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The shaded area on this map is where volcanic ash fell from the 1883 eruption of Krakatoa (Sunda Strait between Sumatra and Java). Red figures record the thickness of the ash in millimetres; black figures are distance from the eruption in kilometres.

The Aceh War (1873–1904) between the Sultanate of Aceh and Dutch colonists is highlighted on this map of Groot-Atjeh in 1876. Flag symbols mark the locations of Dutch military posts, and some villages are described as ‘verbrande [burnt]’.

This map highlights the judicial system in the Dutch East Indies (‘Nederlands-Indië’) in the late 19th century. Different colours indicate the areas of authority of the different courts of law. There is an inset map of Java.

This overview map of the residency of Madoera (Madura Island, East Java, Indonesia) is divided into four regencies, and subdivided into 21 districts, which are numbered and listed at the bottom of the map. Major roads and settlements are also marked.

Two geological maps and four sectional drawings showing the Krakatoa volcano before and after its 1883 eruption.

This map is concerned with trade in the Dutch East Indies, highlighting useful resources such as maritime routes, railways, telegraph lines and offices, coast and harbour lights, offices of officials, areas that apply tolls and duties etc.

Nine maps of the effects of the 1883 Krakatoa volcanic eruption, including on Rakata Island itself, and Calmeyer Island (formed by the eruption). Other maps use brown shading to show the flooding of nearby islands and settlements by ensuing tsunamis.

A map of the effects of the 1883 Krakatoa volcanic eruption. The orange line is the islands’ outline pre-eruption; the red line is the boundary of the collapsed area. Red numbers are sea depth. Pre- and post-eruption sizes of the islands are listed.

The Aceh War (1873–1904) between the Sultanate of Aceh and Dutch colonists is highlighted on this map of Groot-Atjeh in 1876. Flag symbols mark the locations of Dutch troops, while a red line records the route marched by ‘agitating troops’ in 1875-6.

The Aceh War (1873–1904) between the Sultanate of Aceh and Dutch colonists is highlighted on this map of Groot-Atjeh in 1876. Flag symbols mark the locations of Dutch troops, while a red line records the route marched by ‘agitating troops’ in 1875-6.

This map of Java and Madura is colour-coded with the languages spoken in each area. Schools for local children are also marked, with symbols for each type of school, such as government, private, missionary, nursery, agricultural and seminary.

This map of Billiton (Belitung, Indonesia) features details of the island’s mining operations: blue borders divide the island into five mining districts, within which mines are represented by red crosses with an identifying number.