http://www.gcmap.com/mapui?P=JNB-SYD&MP=polar&DU=mi http://www.gcmap.com/mapui?P=JNB-SYD&MP=polar&DU=mi ? There's an easy way to make all routes between pairs

http://www.gcmap.com/mapui?P=JNB-SYD&MP=polar&DU=mi http://www.gcmap.com/mapui?P=JNB-SYD&MP=polar&DU=mi ? There's an easy way to make all routes between pairs of points look sensible at once: plot them on a 3D globe ;)