Cool gadgets. Check out the video at the end of the piece. http://web.mit.edu/newsoffice/2012/automatic-building-mapping-0924.html Jim -- datalude: information security e: jim at datalude.com Philippines: +63 2 403 1311 / mob: +63 917 849 3939 Hong Kong: +852 5125 3392 w: http://www.datalude.com/