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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.

Two maps. One features most of the world, but with Borneo, Philippines and most of mainland Southeast Asia missing, though there is an inset map of Penang. The other is a navigation map of the strait at Penang, with bathymetry and elevations.

Hand-drawn map of islands in the Riau Archipelago, with bathymetry (sea depth) marked. It features side views of hills (‘elevations’) to use as landmarks, including ‘Jehore hill’, probably in Johor at the southern tip of the Malay Peninsula.

This mid-18th century maritime map charts the seas between Peninsula Malaysia and Sumatra, including Singapore—named ‘Po. Panjang’—with the old and new Straits of Singapore marked. The numbers indicate sea depth (bathymetry).