• LiarAmongAll@lemmy.zip
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      8 hours ago

      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

    • marcos@lemmy.world
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      8 hours ago

      No, you are at the top. If you were at the center you wouldn’t need a level to tell you.

  • whotookkarl@lemmy.dbzer0.com
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    12 hours ago

    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

  • niktemadur@lemmy.world
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    11 hours ago

    OP found a manifold, and stampeded straight towards the wrong large-scale interpretation.
    Like an Earth-measuring version of charly kirk on the gun issue, and look at him now, where that got him.

    • icelimit@lemmy.ml
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      11 hours ago

      I think you’ll find that it’s a bubble on this case. Big bubble is selling the round earth theory to sell you more bubble levels to find flat locations.