XC Planner Copyright © 2009, 2010 Tom Payne <twpayne@gmail.com>
XContest Airspace and SkyWays data © XContest 2008, 2009
http://github.com/twpayne/xcplanner/
Thanks to: Manolis Andreadakis · Victor Berchet · Petr Chromec · Alex Graf · Marcus Kroiss · Jonty Lawson · Marc Poulhies