All our calculations in the radar, microwave, and radio business include effects of curvature. Higher and higher frequences won't conform to the curvature, very low ones will.

When a plane pilot can't talk past the curvature he has an option to select lower frequencies for a LITTLE better following of the curvature.

The many many repeater radios used by all people around the world, mounted on peaks, are so numerous,

precisely and specifically, because of curvature.

When people level something on the surface of a curve, they ELIMINATE the EFFECT of the CURVATURE.

And compacting itself is directly due to settling forces of gravity.

You're deeply mentally occluded to not know these basic things as an adult.

Look up and learn basic navigation for 10 to 15 year old children, they learn a lot about spherical objects and how distances are measured on them, when they learn about latitude and longitude and how they have to be derived.

It's simple enough that 12 year olds get navigation badges. With some study you could be that savvy about why they work, and why they will only work on a spherical world, and only of a particular specific unchanging circumference, hence diameter.