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This map of the Madura Strait between Java and Madura is designed to aid navigation: bathymetry (water depth), lighthouses, shoals and reefs, rocks and mud, anchor points, and landmark mountains are all marked. Text describes the tidal conditions.

Map of Ara Bay (east coast of Sumatra). Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked. Underwater trenches are shown, with light buoys, and there is an elevation view of the bay.

Navigation map of the west coast of Celebes (Sulawesi), north of Makassar. Bathymetry (sea depth), lighthouses, shoals and other obstructions are marked, with trees and hills as landmarks, and elevations (side views of hills) to aid navigation.

Navigation map of the waters around the islands of Bengkalis, Pedang and Tebingtinggi, off the east coast of Sumatra. Bathymetry (sea depth), tide data, reefs, shoals and other obstructions (clay, mud, shells, sand) are marked.

Large-scale plan of Singapore city, spread over eight sheets. Includes the central civic/business area around the Singapore River, Tanjong Pagar dock, and residential areas. The city is surrounded by suburbs, cemeteries, mangroves, vegetable gardens.

Map of the coastline of the bay of Batavia (Jakarta) showing the extension of the port’s pier (in red, labelled CD), the sand and mud bank and bathymetry (sea depth) in the bay, and notes regarding changes in tide levels over the years.

Designed to aid navigation around the western Java Sea, this map features bathymetry (sea depth), current and tide data, and is marked with shoals, reefs and other hazards. Written notes add details at specific locations (e.g. ‘heavy tide rips’).

Plan of the pier at the port of Batavia (Jakarta). Lines indicate the changing position of the beach and the sandbank over the years, and numbers show the water depth (red numbers=measured in the year 1823, blue=1831 and black=1864).

Plan of the pier at the port of Batavia (Jakarta). Lines indicate the changing position of the beach and the sandbank over the years, and numbers show the water depth (red numbers=measured in the year 1823, blue=1831 and black=1864).

A hand-drawn plan for improvements to the pier at the port in Batavia (Jakarta), showing profiles of stone and concrete walls/buttresses to be built along the sides of the ‘Haven Kanaal [Harbour Canal]’. Blue lines on the profiles mark water level.

Map of the Dutch town and naval base on the island of Onrust in Batavia (Jakarta) Bay, and adjacent islands, featuring the dock, boat and work sheds, ammunition stores, forge, hospital and housing. Shoals, reefs and bathymetry (sea depth) are marked.

An early 19th century map of Singapore’s southern coast and islands, with bathymetry (sea depth), shoals and reefs, anchor points, and notes to aid navigation. The roads and main buildings of Singapore city are also shown.