Bill Geertsen wrote:
"... what the "H..L" is a Mollweide projection, and do I really
need/want to know??"
The first part is answered at
http://www.projectpluto.com/update8.htm#projections
i.e., the place where assorted newly-added projections are
described.
As to the "need/want to know" part: probably not. This map
projection gets occasional use, mostly on maps of the earth,
and occasionally for maps of the sky where people want to see
the _entire_ sky, both hemispheres. Click on "Settings...
Projections... Mollweide", and you can judge for yourself.
Unless you want that "both-hemispheres" view, you're better
off sticking to the (default) stereographic projection.
-- Bill