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
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Australia
i n v e n t
---------------------------------------------------------------
________________________________
From: Peter Brawley [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 26 April 2006 11:17 AM
To: Daevid Vincent
Cc: [email protected]
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:[EMAIL PROTECTED]
Sent: Tuesday, April 25, 2006 6:03 AM
To: [email protected]
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).
