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st: RE: RE: spatwmat: a further thought on XY coordinates


From   "FEIVESON, ALAN H. (AL) (JSC-SK) (NASA)" <alan.h.feiveson@nasa.gov>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: spatwmat: a further thought on XY coordinates
Date   Fri, 4 Feb 2005 12:24:57 -0600

Nick - So how do you refer to a point 

a) on the earth's surface (whatever "surface" means, since there is
topography)?
b) in the earth's interior

without numbers?

Al F.

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Nick Cox
Sent: Friday, February 04, 2005 12:14 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: spatwmat: a further thought on XY coordinates


This is not a problem. Most geographers 
do not worry about coordinates of any 
kind, being somewhat averse to numbers 
in any shape or form. Those that do are 
aware that the Earth is a oblate spheroid, 
and better treated in a non-Cartesian way. 

Nick 
n.j.cox@durham.ac.uk 

Julia Gamas

> XY coordinates may just be referring to the zone pair:  So in 
> my case if zones 1
> and 2 are neighbors then the XY="12" and "21" entries in the 
> table are 1.  If
> so it seems a bit "dangerous" to name it this because a 
> geographer will
> interpret them as literally the XY coordinates on the globe, 
> making the whole
> thing confusing.  

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