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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.

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 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.

A map charting the effects of the 1883 Krakatoa volcanic eruption: a red circle where the eruption was heard; black lines showing the hourly spread of the resulting waves; and a list of ships on which ash fell, or that encountered pumice (with date).

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.

Different levels of government monopolies are indicated on this map of the Dutch East Indies by the use of areas of colour (opium trade) and hash marks (salt trade). The inset map of Java is divided into residencies.

Map of an expedition exploring two rivers and their tributaries in southern Borneo. Villages and farms are marked (in red for Malay people; in black for Dayak people). Red numbers show height above sea-level in meters; black numbers show latitude.

Four-sheet topographic map of the residency of Rembang (Central Java) divided into regencies (pink borders) and districts (yellow borders). Crops—coconut, rice, coffee, bamboo, alang-alang, sugarcane—as well as salt pans and fishing ponds are shown.

Crops are marked on this map of Asia: Sumatra and Java have sugar, coffee, tea; the Lesser Sunda Islands and Maluku Islands have cinnamon, nutmeg and clove; mainland Southeast Asia has sugar and cotton. Arrows on the sea indicate currents.

Crops are marked on this map of Asia: Sumatra and Java have sugar, coffee, tea; the Lesser Sunda Islands and Maluku Islands have cinnamon, nutmeg and clove; mainland Southeast Asia has sugar and cotton. Arrows on the sea indicate currents.

The use of hachures—short lines/dashes that give a sense of the shape and steepness of terrain—highlight the mountain ranges along the west coast of this map of Sumatra. Many rivers flow east from the mountains to the Malacca Strait.