If you have data in the old datum, you just need to transform it to the new one. They provide the tools to do it: https://www.icsm.gov.au/australian-datums-an

If you have data in the old datum, you just need to transform it to the new one. They provide the tools to do it: https://www.icsm.gov.au/australian-datums-and-how-move-between-them https://www.icsm.gov.au/australian-datums-and-how-move-betwe... Data providers like Google may have already made the switch, or instead of using the static datums they might use a time-dependent datum where the coordinates change with time.