Australian Bathymetry and Topography Grids at 0.0025 Degree Resolution

Geoscience Australia compiled this 2009 bathymetry grid from multibeam, single beam, and satellite-derived data for the Australian Exclusive Economic Zone. The onshore topography grid integrates revised Australian and New Zealand topography grids with 90m SRTM DEM data. The service provides a seamless elevation model for the continent and its adjoining waters, excluding offshore Antarctic territories.

Use Cases

• Model coastal inundation and sea-level rise impacts based on the integrated bathymetry and topography elevation grid.
• Analyze seafloor morphology and shelf structure based on compiled multibeam and single beam bathymetric observations.
• Create regional geophysical maps by combining the high-resolution onshore grid with offshore satellite-derived bathymetry.

Strengths

• Integrates multiple authoritative sources including Geoscience Australia's 2008 topography grid and 90m SRTM DEM.
• Provides 0.0025 degree resolution where direct bathymetric observations are sufficiently dense.
• Seamlessly covers the Australian continent and its Exclusive Economic Zone in a single service.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The area selected excludes data from Australia's marine jurisdiction offshore from the Territory of Heard and McDonald Islands and the Australian Antarctic Territory.
• In offshore areas without sounding data, the grid is based on lower-resolution (1-2 arc minute) satellite-derived bathymetry.

Provenance

Source

Australian Ocean Data Network, Geoscience Australia

Collection Method

Compiled from multibeam, single beam, digitised chart, and satellite-derived bathymetry data, along with multiple topographic grid sources.

Time Range

Bathymetry data from 2009 compilation; source topography grids from 2008.

Freshness

Last updated 2026-04-10 19:45:49.977481; freshness should be verified.

Geography

Topography of Australia and bathymetry of the adjoining Australian Exclusive Economic Zone.