[Proj] "Double Ellipsoid" error, reproduction

[Gerald I. Evenden]

On Sunday 07 December 2008 11:30:09 am Noel Zinn wrote:
> Gerald,
	...
> (theoretically) without empirical error.  Except - and this is my objection
> in this thread heretofore - except when the ellipsoid is changed and a
> datum transformation is implicitly coupled with a map conversion.

I concur and that is where I am also having the most problem.  I have always 
viewed map conversions and datums as completely different entities.  This 
goes back to the early days of several of the programs that tightly bound the 
projections with the datum process and my pleas to more clearly separate the 
processes were pretty much ignored.

Alas.  :-(
...

-- 
The whole religious complexion of the modern world is due
to the absence from Jerusalem of a lunatic asylum.
-- Havelock Ellis (1859-1939) British psychologist