I've noticed that if I am zoomed in, with Google Earth, near 0 longitude (say I have the Royal observatory zoomed in on my screen), the map becomes very "jumpy". Movements using the mouse are often not smooth, but jump in quantum leaps. Rotations also squirm (try pressing the "reset north" button, especially if you have roated just slightly.).

Thus, I assume the calculations that Google Earth uses are somewhat unstable near 0 longtitude, perhaps due to (say) division near zero? In any case, it is an interesting, and somewhat disconcerting effect.

I have not noticed the same effect near 180 longitude, btw. Anyone have a better explanation for what I'm seeing (or is anyone not seeing it at all?)

Chad