In proving whether or not the Earth is flat can't we just do a simple distance test, assuming that any direction towards the perimeter of the Antarctic Ice Wall is south?

For example: If you have two points, both 100 miles north of the equator and 200 miles away from each other and both points travel south until they are 100 miles south of the equator and measure the distance between them. 

The thought behind this experiment is simple.  On the flat earth model each line of latitude is a larger circle and each line of longitude branches out from the north pole creating triangles.  If you draw horizontal lines through a triangle from top to bottom, you'll notice the lines get longer as you get further away from the top. 

If the earth is flat, the distance between these two travelers will increase as they follow their compass south and there distance between each other will be greater than the 200 miles it started from. If the earth is round the distance between these two points would be equivalent.  Measuring equidistant from the equator will eliminate and 'bulge' effect of the equator.



In this scenario the Earth is a globe and if we were to solve for X after the transformation of Y1 and Y2 to Y1' and Y2' x=200 miles, same as the starting distance



In the alternate scenario Earth is flat, and the distance between both points increases as we go south.  If X>200 miles it would prove the flat earth theory.


What do you guys think about that? Is this a feasible idea?