(c) 2012 Dave Troy (@davetroy)
Simple Processing sketch to allow visualization of simple geo-based trails through time. Currently ingests a csv file of tweets in the format of: screen_name,timestamp,lat,lon and displays them as geo trails on a basemap.
Create a Mercator-projection basemap using TileMill (http://tilemill.com) as per: http://tillnagel.com/2011/06/tilemill-for-processing/
Trails are displayed with a persistence-of-vision effect and gradually fade out. The sketch is rendered at a target frame rate of 30fps and each frame loads a certain number of seconds worth of tweets to display (currently 287 seconds). The sketch will stop running when it runs out of tweets.