From: James Stein on
MathWorld has an entry for "Stereographic Projections" at
<http://mathworld.wolfram.com/StereographicProjection.html>.
I downloaded the notebook there, but it fails on the very first input:

<< MathWorld`MapProjections`

I've searched around on the web, but only find a short thread
indicating that others have also had trouble loading
"Eric Weisstein's MathWorld packages ".

Hints / Help / Info, any one?