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A geological map of western Borneo made by a mine engineer, showing the types of soil, coal, clay, and rock (limestone, sandstone, granite, basalt), as well as gold, diamonds, tin, copper and iron found along the rivers.

Map of the bay at Bengkoelen (Bengkulu, west coast of Sumatra), with bathymetry (sea depth), islands, shoals and reefs marked. Two lighthouses are shown, with lines to indicate the limits of their range.

Map of the bay at Bengkoelen (Bengkulu, west coast of Sumatra), with bathymetry (sea depth), islands, shoals and reefs marked. Two lighthouses are shown, with lines to indicate the limits of their range.

Map of Java and Madura divided into administrative districts, and featuring mountains, settlements and major roads. There is an inset map of the port city of Batavia (Jakarta) and its surrounding fields and countryside.

Map of Java and Madura divided into administrative districts, and featuring mountains, settlements and major roads. There is an inset map of the port city of Batavia (Jakarta) and its surrounding fields and countryside.

This detailed map of the Dutch East Indies in the mid-19th century is spread over eight sheets, plus a cover sheet showing the whole area. There are numerous inset maps of islands, bays, cities etc.

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.

This map of the Dutch East Indies is spread over eight sheets, with a hand-drawn cover sheet showing the whole area. There are numerous inset maps of islands, bays, cities etc. Two of the inset maps have a replacement map pasted over them.

A navigation map of the Java Sea and Sunda Islands, with bathymetry (sea depth), maritime routes, shoals and reefs, and elevations (side views of terrestrial landmarks). Inset maps feature the bay at Batavia and the straits between the Sunda Islands.

Hand-drawn map of routes through the Iris-straat (Iris Strait) and Triton’s-baai (Triton Bay) in New Guinea. Bathymetry (sea depth) and reefs are shown, and there is an elevation (side view) of the islands and hills seen at the bay’s entrance.

This early 19th century map shows the islands, shoals and reefs in the harbour of the important port city of Batavia (Jakarta) in the Dutch East Indies. Individual islands and reefs are named, as are the rivers and canals on land.

Chart of the north coast of Java, featuring a rhumbline network—a web of lines to help plot routes—bathymetry (sea depth), shoals, reefs and side views of landmark mountains (elevations), all to aid navigation. With an inset map of nearby islands.