[Proj] Geocentric vs. Geodetic latitude

[Fei Li]

In some satellite application people need geocentric and geodetic coordinate
system both. I am one of them.



----- Original Message ----- 
From: "Gerald Evenden" <gerald.evenden at verizon.net>
To: <proj at remotesensing.org>
Sent: Wednesday, April 28, 2004 8:28 AM
Subject: Re: [Proj] Geocentric vs. Geodetic latitude


> Search for the string 'geoc' in pj_fwd.c and pj_inv.c.  P->geoc is the
> flag causing geocentric conversion.  Conversion follows the 'if'
> statement.
>
> I agree that geocentric is most likely a satellite data parameter and
> since I have not normally be involved with such data I have not
> had much contact with geocentric latitude.
>
> +geoc has been in proj.4 since Hector was a pup and I cannot remember
> what prompted me to include it.  Must have sounded like a good idea
> at the time.
>
> On Apr 28, 2004, at 11:18 AM, Frank Warmerdam wrote:
>
> >
> > Folks,
> > ...
>
> > 117dW   33d9'33.537"N
> >
> > So, I think I am in the clear.  I didn't find the actual geocentric
> > code
> > in PROJ.4, and had never used this +geoc option before.
> >
> ...
> _____________________________________
> Jerry and the low riders: Daisy Mae and Joshua
>
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