getting latitude and longitute information from a web visitor

Question

TO use google maps it seems you have to have the lat and long for a visitor to plot them on a map.

Are there any free libraries that will give you this information given a IP address?

Answer 1

Here's one: http://www.ip2location.com/developers.aspx

Of course, you're only going to get a rough idea of where the user probably is. If you're expecting the kind of accuracy that you see on crime shows you'll be sadly disappointed. :)

Answer 2

Check out geocoder.us and hostip.info