On Wed, Apr 02, 2003 at 08:21:53 -0800,
Dennis Gearon <gearond@cvc.net> wrote:
> How easy would it be to add other datums, or the flattened spheroid model
> to be an option for calculations?
You could do it using the current earthdistance as a model for your
functions. Calculating the distance along a geodesic on those surfaces
is much more complicated. But if you have the formulas (which normally
won't be exact), you can do it.