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 from multibeam, single beam, and satellite-derived sources. The grid provides a 0.0025-degree resolution where direct observations are dense, such as from swath bathymetry or digitized charts. Topographic data onshore incorporates revised Australian and New Zealand grids along with a 90-meter SRTM DEM.

Use Cases

• Modeling coastal erosion and inundation based on integrated bathymetric and topographic elevation data.
• Analyzing seafloor morphology for marine habitat mapping using compiled multibeam and single beam observations.
• Creating base maps for maritime navigation and resource management within the Australian Exclusive Economic Zone.
• Conducting geophysical studies that require a seamless transition from terrestrial to marine elevation models.

Strengths

• Integrates multiple authoritative sources, including Geoscience Australia's 2009 bathymetry compilation and the 2008 revised topography grid.
• Provides high 0.0025-degree resolution in areas with dense direct observations like swath bathymetry.
• Covers a defined geographic area encompassing Australia's onshore topography and adjoining offshore bathymetry.

Limitations

• Column-level documentation is absent; field semantics must be inferred after accessing the service.
• The dataset excludes data from Australia's marine jurisdiction offshore from Heard and McDonald Islands and the Australian Antarctic Territory.
• In areas off the Australian shelf 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 bathymetry sources, integrated with topographic grids.

Time Range

Primary bathymetry data from 2009, with topographic grids from 2008.

Freshness

Last updated 2026-04-20 03:13:52.776216; freshness should be verified.

Geography

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