Darwin Harbour Seabed Mud Content Predictions at 10-Meter Resolution

Geoscience Australia's Darwin Harbour Habitat Mapping Program provides a predicted seabed mud content grid for the Darwin and Bynoe Harbour regions. The dataset is a 10-meter resolution raster derived from 395 samples and nine environmental variables, compiled from multiple surveys conducted between 2011 and 2017. It supersedes previous predictions with a demonstrated improvement in predictive accuracy, achieving a VEcv of 62% for mud.

Use Cases

• Modeling seabed sediment distribution based on predicted mud content percentages.
• Creating thematic habitat maps for marine environments based on sediment composition.
• Informing marine resource management decisions using spatially continuous predictions of mud content.
• Benchmarking predictive accuracy improvements against common interpolation methods like IDW.

Strengths

• Predictive accuracy is quantified with a VEcv of 62% for mud.
• Predictive accuracy was increased by 198.3% for mud compared to the commonly used IDW method.
• Data is based on a compilation of multiple surveys from 2011 to 2017, incorporating 395 samples.
• Spatial resolution is specified as 10 meters.

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 and total file size are unknown, which may limit suitability assessment.

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 a compilation of multiple surveys (e.g., GA0333, GA0341, GA0351, GA4452, GA0356, GA0358, GA0359) using nine environmental variables from multibeam sonar bathymetry and backscatter data.

Time Range

Surveys conducted between 2011 and 2017.

Freshness

Last updated 2026-03-25 16:45:22.879330; freshness should be verified.

Geography

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