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Navigation map of the Riau Roadstead (off west coast of Bintan, Riau Archipelago): a body of water sheltered from tides/currents, for ships to anchor. Bathymetry (sea depth) and various obstructions and landmarks (hills, buildings, trees) are shown.

This map of Sumatra is divided into administrative areas called ‘residencies’, which include the surrounding islands such as the Riau Archipelago and islands in the South China Sea.