Re: Calculate LONG/LAT from ZIP+4 (positve vs. negative longitude)

[Peter Brawley]

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:[EMAIL PROTECTED]] 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).

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