Tool or PHP code to convert IP address into lat/lng coordinates

Question

I have thousands of IP addresses of visitors to my site, what tools can I use to convert these into lat/lng coordinates? I will then be able visualise the data on a map with filters for further demographics gathered.

Answer 1

For one of my sites I made use of maxmind's free geolite country database which can be downloaded here: http://www.maxmind.com/app/geolitecountry

They also provide a city level version which includes the long/lat: http://www.maxmind.com/app/geolitecity

but note that the accuracy on the free version is a lot lower than the paid version.

Answer 2

this might also help http://articles.techrepublic.com.com/5100-10878_11-6103179.html