@socialbro as promised - Twitter as a platform for OPEN real time analytics" on Data Science Central: http://www.datasciencecentral.com/profiles/blogs/twitter-as-a-platform-for-open-real-time-analytics …
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