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A nautical chart of the Indian Ocean showing bathymetry (sea depth), including in great detail around the seas and straits of Southeast Asia.

A series of four maps of the Indian Ocean—one for each quarter of the calendar year—showing the direction and intensity of the winds, including around the seas of Southeast Asia. There are extensive explanatory notes.

Map of the Indian Ocean showing the currents (represented by arrows), including during the North East and North West monsoons. Numbers on the arrows indicate the current’s speed.

Map of the Indian Ocean showing maritime routes, including some to and around Southeast Asia, where they pass through the Strait of Malacca, the Sunda Strait, and the straits between the Lesser Sunda Islands.

Chart of the Indian Ocean, showing climate and weather-related data, including around the seas and straits of Southeast Asia where trade routes are marked, along with monsoon and typhoon regions, and currents during the different monsoon seasons.

A world map, including Southeast Asia, showing isothermal lines—lines that join locations of the same temperature—of annual mean temperature. There are also isobars (lines that join locations of the same barometric pressure).

A world map showing winds, hurricanes and typhoons, including trade winds, calms, typhoon, monsoon and hurricane regions in Southeast Asia. An inset map shows the approach of the Rodriguez Hurricane towards Java in 1843.

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.

Coloured borders identify the colonial possessions of Britain, the Netherlands, Spain, Denmark and Portugal in mid-19th century Southeast Asia. Cities are marked with symbols indicating population, and military forts are marked with star symbols.

Coloured borders identify the colonial possessions of Britain, the Netherlands, Spain, Denmark and Portugal in mid-19th century Southeast Asia. Cities are marked with symbols indicating population, and military forts are marked with star symbols.

To aid navigation, this map shows small islands, shoals and reefs, maritime routes for use during monsoons or at particular times of the year, bathymetry (sea depth), past explorers’ routes, shipwrecks and text about monsoons, typhoons and currents.

Map focusing on the passages between the islands of maritime Southeast Asia used to travel between the Indian and Pacific oceans. Includes the Strait of Malacca, many straits between the Sunda Islands, and a route through the Maluku Islands.