Mathematically, if one knows the distances between known locations, one can fit them to a surface and produce an accurate map.

But what will FE take as thise distances?

Can we use Google, mapquest, bing, etc?

If not, how can we determine those distances?

I need several landmarks spaced hundreds of miles apart and their distances. How to get?

For instance, Stockholm, Paris, Cairo, Moscow. What are the distances between these cities? Can I use the Google/bing/mapquest distances?