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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 late 18th century map of Asia featuring rivers, mountains, reefs and shoals. Regions are colour-coded, with the borders of the kingdoms of mainland Southeast Asia in green, and the islands of maritime Southeast Asia in yellow and red.

A late 18th century map of Asia featuring rivers, mountains, reefs and shoals. Regions are colour-coded, with the borders of the kingdoms of mainland Southeast Asia in green, and the islands of maritime Southeast Asia in yellow and red.

This map of Asia has coloured borders around mainland Southeast Asia, the Philippines, the Sunda Islands (‘Isles de la Sonde’) and the Maluku Islands (‘Isles Moluques’). The cartouche features a drawing of a sailing ship and boxes of goods.

From Antonio Zatta's atlas ‘Atlante Novissimo’, this late 18th century map of Asia features a decorative cartouche consisting of drawings of Asian plants, a ceramic pot emitting smoke, two archery quivers, and pearls in shells.

The arrows on this map show the direction of the seasonal monsoons of Southeast Asia during the late 18th century. Each arrow has a label in French, indicating the month. The hatched sea areas are where the winds always blow in the same direction.

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).

Map of the Indian Ocean dominated by a rhumbline network—a web of interconnected lines used to help plot routes—with a compass rose at the centre. At the top there are (incomplete) drawings of people with text in Dutch, French, English and Spanish.

The cartouche on this late 17th century map of Asia features an illustration of Asian traders negotiating a deal. In the background, their workers carry packages and tend to a camel.

The cartouche on this late 17th century map of Asia features an illustration of Asian traders negotiating a deal. In the background, their workers carry packages and tend to a camel.

Colourful map of the East Indies focusing on maritime navigation: there is a compass rose at the centre of a rhumbline network (a web of lines to help plot routes). Shoals, reefs and islands are also marked.

Colourful map of the East Indies focusing on maritime navigation: there is a compass rose at the centre of a rhumbline network (a web of lines to help plot routes). Shoals, reefs and islands are also marked.