Predicted Seabed Gravel Content for Darwin and Bynoe Harbour, 10m Resolution

Darwin and Bynoe Harbour regions in northern Australia have a predicted seabed gravel content grid derived from multiple surveys between 2011 and 2017. The dataset provides spatially continuous predictions of seabed percentage gravel content at a 10-meter resolution, based on 395 samples and 14 environmental variables from multibeam sonar data. It was created by Geoscience Australia, the Australian Institute of Marine Science, and the Northern Territory Government's Department of Environment and Natural Resources, funded by the INPEX-led Ichthys LNG Project.

Use Cases

• Create thematic habitat maps based on predicted seabed gravel content.
• Model marine environments for resource management decisions using the 14 environmental variables.
• Compare predictive accuracy of seabed composition methods using the reported VEcv of 59% for gravel.
• Analyze spatial patterns of seabed composition in the harbour region using the 10-meter resolution raster grid.

Strengths

• Predictive accuracy for gravel is reported as high, with a VEcv of 59%.
• Predictive accuracy was increased by 68.4% for gravel compared to a commonly used interpolation method.
• Data is derived from a compilation of multiple surveys conducted between 2011 and 2017, providing a robust baseline.
• Spatially continuous predictions are provided at a high 10-meter resolution.

Limitations

• Absences in predictions occur due to non-availability of associated predictive variables.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Geoscience Australia (GA), Australian Institute of Marine Science (AIMS), Northern Territory Government's Department of Environment and Natural Resources (NTG-DENR).

Collection Method

Predictions derived from 395 samples and 14 environmental variables from high-resolution multibeam sonar bathymetry and backscatter data.

Time Range

Surveys conducted between 2011 and 2017.

Freshness

Last updated 2026-04-10 19:49:23.677586; freshness should be verified.

Geography

Greater Darwin Harbour region, including Darwin and Bynoe Harbour, northern Australian marine margin.