Australian Bathymetry and Topography Grid at 0.0025 Degree Resolution

Geoscience Australia compiled this 2009 bathymetry and topography grid for Australia and its Exclusive Economic Zone. The service integrates multibeam, single beam, digitised chart, and satellite-derived data, with a 0.0025-degree resolution where direct observations are dense. Topographic data is based on revised Australian and New Zealand grids and the 90m SRTM DEM.

Use Cases

• Modeling coastal erosion and inundation based on integrated onshore and offshore elevation data.
• Analyzing seafloor habitat suitability based on high-resolution bathymetry from multibeam and chart data.
• Creating 3D visualizations of the Australian continental shelf based on the gridded elevation model.
• Conducting hydrological flow analysis across the land-sea interface using the consistent topography grid.

Strengths

• Integrates multiple authoritative sources including Geoscience Australia grids and SRTM DEM.
• Provides high 0.0025-degree resolution in areas with dense direct observations like swath bathymetry.
• Covers a defined geographic area including Australia's onshore topography and EEZ bathymetry.

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 grid uses lower-resolution (1-2 arc minute) satellite-derived bathymetry in areas beyond the shelf.

Provenance

Source

Geoscience Australia and the Australian Ocean Data Network.

Collection Method

Compiled from multibeam, single beam, digitised chart, and satellite-derived (ETOPO) sources.

Time Range

Primarily 2009, with source grids from 2005, 2008, and 1997.

Freshness

Last updated 2026-05-04 23:54:05.095170; freshness should be verified.

Geography

Australia and the adjoining Australian Exclusive Economic Zone, excluding Heard and McDonald Islands and the Australian Antarctic Territory.