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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.

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.

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), including profile drawings of the construction parts. Lines indicate the changing position of the beach and the sandbank over the years, and numbers show the water depth.

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.

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.

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).

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.

Navigation map of the mouth of the Padang Tikar River, on the west coast of Borneo, featuring bathymetric (water depth) routes. Obstructions are marked with letters: ‘m’ (mud), ‘z’ (sand). Trees, hills and fishermen’s houses are shown as landmarks.

Navigation map of the mouth of the Padang Tikar River, on the west coast of Borneo, featuring bathymetric (water depth) routes. Obstructions are marked with letters: ‘m’ (mud), ‘z’ (sand). Trees, hills and fishermen’s houses are shown as landmarks.

Map of the Karimunjawa Islands (Java Sea) marked with the locations of shoals, reefs, anchor points and sea depth (bathymetry) to aid navigation; and with geological sites (recent rock/coral formation, basalt rock, schist rock and quartz).