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Shipping routes are the focus of this map of the Dutch East Indies, indicated by red lines labelled with the name of the shipping company and the destinations. Parcel shipping routes are also shown. Inset maps feature railway lines too.

Two maps, one of which features mainland Southeast Asia: Anam (Tonquin and Cochin China) in red, Lower Cochin China in green, Cambodia in yellow, and Siam in white. An inset map shows maritime routes between Europe and Asia.

A brightly-coloured hand-drawn map of the Gulf of Siam, made for a ship’s captain. The elaborate compass roses are the centre of a rhumbline network, a web of lines to aid navigation. Bathymetry (sea depth), islands, shoals and reefs are also marked.