These days we have all seen many rotating globes, but back in 1993 these were quite rare. And that was when I was asked if there was any way of adding some interest to a product called MAGI - an otherwise quite static computerised life underwriting manual.
When asked if it was possible to have a rotating globe (rather than a static map) I replied that it must be and I would look into how easy it would be.
As always, there were a few constraints:
The company already owned an existing Mercator projection, and this was used as the basis for producing the following 2D bitmap.
All I had to do was work out a way of wrapping a 2D image around a sphere.
Actually the maths is quite straightforward, and the globe at the top of this
page is the result. What you see is not the actual end product - I have
converted it to an animated gif and cut back the number of steps per revolution
just to keep the file size manageable over the internet - so it is not quite as
smooth as the original.