That is exactly the problem. It is easy for programmers to start with a 3D sphere and start randomly projecting things on to it. However the earth itself is an

That is exactly the problem. It is easy for programmers to start with a 3D sphere and start randomly projecting things on to it. However the earth itself is an ellipsoid that bulges around the equator, so again you have a projection problem of people trying to put one shape onto a different shape.