Today, I tried the Google Latitude map service launched by Google. Latitude map service can determine the geographical location of the user according to the IP address of the user terminal or the base station currently used by the user's mobile phone, provided that the PC terminal needs to set Latitude service. Mobile users will need to install Google Latitude.
Google Latitude is currently only available in two dozen countries or regions, not including China. Google Latitude software is currently available for Android, S60, BlackBerry, Windows Mobile and other smartphone platforms, and does not support Iphone.