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. 

-----Original Message-----
From: Gmail User [mailto:nowuknow@gmail.com] 
Sent: Tuesday, April 25, 2006 6:03 AM
To: mysql@lists.mysql.com
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).