Darwin Harbour Seabed Gravel Content Predictions at 10m Resolution

A 2011-2017 compilation of surveys funded by INPEX, NTG-DENR, Geoscience Australia, and AIMS provides predicted seabed gravel content for Darwin and Bynoe Harbour. The dataset contains spatially continuous predictions of seabed %gravel (>2000 µm) content in 10 m resolution raster grids and ASCII text format. Predictions are based on 395 samples and 14 environmental variables derived from high-resolution multibeam sonar data.

Use Cases

• Creating thematic habitat maps based on predicted seabed gravel content.
• Underpinning marine resource management decisions based on baseline environmental data.
• Analyzing seabed composition patterns based on 14 environmental variables from multibeam sonar.
• Comparing predictive accuracy of gravel content against interpolation methods like IDW.
• Identifying areas with data absences due to unavailable predictive variables.

Strengths

• Predictive accuracy is high, with a VEcv of 59% for gravel.
• Predictive accuracy increased by 68.4% for gravel compared to the commonly used IDW method.
• Data supersedes previous predictions with demonstrated improvements in accuracy.
• Based on a compilation of multiple surveys from 2011 to 2017.

Limitations

• Absences in predictions occur due to non-availability of associated predictive variables.
• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Australian Ocean Data Network, aggregating data from Geoscience Australia, Australian Institute of Marine Science, and NTG-DENR.

Collection Method

Derived from a compilation of multiple surveys, predictions based on 395 samples and 14 environmental variables from multibeam sonar.

Time Range

Surveys conducted between 2011 and 2017.

Freshness

Last updated 2026-05-05 01:35:29.937065; freshness should be verified.

Geography

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