I did actually i told some surveyors to check the ocean shore line see if it's flat for miles. They already know that the answer is it is flat they've been surveying for a while. Elevations don't curve water doesn't curve. Optically where we live is measurably flat. There are settings on surveyor equipment gps to go into a curved mode if some sortbut that is just an algorithm to spit out the same answers. It's never used
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