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

A 2011-2017 compilation of survey data provides spatially continuous predictions of seabed gravel content for the Darwin and Bynoe Harbour region. The dataset 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 an INPEX-led Ichthys LNG Project offset. Predictions are based on 395 samples and 14 environmental variables, presented as 10-meter resolution raster grids.

Use Cases

• Modeling benthic habitat distribution based on predicted gravel content.
• Informing marine spatial planning and conservation decisions based on the baseline seabed mapping program.
• Calibrating or validating other sediment prediction models based on the described high predictive accuracy (VEcv = 59%).
• Assessing changes in seabed composition over time using this superseded, improved prediction grid.

Strengths

• High-resolution 10-meter grid provides detailed spatial predictions.
• Predictive accuracy is quantified with a VEcv of 59% for gravel, representing a 68.4% improvement over a commonly used method.
• Based on a compilation of multiple surveys from 2011 to 2017, incorporating 395 samples.

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 for some analytical workflows.

Provenance

Source

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

Collection Method

Predictions derived from a compilation of multiple seabed surveys (e.g., GA0333, GA0341) between 2011 and 2017, using 14 environmental variables from multibeam sonar data.

Time Range

Survey data compiled from 2011 to 2017.

Freshness

Last updated 2026-06 04 06:11:13.162985; freshness should be verified.

Geography

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