Robert Sanderson wrote:

> Term and Data can be:  point, line, area, volume
> (0 through 3 dimensions)

I think we're in danger of both oversimplifying and overcomplicating and that
(1) we should get requirements from geo folks, and (2) linear range searching
is probably not simply a special case and should be treated separately.
Oversimplifying because point, line, area, and volume don't cover: (a) curve
and (b) surface.
Overcomplicating because it appears that the geo folks may only want a crude
normalized rectangle (east bounding longitute, west bounding longitude, north
bounding latitude, and south bounding latitude).  See:
 http://testbed.alexandria.ucsb.edu/index_mw.html
(reference provided by Caroline Arms here at LC).

--Ray