Test points for:Custom NTv2 grid file available for download from Custom NTv2-CPD-plus-LordHowe-Norfolk grid file (nsw.gov.au)(Grid filename: gda94_gda2020_CPD_plus_lordhowe_norfolk.gsb) (updated 05
AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use you