Predicted Seabed Gravel Content for Darwin Harbour at 10m Resolution

395 seabed samples and 14 environmental variables were used to create a spatially continuous prediction of seabed gravel content for the Darwin and Bynoe Harbour regions. This 10-meter resolution raster grid was produced by Geoscience Australia, the Australian Institute of Marine Science, and the Northern Territory Government's Department of Environment and Natural Resources, using data from surveys conducted between 2011 and 2017. Predictive accuracy for gravel content is reported as VEcv = 59%, representing a 68.4% improvement over a commonly used interpolation method.

Use Cases

• Modeling benthic habitats based on predicted seabed gravel content.
• Informing marine resource management decisions using baseline environmental data.
• Assessing sediment distribution patterns from high-resolution multibeam sonar-derived variables.
• Validating and improving seabed property prediction methodologies.

Strengths

• Predictive accuracy for gravel is quantified with a VEcv of 59%.
• Model performance improved by 68.4% for gravel compared to a common baseline method (IDW).
• Data is derived from a compilation of multiple surveys conducted over a 6-year period (2011-2017).
• Spatial predictions are provided at a 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, Australian Institute of Marine Science, Northern Territory Government Department of Environment and Natural Resources.

Collection Method

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

Time Range

Survey data compiled from 2011 to 2017.

Freshness

Last updated 2026-04-30 12:37:24.728750; freshness should be verified.

Geography

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