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Southeast Asia is on sheet four of this map. British colonial territory—British Burma, the Straits Settlements, Sarawak, Brunei, British North Borneo—is highlighted in red, with Dutch, Spanish, French and Portuguese territory also shown.

Map of stream ship trade routes around Southeast Asia. Rivers, railways, submarine telegraph cables, lighthouses (fixed, revolving and flashing), graving docks and coaling stations are marked. An inset map shows a railway route from Britain to Asia.

Southeast Asia is on sheet four of this map. British colonial territory—British Burma, the Straits Settlements, Sarawak, British North Borneo—is highlighted in red, with the Dutch East Indies, Spanish Philippines and Portuguese East Timor also shown.

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

Map of Asia on four sheets, with Southeast Asia on sheet four. British colonial territory—British Burma, the Straits Settlements, Sarawak—is highlighted in red, with the Dutch East Indies, Spanish Philippines and Portuguese East Timor also shown.

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.

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.

Nautical charts like this are detailed around the coasts and on the seas (e.g. river mouths, islands, shoals and reefs) while the interiors are blank. The web of lines is a rhumbline network, while the numbers indicate sea depth (bathymetry).