And, at sea level. At altitude this no longer applies either because the circumf... | Hacker News

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		wkat4242 on Aug 28, 2023 \| parent \| context \| favorite \| on: 111,111.1 meters is reliably 1 degree of latitude And, at sea level. At altitude this no longer applies either because the circumference at altitude is greater.

closewith on Aug 28, 2023 | [–]

Well, it still applies in aviation, as distance and ground speed used in navigation are measured at sea level irrespective of altitude.

pbmonster on Aug 28, 2023 | [–]

...by around 0.1%. Which is why nobody is bothering with it, considering how susceptible to wind speed distances and velocities are up there.

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