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
Twitter is funding a small independent team of up to five open source architects, engineers, and designers to develop an open and decentralized standard for social media. The goal is for Twitter to ultimately be a client of this standard. 
After years of fighting or ignoring open protocols, it is about time that Twitter embraced open protocols. Hopefully, you will not ignore the work done before. Among the protocols you should study/adopt are Salmon http://www.salmon-protocol.org/ which was once driven by @jpanzer
