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@rouault rouault commented Dec 8, 2024

Fine tune #4337 (comment)

@nich0lasbr0wn sorry for pinging, but I'd appreciate your opinion on the strategy to transform coordinates from 'GDA94 + AHD height' to 'GDA2020 to AVWS height' . This change in PROJ will cause it to go in 3 steps:

  • "GDA94 + AHD height" to "GDA94 (3D)" using the AUSGeoid09_V1.01 grid
  • "GDA94 (3D)" to "GDA2020 (3D)" using the Helmert transformation, in 3D, that is with ellipsoidal height change
  • "GDA2020 (3D)" to "GDA2020 + AVWS height" using the AGQG_20201120 grid.

Does that seem sound to you?

@rouault rouault added the funded through GSP Work funded through the GDAL Sponsorship Program label Dec 8, 2024
@rouault rouault merged commit e5e3a6b into OSGeo:master Dec 17, 2024
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