[OSRS-PROJ] On Proj4...

[Paul Selormey]

Hello Glynn,
Thanks for the guide. I will be considering this in my work.

Best regards,
Paul.

----- Original Message ----- 
From: "Glynn Clements" <glynn.clements at virgin.net>
To: <osrs-proj at remotesensing.org>
Sent: Friday, May 31, 2002 4:18 PM
Subject: Re: [OSRS-PROJ] On Proj4...


> 
> Paul Selormey wrote:
> 
> > > To my mind, the "ultimate" solution would be to formulate the
> > > projection functions as high-level symbolic expressions, to allow:
> > > 
> > > a) automatic conversion to any programming language, and
> > > b) higher-order operations, primarily differentiation.
> > 
> > Any concrete suggestions in this regard? Anything you have in mind will
> > help.
> 
> Well, the only real requirements would be that the format should be
> easier to parse than C-with-macros, and devoid of any assumptions of
> language-specific semantics. In particular, it would be nice to avoid
> the use of mutable state, so that functional languages could be
> supported easily.
> 
> The bulk of the work would be in analysing all of the PJ_* files to
> determine the necessary feature set.
> 
> Off the top of my head, I suppose that you would need mechanims to:
> 
> a) declare projection parameters
> b) declare constants
> c) declare temporary variables
> d) define the actual equations
> e) indicate success/failure
> f) supply projection metadata
> 
> -- 
> Glynn Clements <glynn.clements at virgin.net>
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