triangular lattice, square lattice, point visibilitypic.twitter.com/0GFPtThNkV
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
k. i first saw the patterns you are talking about in a tracer i was coding -- that is the only reason i thought "raytracer"
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.