I'm wondering if we should have a separate thread for the 360x180 stereographics vs. the 360 polars...
I reiterate. What Jannefoo is doing here isn't the simple, 360º pano-> square, turned upside down, cartesian->polar thing. It's an equirectangular 360ºx180º pano remapped stereographically.
piizle, you can find a few good overviews for how to shoot equirectangulars on Eric Rougier's site. Only, his time estimates are, well, for him. For the rest of us mere mortals, it's a wee bit harder.
samsen, you should see this one. No helicoptors, balloons, wires, or glass platforms were used. Rougier's got the mad skillz.