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Navigation chart of the Sunda Strait, showing bathymetry (sea depth), shoals and reefs, landmarks, and a rhumbline network. Notes record good anchorages, sources of water and supplies etc. Inset map of the Zutphen Islands off the coast of Sumatra.

A map of the China Sea between Malaya, Sumatra and Borneo. The numbers indicate sea depth (bathymetry), and there are drawings of the side views of some of the islands (elevations), both used to aid navigation. Some maritime routes are also marked.

This late 18th century map features a number of labels describing the local populations, including the Kemoys ('Savage People') of the mountains of Cokin China (Vietnam), the Biayos of Borneo, and the 'Wild People' of the mountains of Pegu (Myanmar).

Map of the Batavia (Jakarta) Bay roadstead, a body of water sheltered from tides/currents, for ships to anchor. The web of lines is a rhumbline network, the numbers indicate sea depth (bathymetry), and there are written notes, all to aid navigation.

Map of the Batavia (Jakarta) Bay roadstead, a body of water sheltered from tides/currents, for ships to anchor. The web of lines is a rhumbline network, the numbers indicate sea depth (bathymetry), and there are written notes, all to aid navigation.

Two maps. One features most of the world, but with Borneo, Philippines and most of mainland Southeast Asia missing, though there is an inset map of Penang. The other is a navigation map of the strait at Penang, with bathymetry and elevations.

On this map of Asia, Borneo is labelled ‘The Inland Part of this Island is inhabited by the Biayos a savage People’, a description seen on many contemporary maps. The ancient kingdoms of mainland Southeast Asia are also shown.

The cartouche on this map of Asia features an Asian man smoking a long pipe, surrounded by packages, vases, a bow and arrow, a censer (incense burner) and a camel carrying a large load. The second sheet of the map features Southeast Asia.

On this map of Asia, Borneo is labelled ‘The Inland Part of this Island is inhabited by the Biayos a savage People’, a description seen on many contemporary maps. The ancient kingdoms of mainland Southeast Asia are also shown.

This late 18th century map of Asia by the British mathematician and cartographer Samuel Dunn uses an azimuthal projection to aid navigation.

The cartouche on this map of Asia features an Asian man smoking a long pipe, surrounded by packages, vases, a bow and arrow, a censer (incense burner) and a camel carrying a large load. The second sheet of the map features Southeast Asia.

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).