I'm so confused. I'm finally getting around to needing to do a 'store
I procured myself some zip/lat/long databases from various places. Then I
noticed that for the same zip code, I got different values in different
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!
Seattle WA 98119 47.6388 122.3700
Location: 47.637917 N, 122.364272 W
State Abbreviation WA
So I try the east coast:
Penfield NY 14526 43.1532 77.4485
Location: 43.139638 N, 77.456043 W
State Abbreviation NY
State New York
Please help me to understand WTF is going on?
Which lat/long do I need?
How does the negatives effect the magic formulas to calculate distances?
(I'm no trig wiz).
I assume that the more precise the numbers, the better the results will be.
To what decimal point should I be concerned with?