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friendly / HistDataVis

Website for my book, _A History of Data Visualization & Graphic Communication_, Harvard University Press, 2021
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Longitude calculation (page 35) #1

Open Christopher-Shera opened 3 years ago

Christopher-Shera commented 3 years ago

Maybe I am simply misunderstanding how the calculation is done, but shouldn't the sentence about the mariner at the top of page 35 read "His longitude is 1.5 x 15 = 22.5 degrees east of Toledo" (rather than 37.5 degrees west)? This puts the mariner somewhere off the Italian coast in the Mediterranean, rather than in the Atlantic. There are 1.5 hours between 10:30 and midnight, and if the mariner's time is later (midnight, vs 10:30 in Toledo), then isn't he to the east?

friendly commented 3 years ago

Thanks; but p. 35 of what? I don't see this text in the .Rd documentation

Christopher-Shera commented 3 years ago

Apologies! Page 35 of A History of Data Visualization and Graphic Communication. This is the GitHub site linked on the book's website.

friendly commented 2 years ago

Thx so much for this catch. I've added this to the list of Errata, shown in pdf/Errata.pdf.