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Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1823). Planned future works and the ‘Waterkasteel’ fort are also shown.

Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1822). Planned future works and the ‘Waterkasteel’ fort are also shown.

Map of the coastline of the bay of Batavia (Jakarta) showing the sand and mud bank and bathymetry (sea depth) in the bay. A plan of part of the city, including the fort, and the surrounding countryside are also included.

Plan of the canals and rivers flowing through the city of Batavia (Jakarta), passing through the port before reaching the pier and the bay. The bay has a sand bank and figures for water depth. There are profile drawings of two of the city’s rivers.

Map of Java marked with administrative regions, settlements, roads, mountains and rivers. There is an inset map of the port city of Batavia, with its system of rivers and canals, and its surrounding country with villages, fields and plantations.

Map of Java marked with administrative regions, settlements, roads, mountains and rivers. There is an inset map of the port city of Batavia, with its system of rivers and canals, and its surrounding country with villages, fields and plantations.

A plan of Batavia in the early 19th century, with the castle, church, dock yard, timber yard and hospital highlighted on the map’s legend. Also shown is the canal flowing through the city to the port, where the sea depth (‘soundings’) is indicated.

Map focusing on the passage between Penang Island and the mainland, with shoals and reefs marked and described, and bathymetry (sea depth) shown. There are anchor points at George Town harbour, and landmarks—hills, trees, a fort—to aid navigation.

Map focusing on the passage between Penang Island and the mainland, with shoals and reefs marked and described, and bathymetry (sea depth) shown. There are anchor points at George Town harbour, and landmarks—hills, trees, a fort—to aid navigation.

There is a port at the south of this map of the Côn Đảo archipelago (Vietnam), and notes giving details such as a suitable location to careen ships (turning a ship on its side for cleaning or repair). A ruined English fort is also marked.

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.