Forgive your misunderstanding…
I am not trying to patronize anyone.
Have you studied math? Do you know how to prove a mathematical statement or an idea?
I am asking because you seem to think the examples you are giving will prove that the calculations
within the map system of MSFS are correct.
Trying to show me, the distance of other routes doesn’t regard the problem I was referring to.
If other routes are showing accurate distances, it is because of the proportion within great distances that the great circle has an effect upon. 4056NM, relative to 10800 NM is a very big difference in calculations, and if you understand how great circles are calculated you will realize why the error within Numerical Calculations of great circles increases if the accuracy of the algorithm is not taken into account. By the way, that is the reason the map system in flight is having an error in the north pole and the south.
And I gave you an example of two points with three different routes between them so that it would indicate the error, not one route as you are displaying.