This article explains why it's off by 1.5 meters much better. http://www.abc.net.au/news/2016-07-28/aust-latitude-longitude-coordinates-out-by-1-5m-scientists/

This article explains why it's off by 1.5 meters much better. http://www.abc.net.au/news/2016-07-28/aust-latitude-longitude-coordinates-out-by-1-5m-scientists/7666858 http://www.abc.net.au/news/2016-07-28/aust-latitude-longitud...