If you want some details from a more rigorous point of view, check out https://www.icsm.gov.au/gda2020/what-changing-and-why https://www.icsm.gov.au/gda2020/wh

If you want some details from a more rigorous point of view, check out https://www.icsm.gov.au/gda2020/what-changing-and-why https://www.icsm.gov.au/gda2020/what-changing-and-why Similar efforts are going on elsewhere, e.g. https://www.ngs.noaa.gov/datums/newdatums/TrackOurProgress.shtml https://www.ngs.noaa.gov/datums/newdatums/TrackOurProgress.s...