[Proj] cs2cs the fast way

Noel Zinn ndzinn at comcast.net
Sat May 30 13:34:41 PDT 2009


Gerald, you've railed against proj4 for conflating geodesy (datum shifts)
with cartography (map projections), but you've done that yourself with this
Chebyshev code, x/y (one ellipsoid) => x/y (different ellipsoid).  Why?
Just because it's computationally faster?  Have you analyzed the effect of
your polynomial on the properties of the map projections involved,
conformality, for example?  Shouldn't you?  -Noel

-----Original Message-----
From: proj-bounces at lists.maptools.org
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Gerald I. Evenden
Sent: Saturday, May 30, 2009 2:57 PM
To: proj at lists.maptools.org
Subject: Re: [Proj] cs2cs the fast way

On Saturday 30 May 2009 3:11:38 pm Noel Zinn wrote:
> Gerald, I agree.  You were right to abandon geodesy in favor of
> cartography. -Noel

I'm sorry, I do not understand?  What is or was abandoned where?

> -----Original Message-----
> From: proj-bounces at lists.maptools.org
> [mailto:proj-bounces at lists.maptools.org] On Behalf Of Gerald I. Evenden
> Sent: Friday, May 29, 2009 9:54 PM
> To: PROJ.4 and general Projections Discussions
> Subject: [Proj] cs2cs the fast way
>
> I resurrected the Chebyshev code, cleaned out some error and built a
> quickie
	...

-- 
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
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