Predicted Seabed Gravel Content for Darwin Harbour, 10m Resolution

395 seabed samples and 14 environmental variables were used to create a 10-meter resolution raster grid predicting seabed gravel content (>2000 µm) for the Darwin and Bynoe Harbour regions. The dataset was compiled from surveys conducted by Geoscience Australia, the Australian Institute of Marine Science, and the Northern Territory Government's Department of Environment and Natural Resources between 2011 and 2017. It supersedes previous predictions with a demonstrated 68.4% improvement in predictive accuracy for gravel.

Use Cases

• Create thematic habitat maps based on predicted seabed gravel content.
• Underpin marine resource management decisions using spatially continuous predictions of seabed composition.
• Analyze seabed sediment distribution patterns based on high-resolution multibeam sonar-derived environmental variables.
• Validate and improve sediment prediction models using the dataset's reported high accuracy (VEcv = 59% for gravel).

Strengths

• High predictive accuracy reported with a VEcv of 59% for gravel.
• Predictive accuracy improved by 68.4% for gravel compared to a commonly used method.
• Data is derived from 395 samples and 14 environmental variables from high-resolution multibeam sonar.
• Provides spatially continuous predictions at a 10-meter resolution.

Limitations

• Absences in predictions occur due to non-availability of associated predictive variables.
• Row count and column-level documentation are unknown, limiting suitability assessment.
• Freshness should be verified; last metadata update was 2026-04-16.

Provenance

Source

Australian Ocean Data Network, aggregating data from Geoscience Australia, Australian Institute of Marine Science, and Northern Territory Government's Department of Environment and Natural Resources.

Collection Method

Predicted grid derived from a compilation of multiple seabed surveys between 2011 and 2017.

Time Range

Survey data collected between 2011 and 2017.

Freshness

Last updated 2026-04-16 16:10:33.771509; freshness should be verified.

Geography

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