Reverse Geocoding

Most mapping softwares associate a physical address to a latitude and longitude tuple. This is called geocoding. With Google Maps and its API you can do geocoding on the server with the HTTP geocoding service or on the client with GClientGeocoder. With the latitude and longitude in place, its easy to position the spot on a map. The reverse of this would be to associate a physical address to a latitude and longitude tuple, and this is quite logically called reverse geocoding. Meetways.com is using this reverse geocoding facility to find physical addresses corresponding to destinations in and around the middle of two starting points. So if you and your friend wanted to meet up at a spot which was almost equidistant for both of you, then you could use something like Meetways. In addition, Pamela Fox of the Google Maps team has created a fun game of guessing addresses marked on a map. The correct answers are determined using, you know it — reverse geocoding. (Source: Reverse Geocoding With Google Maps)