https://orcid.org/0000-0003-4813-895X
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Acknowledgements
Michael Fry at National Geographic was an invaluable source of information for this essay, including the project correspondence between Bradford Washburn, National Geographic, and swisstopo. The author encourages readers to watch his thorough talk on The Heart of the Grand Canyon given at 2019 Grand Canyon Mapping Conference sponsored by Arizona State University Library (see References for link).
Disclosure statement
No potential conflict of interest was reported by the author(s).
Notes
1 Mount McKinley’s name changed to Denali in 2015.
2 In English, what was then the Swiss Federal Office of Topography is now called the Federal Office of Topography swisstopo. The short form is swisstopo with all lowercase letters.
3 Retired swisstopo cartographer, Paul Ulmer, visited Washington, D.C. to work on this map.