Lee, Jae HeeRenz, JochenWolter, Diedrich2015-12-10August 3-99781577356332http://hdl.handle.net/1885/61882Relative direction information is very commonly used. Observers typically describe their environment by specifying the relative directions in which they see other objects or other people from their point of view. Or they receive navigation instructions wiAuthor/s retain copyright20132015-12-10