GPS drawing article in NYTimes (2009): http://www.nytimes.com/2009/08/20/fashion/20GPS.html
Blog of Featured Artist group in article: http://blog.everytrail.com/
Self portrait by Erik Nordenaker (2008): http://www.ghacks.net/2008/05/24/gps-drawing/
Blog of Tokyo-based GPS-drawer/runner: http://josephta.me/