[georss] Intended lat/long order

[Ron Lake]

Hi Chris:

Slippery fingers !! - one should not watch TV and type at the same time.

You are quite right it is 6422.

My apologies.

Ron

-----Original Message-----
From: Christopher Schmidt [mailto:crschmidt at crschmidt.net] 
Sent: November 8, 2007 9:58 PM
To: Ron Lake
Cc: Christopher Schmidt; georss at lists.eogeo.org
Subject: Re: [georss] Intended lat/long order

On Thu, Nov 08, 2007 at 09:41:33PM -0800, Ron Lake wrote:
> Chris:
> 
> The axis order is determined always by the CS (in this case is
> EPSG:6423).  The CS is just a part of the CRS.  The definitions are
> normalized so that a CS (like 6423) can be used in MANY CRS.  Now
geoRSS
> uses CRS 4326 which uses CS 6423

But CRS 4326 *doesn't* Use 6423, it uses 6422, which is the 2d version
of 6423. 

> - but the CRS also determines many
> other things like the datum, prime meridian etc.  Axes are just part
of
> the definition and because things are normalized it is buried a bit
> deeper. You can of course use XSLT script to assemble the pieces in
> querying the registry.

Yes, yes. I'm not concerned with that -- that's a one time learning hit
that I just had to go through, for the specific layout of this data. But
I'm still confused. Either I'm not understanding something, or we're
using a different CRS than I thought we were.

I *think* GeoRSS is 2D, and if it's 2D, then it's CS 6422, which is 2D,
and EPSG:4326 as a CRS, which is also 2D. Is this your understanding?

Regards,
-- 
Christopher Schmidt
Web Developer