Thanks for the graph.
So are you saying that I should use the database that has the negative
and not the one that uses positive values?
I'm in the USA. I don't care about anywhere else (for my location needs
Yes, that would be using the proper notation for lat and long. To see it
in action take a look at http://maps.google.com. Enter an address with a
city, state and zip code (such as your own) and then click 'Link to This
Page'. Look at the URL and you will see properly notated coordinates.