It starts "Australia's coordinates are out by more than 1.5 metres", which is a link to http://www.abc.net.au/news/2016-07-28/aust-latitude-longitude-coordinate

It starts "Australia's coordinates are out by more than 1.5 metres", which is a link to 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... . That gives the reason for needing a new datum: "Because Australia sits on the fastest moving continental tectonic plate in the world, coordinates measured in the past continue changing over time. The continent is moving north by about 7 centimetres each year, colliding with the Pacific Plate, which is moving west about 11 centimetres each year." That's some zippy fast movement!