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

Geoscience Australia's Darwin Harbour Habitat Mapping Program provides a predicted seabed gravel content grid for the Darwin and Bynoe Harbour regions. The dataset is a 10-meter resolution raster derived from 395 samples and 14 environmental variables collected in surveys between 2011 and 2017. It supersedes previous predictions with a demonstrated improvement in predictive accuracy, achieving a VEcv of 59% for gravel.

Use Cases

• Modeling seabed habitat types based on predicted gravel content.
• Informing marine spatial planning and conservation efforts using the high-resolution spatial grid.
• Validating and improving sediment prediction methods by comparing the model's 68.4% accuracy improvement over IDW interpolation.
• Assessing potential impacts of coastal development using the baseline environmental data.

Strengths

• Predictive accuracy is quantified with a VEcv of 59% for gravel.
• Model performance improved by 68.4% for gravel compared to a commonly used interpolation method (IDW).
• Data is based on a compilation of multiple scientific surveys conducted between 2011 and 2017.
• Spatial predictions are provided at a 10-meter resolution.

Limitations

• Absences in predictions occur due to non-availability of associated predictive variables.
• Row count and specific column definitions are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data structure and additional quality metrics require manual inspection after download.

Provenance

Source

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

Collection Method

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

Time Range

Survey data compiled from projects conducted between 2011 and 2017.

Freshness

Last updated 2026-04-20 02:23:48.316571; freshness should be verified.

Geography

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