The fact that no curvature is ever found during survey destroys gravitational theory . There is no attraction to the supposed centre of Earths mass as demonstrated by all plane survey.To quell the flat earth theory once and for all, read the Cosmic Forces of Mu by James Churchward. Starting on page 51, the force of gravity is explained.
Also in the link I gave the guy is a bit of a fibber. His 12km length of measure statement does not make sense when applied to an area of 250 square km .It should read 16km+ for a square that area or nearly 18km for a circle of the same.
Nit-picking really,seems to me just an attempt at bending (or curving) the truth or making it a bit more palatable.
The actual amount of missing curvature is around 20m to 25m (66feet to 80feet).
Old pre-decimal survey books give quotes for areas of 100sq mls - a tad more than 250sq km .
Globe model is the post reset psyop imo. The biggest lie possible it seems to me.