[snip]
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
databases??!!!
[/snip]
Latitudes and longitudes are often represented based on their location
relative to the equator and the prime meridian;
|
pos lat | pos lat
neg long | pos long
|
|
---------------------------------------------------
|
neg lat | neg lat
neg long | pos long
|
|
Sometimes the coordinates are based on positive distances (non-standard
lat/long) from the prim meridian and equator, yielding a pai of positive
numbers for each coordinate that would not be the same numbers as given
by the standard system.
Google Maps understands the standard system well, I do not know if it
understands the non-standard system
