Place tiles on a globe

[oli-obk]

I don't think it is noticeable until you fly very far and the ground starts tilting, though we could experiment with other radii.

fix #33

[DerKarlos]

It will be useful, if we offer to select the place in 3D on a rotatable Earth.
We could now use the OSM API for zoom 0 to 13 may be.

If we had infinite view it would limit the tiles.
If we will have terrain it will limit the view too.

As we have to mind the camera near and far limits,
we may do some "tricks".

• Shrink the size of Earth in low zoom level
• A realistic infinite view will be impossible. But we could dynamically generate a sky dome for the distant parts (That's my latest invention, I am very broud of)

[oli-obk]

As we have to mind the camera near and far limits,

we can check how https://crates.io/crates/big_space does it and whether it will allow us to have infinite camera range. at least their demo seems to allow viewing an earth sized object from the moon, all at their real coordinates without any tricks