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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).

Hand-drawn portolan (nautical) chart, featuring a rhumbline network (the web of interconnected lines), bathymetry (sea depth), shoals and reefs, and names of coastal settlements, all to aid navigation. With a colourful compass rose.