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From:David (SST - Adelaide) Logan Date:April 26 2006 1:54am
Subject:RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)
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You could further explain the lats and longs being "slightly off" by the
use of a different datum. There are many many datums utilised by
different geographical/geological authorities. This difference could
become quite large dependent upon the datum used. 
 
As gmail user as noted, negative = West and South, positive = North and
East.
 
Regards
---------------------------------------------------------------
********** _/     **********  David Logan 
*******   _/         *******  ITO Delivery Specialist - Database
*****    _/            *****  Hewlett-Packard Australia Ltd
****    _/_/_/  _/_/_/  ****  E-Mail: david.logan@stripped
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*****        _/       ******    
******      _/      ********  Postal: 148 Frome Street,
********   _/     **********          Adelaide SA 5001
                                      Australia 
i    n    v    e    n    t                                   
---------------------------------------------------------------
 

________________________________

From: Peter Brawley [mailto:peter.brawley@stripped] 
Sent: Wednesday, 26 April 2006 11:17 AM
To: Daevid Vincent
Cc: mysql@stripped
Subject: Re: Calculate LONG/LAT from ZIP+4 (positve vs. negative
longitude)


Daevid Vincent wrote: 

	My confusion is that I have some formulas to plug in these
values, but it
	seems to me that if I use the wrong set of data, my zipcodes
will be wrong
	too. I also don't understand why there is even such a
difference. I can
	understand a few decimal points being different, but I don't
understand how
	they are positive and negative, when it's supposed to be based
upon the
	equator and the prime meridian. 

Hasn't that already been explained here? Sign is entirely a matter of
convenience and convention.

PB




	  

		-----Original Message-----
		From: Gmail User [mailto:nowuknow@stripped] 
		Sent: Tuesday, April 25, 2006 6:03 AM
		To: mysql@stripped
		Subject: RE: Calculate LONG/LAT from ZIP+4 (positve vs. 
		negative longitude)
		
		On Tue, 2006-04-25 at 00:43 -0700, Daevid Vincent wrote:
		    

			So for a sanity check, I decided to look
"online" and punch 
			      

		in some to see
		    

			what the "real" lat/long should be. Well,
different sites 
			      

		give different
		    

			values, and not only are they "slightly" off,
but sometimes they're
			_positive_ or _negative_!? UGH!
			      

		Not sure what your confusion is. It is a matter of
notation. The
		negative value represents West where it is negative (as
would be the
		East; note how there is no W mentioned there). 
		    

	
	
	  


Thread
Calculate LONG/LAT from ZIP+4Jack Lauman27 Jun
  • Re: Calculate LONG/LAT from ZIP+4Scott Gifford27 Jun
    • Re: Calculate LONG/LAT from ZIP+4Brian Dunning27 Jun
      • Re: Calculate LONG/LAT from ZIP+4Scott Gifford27 Jun
        • Re: Calculate LONG/LAT from ZIP+4Brian Dunning27 Jun
          • Re: Calculate LONG/LAT from ZIP+4Scott Gifford27 Jun
            • Re: Calculate LONG/LAT from ZIP+4Brian Dunning27 Jun
  • Re: Calculate LONG/LAT from ZIP+4Kieran Kelleher28 Jun
  • Re: Calculate LONG/LAT from ZIP+4Mattias Håkansson28 Jun
    • Re: Calculate LONG/LAT from ZIP+4Kieran Kelleher28 Jun
      • Re: Calculate LONG/LAT from ZIP+4Brian Dunning28 Jun
        • Re: Calculate LONG/LAT from ZIP+4Kieran Kelleher28 Jun
    • Re: Calculate LONG/LAT from ZIP+4Brian Dunning28 Jun
      • RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Daevid Vincent25 Apr
RE: Calculate LONG/LAT from ZIP+4Dirk Bremer28 Jun
RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Gmail User25 Apr
  • RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Daevid Vincent25 Apr
RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Gmail User25 Apr
  • RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Tim Lucia25 Apr
RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Nicolas Verhaeghe25 Apr
RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Jay Blanchard25 Apr
  • Re: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Webmaster25 Apr
  • RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Daevid Vincent25 Apr
RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Jay Blanchard26 Apr
Re: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Peter Brawley26 Apr
  • RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)SST - Adelaide)26 Apr
    • RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Nicolas Verhaeghe26 Apr
RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Nicolas Verhaeghe26 Apr
  • Re: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude) \"Adam i Agnieszka Gąsiorowski FNORD aka ALinkA aka symbol '( { .A. } )'' ||~> { A.A }\" 2 May
    • RE: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)Gary M. Allen3 May