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A map of the effects of the 1883 Krakatoa volcanic eruption. The red line is the boundary of the collapsed area. Black numbers are sea depth before the eruption; red numbers are after. A line above a number means no ground found at that depth.

A map showing the results of the 1883 eruption of the Krakatoa volcano. Black numbers indicate sea depth before the eruption; red numbers are after.

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]’.

A series of graphs and drawings about the 1883 eruption of the Krakatoa volcano. Includes elevation views from 1849 and 1880, a globe showing where the eruption was heard, a sketch of the crater of one of the cones, and a cross-section of a volcano.

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

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).

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 Straits Settlements are in red, with the rest of the map marked with names of local peoples (‘Inhabited by the Johor Jakuns’) and resources (mines). Many areas are left blank or vague as unexplored or approximate. Inset map of Singapore city.

The Straits Settlements are in red, with the rest of the map marked with names of local peoples (‘Inhabited by the Johor Jakuns’) and resources (mines). Many areas are left blank or vague as unexplored or approximate. Inset map of Singapore city.