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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.

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.

This map of Java uses hachures: short lines/dashes that give a sense of the shape and steepness of terrain. The coast is marked with shoals and reefs (dotted lines and crosses), bathymetry (sea depth, in figures) and anchor points (anchor 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.

Published by the English cartographer John Cary (c.1754–1835), this map is marked with the routes taken from Europe to Asia by the British Royal Navy captains James Cook, John Gore, and George Vancouver, as well as the French explorer Lapérouse.

Map focusing on the passages between the islands of maritime Southeast Asia. Many 18th century routes are labelled with the ship/captain’s name and date, and there are notes on some shoals and reefs recording names, details and incidents/shipwrecks.

Chart of maritime Southeast Asia, showing bathymetry (sea depth), islands, shoals, reefs, landmarks, and notes (‘Rock seen at Low Water’), all to aid navigation. A rhumbline network has been drawn on the map in pencil. Only one sheet is present.

Map focusing on the passages between the islands of maritime Southeast Asia. Many 18th century routes are labelled with the ship/captain’s name and date, and there are notes on some shoals and reefs recording names, details and incidents/shipwrecks.