Australian Bathymetry and Topography Grid at 0.0025 Degree Resolution

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

Use Cases

• Modeling coastal inundation and sea-level rise based on integrated topography and bathymetry.
• Analyzing seabed morphology for marine geology based on compiled multibeam and single beam data.
• Creating base maps for maritime navigation based on digitized chart data and satellite-derived bathymetry.
• Conducting regional geophysical studies based on the high-resolution grid where direct observations exist.

Strengths

• Integrates multiple authoritative sources including Geoscience Australia's 2009 bathymetry compilation and the 90m SRTM DEM.
• Provides a 0.0025-degree resolution grid where direct bathymetric observations are sufficiently dense.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The area selected does not include data from Australia's marine jurisdiction offshore from Heard and McDonald Islands and the Australian Antarctic Territory.
• In areas without sounding data, the grid is based on lower-resolution (1-2 arc minute) satellite-derived bathymetry.

Provenance

Source

Geoscience Australia Data

Collection Method

Compiled from multibeam, single beam, digitized chart, and satellite-derived sources.

Time Range

Primary bathymetry data from 2009; incorporates topography grids from 2008.

Freshness

Last updated 2026-03-25 15:28:40.064083; freshness should be verified.

Geography

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