Spherical->Ellipsoidal Earth models in OpenMap

Good afternoon.

        I've been examining the source code of the 4.4.2 release, and I have
noticed
that the Mercator projection assumes a spherical earth, instead of an
ellipsoid. I've
dug up the Snyder book "Map Projections - A Working Manual", and have
found the
corresponding ellipsoid-based formulas for performing the forward
projection
transformations.

        Before I get bogged down in the details of the Java class organization,
has
anyone given any thought as to how such a change would be implemented in
a
systematic manner (working within the current class framework)? Since
the sphere is a degenerate form of the general ellipsoid, it should be
rather straightforward to modify the arithmetic to support it.

Any thoughts on this idea would be welcome.

Regards,

Eliot

-- 
====================================================
Eliot Lebsack                         (781) 271-5830
Senior Communications Engineer    elebsack@mitre.org
The MITRE Corporation                    Bedford, MA
--
[To unsubscribe to this list send an email to "majdart@bbn.com"
with the following text in the BODY of the message "unsubscribe openmap-users"]