It's level, not flat. Measuring flat-ness is a whole different complexity and ball game.
this post was submitted on 21 Oct 2025
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You mean a whole different disc game.
Yep, we use laser trackers at work to define flatness. I'm sure that much isn't required, but it's down to .003in, so pretty flat and it's fast. But that's a literal laser instrument designed to do such things and costs 250k. I guess you could with a faro arm or romer arm, but again, those are still 10s of thousands of dollars. CMM? Those can get reeeaaallly pricy
Some ancient Greek nerd calculating the earth's circumference by measuring shadows: Am I a joke to you?
I'm going to stop saying it's level
Now: it's correctly tangential to the Earth
It's flat all across the globe
.nl
checks out
Nonspherical Land
Lemmy.flat
The haversine formula is more accurate than a straight line in measuring distances around the size of cities or zip codes. Geodesics are even more accurate because they take into account the stretching around the equator, both require curved earths to calculate more accurate distances than flat calculations. But obviously math, especially addition, is a conspiracy to cover the truth of the Time Cube™. /s
wAtEr fInDs ItS lEvEl
Can it find my level? I lost it 🥺