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Navigation map of the southern part of the South China Sea, including the straits of Malacca and Singapore, and the Riau Archipelago. Bathymetry (sea depth), lighthouses, shoals and other obstructions are marked, with hills to use as landmarks.

Navigation map of the waters and straits around some of the islands of the Riau Archipelago, between Sumatra and Batam. Bathymetry (sea depth), current and tide data, reefs, shoals and other obstructions (clay, mud, shells, stones, sand) are marked.

Map of Sumatra and surrounding islands, with residencies—administrative districts—shown by coloured borders. There are inset maps of two residencies surrounding Padang, and of Groot-Atjeh (Aceh). Rivers, railways, roads and settlements are marked.

Map from Johannes Olivier’s book ‘Land- en Zeetogten in Nederland's Indie [Land and Sea Journeys in the Dutch Indies]’, showing European colonial possessions and indigenous kingdoms in Asia.

Map from Johannes Olivier’s book ‘Land- en Zeetogten in Nederland's Indie [Land and Sea Journeys in the Dutch Indies]’, showing European colonial possessions and indigenous kingdoms in Asia.