CRC-SI Project 114: Reconciling Bathymetric Height Datums in Australia

A research report from Geoscience Australia, last updated on 2026-04-30, focuses on reconciling vertical height datums for bathymetric data in Australia. It presents a methodology for calculating uncertainty for short-span Mean Sea Level observations relative to a long-term reference epoch. The work aims to aid in creating an ellipsoidal MSL surface with uncertainties and addresses datum disparities between terrestrial and marine datasets.

Use Cases

• Developing uncertainty models for coastal Mean Sea Level observations based on the described methodology.
• Integrating bathymetric and topographic datasets by reconciling Chart Datum and Australian Height Datum disparities mentioned in the description.
• Creating ellipsoidal height surfaces for satellite data applications spanning the land/sea interface as discussed in the report.
• Evaluating alternative tidal planes like Lowest Astronomical Tide for defining the intertidal zone in Australia.

Strengths

• Report is associated with a formal research project (CRC-SI Project 114) from Geoscience Australia.
• Focuses on a specific, documented problem of datum disparity between terrestrial and marine height references in Australia.
• Last updated date is explicitly provided as 2026-04-30 12:35:18.935751.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The report notes that methodologies for computing uncertainties of Lowest Astronomical Tide and Highest Astronomical Tide have not been developed.

Provenance

Source

Geoscience Australia Data

Collection Method

Research report presenting methodologies for datum reconciliation and uncertainty calculation.

Freshness

Last updated 2026-04-30 12:35:18.935751; freshness should be verified.

Geography

Australia