"Hop David" wrote:
I believe the cartographers for tide locked earth like moons would make
interesting globes.

On earth 0 degrees longitude is arbitrary. But on a tide locked earth
like moon, the point on the equator closest to the primary could be a
non arbitrary choice. The point furthest from the primary would be 180
degrees. There would be three great circles: the equator, a great circle
containing the poles and points nearest and farthests from the primary,
and the third great circle cuts the moon in half along a plane
perpendicular to the primary's radius vector. (I think of this 3rd great
circle as a "terminator" also that usually means a plane perpendicular
to the sun vector)

The globe would look like an inflated octahedron.

That's not the half of it. Think about the troubles of
navigation. For millenia it was difficult to determine
both longitude and latitude on the open ocean. Latitude
was the easiest to determine with crude methods (height
of the Sun above the horizon at noon, etc.) and
travelling along one partituclar line of latitude was
the easiest form of oceanic navigation for a long time.
But having a gigantic planet in the sky adds a new twist.
Just look up and you can see what time it is at 0
longitude, plus, you can just look at the position in
the sky of the planet and know what your position on the
moon is fairly easily. That would make early map making
and long distance travel a lot easier.