lets consult an expert Scholarly sourcepic.twitter.com/4J9TzfE4Fs
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
I'd say that seems correct :/
Stealing this bit for use in a few days when you hopefully won’t notice.
it is free for your used without attribution 
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.