Dionisio Alcalá Galiano (October 8, 1760 – October 21, 1805) was a Spanish naval officer, cartographer, and explorer. He mapped various coastlines in Europe and the Americas with unprecedented accuracy, using new technology such as chronometers. He commanded an expedition that explored and mapped the Strait of Juan de Fuca and the Strait of Georgia, and made the first European circumnavigation of Vancouver Island. He reached the rank of brigadier and died during the Battle of Trafalgar.
