Search

Map of the Dutch colonial administrative region (residency) of Riouw (Riau) focusing on the islands and sea passages, with bathymetry (sea depth) marked. (From ‘Algemeene Atlas van Nederlandsche Indie [General Atlas of the Dutch East Indies]’.)

The borders on this mid-19th century map of mainland Southeast Asia are colour-coded to show kingdoms, countries and colonial territories. Twelve different scales are shown, as different countries used different measurement systems.