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The seas of the Dutch East Indies are the focus of this map, with maritime routes, sea temperature, sea depth, currents and monsoons shown. There are graphs of population by ethnicity, agriculture and livestock, trade and shipping, and trade exports.

Three maps of the Caroline Islands. One shows colonised areas in Southeast Asia: Dutch East Indies; British North Borneo, British New Guinea; German New Guinea; Philippines (Spain); Portuguese Timor. The route of the Challenger expedition is marked.

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).

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.

Southeast Asia is shown on sheets two and three of this 12-sheet map of the Indian and Pacific oceans, including detailed inset maps of the straits of Singapore, Bangka, Gaspar and Sunda, with bathymetry (sea depth), shoals, reefs, anchorages etc.

Maritime routes had to be adjusted in response to the changing monsoon seasons, as is seen on this late 18th century map of the Indian Ocean. Drawings of the heads of children blowing—called ‘wind-heads’—are used to indicate wind direction.