Introduction to Geo technologies with (amongst others) Yahoo techology, by Chris Hellmann: http://bit.ly/aiOXmW
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Introduction to Geo technologies with (amongst others) Yahoo techology, by Chris Hellmann: http://bit.ly/aiOXmW