Darwin Harbour Seabed Gravel Content Predictions at 10-Meter Resolution

Darwin and Bynoe Harbour regions in northern Australia have predicted seabed gravel content derived from 395 samples and 14 environmental variables. The 10-meter resolution raster grid was created by Geoscience Australia, AIMS, and the Northern Territory Government using data from surveys between 2011 and 2017. Predictive accuracy for gravel is reported as VEcv = 59%, representing a 68.4% improvement over a common interpolation method.

Use Cases

• Modeling seabed habitat distribution based on predicted gravel content.
• Informing marine resource management decisions based on baseline thematic maps.
• Benchmarking predictive accuracy of seabed composition models based on the reported VEcv metric.
• Analyzing spatial patterns of sediment composition in a harbor environment.

Strengths

• Predictive accuracy for gravel is quantified with a VEcv of 59%.
• Data is derived from 395 physical samples and 14 high-resolution environmental variables.
• Spatial resolution is 10 meters, providing detailed continuous predictions.
• The prediction method shows a 68.4% improvement over a commonly used interpolation technique.

Limitations

• Absences in predictions occur due to non-availability of 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 derived from a compilation of multiple seabed surveys (GA0333, GA0341, GA0351, GA4452, GA0356, GA0358, GA0359) undertaken between 2011 and 2017.

Time Range

Survey data from 2011 to 2017.

Freshness

Last updated 2026-03-25 16:32:39.754960; freshness should be verified.

Geography

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