"Equation for calculating curvature" You have no credibility right out of the gate. You have a flawed understanding of what a planet is. You gave me an equation for 'modelling' the earth, saying that that equation calculates curvature. Theres no fixed formula that the planet was shaped using - we are a mass of rock that has been formed over millions of years. You take a composite average of that, and yeah you get a "formula" for modelling the earth, but it's not an absolute way to determine what the earth is like at any given point. Most planets are actually ovular than spherical due to their own gravity and rotation over time (yOu pRobAbLy dOnT knOw WhAt I'm TaLkInG aBouT tHouGh)

If you think its a binary choice of a perfect spherical Earth or a flat earth, you are the closed minded one.

I've been on a team that has built, and sent to orbit, a small sat. We put trackers on it and watched it go round the earth in real time. It's still there - if you put in the coordinates to a telescope you can even see it. There is hundreds if not thousands of ways for you to witness, yourself, how retarded a flat earth theory is. Thinking the earth is flat is a ridiculously flawed and illogical way to view our world.

Im curious, in your flat earth model, what are tides? Sunrise? Sunset? Meteors? Stars? What is weather? Seasons? Have you flown in an airplane? Have you seen a horizon? Have you calculated orbital trajectories? Have you <insert literally almost any daily activity here that discredits flat earth>

Are we on a turtles back? Where are we? Enlighten me, oh wise one with your mind so much more open than mine.