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The United States Treasury Department produced this map of trade routes crossing the Pacific Ocean between the United States and Asia. Each route is labelled with the names of its ports, and with the distance between them in miles.

Map of Asia featuring steamship routes—including around Southeast Asia—connecting ports such as Penang, Singapore, Batavia (Jakarta), Saigon, Bangkok, Rangun (Yangon), Manila, Macassar (Makassar) etc. There is also an inset map of Singapore.

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.

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

This late 19th century map of Southeast Asia shows the best maritime routes around the region, according to the time of year. There are also inset maps highlighting the rivers and southern islands of Singapore, and the sea depth around Labuan Island.

This detailed map of the Dutch East Indies in the mid-19th century contains a great deal of information: topographical details, settlements and administrative areas, roads, railways and maritime routes, telegraph lines, inset maps etc.

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), tide information, shipwrecks, compass roses and landmark mountains at the coasts.

Map of the Eastern Hemisphere featuring a maritime route from the Netherlands to the port of Batavia (Jakarta) in the East Indies, with each day’s progress marked. Other routes around the region and back to Europe via the Suez Canal are also shown.

Map of the Eastern Hemisphere featuring a maritime route from the Netherlands to the port of Batavia (Jakarta) in the East Indies, with each day’s progress marked. Other routes around the region and back to Europe via the Suez Canal are also shown.

This late 19th century map of Southeast Asia shows the best maritime routes around the region, according to the time of year. There are also inset maps highlighting the rivers and southern islands of Singapore, and the sea depth around Labuan Island.

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.