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In Canada, since 1987, geographical names have been authorised through a national committee, the Geographical Names Board of Canada (GNBC), which gives Cape Columbia’s location as above. The same source identifies Cape Aldrich (83° 7′ 0″ N, 69° 35′ 0″W). See: http://www4.rncan.gc.ca/search-place-names/unique/OADRA Accessed 18 February 2021.
From the above it is not immediately clear which of the two capes, which are within 5 km of each other, rightly holds the accolade as the most northerly point of North America (excluding Greenland).
According to Rayburn (2001) in 1992 the Canadian Permanent Committee on Geographical Names decided that the small point at latitude 83° 06’ 41.35”, would be known as Cape Columbia. Source: Alan Rayburn (January 2001). Naming Canada: stories about Canadian place names. ISBN 9780802082930 pp23-24. Retrieved 18 February 2021.