mid-18th century map of Asia has a stereographic projection to aid navigation. An illustration features Asian men—probably merchants, one of whom sits on a throne—and a kneeling elephant.

This mid-18th century map of Asia has a stereographic projection to aid in navigation. There is also an illustration featuring two Asian men depicted as warriors, with a robed woman, as well as a large lizard.

Map marking the routes through maritime Southeast Asia of two delegations: a French delegation from Brest, France to Siam in 1685; and a Siamese delegation from Siam to Brest in 1686. A note next to Aceh records a sea battle against Portugal in 1616.