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

Darwin and Bynoe Harbour regions have predicted seabed gravel content grids derived from multiple surveys between 2011 and 2017. The dataset provides spatially continuous predictions of seabed percent gravel content based on 395 samples and 14 environmental variables from multibeam sonar data. It was funded by an INPEX-led LNG project and developed by Geoscience Australia, the Australian Institute of Marine Science, and the Northern Territory Government.

Use Cases

• Creating thematic habitat maps based on predicted seabed substrate composition.
• Informing marine resource management decisions based on baseline environmental data.
• Modeling seabed characteristics using high-resolution bathymetry and backscatter variables.
• Assessing changes in seabed composition by comparing with future survey data.

Strengths

• Predictive accuracy is high, with a VEcv of 59% for gravel.
• Predictive accuracy was increased by 68.4% for gravel compared to a commonly used method (IDW).
• Data is presented in a 10-meter resolution raster grid format.

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

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

Collection Method

Derived from a compilation of multiple surveys (GA0333, GA0341, GA0351/SOL6187, GA4452/SOL6432, GA0356, GA0358, GA0359) undertaken between 2011 and 2017.

Time Range

Survey data collected between 2011 and 2017.

Freshness

Last updated 2026-06-23 04:01:19.100202; freshness should be verified.

Geography

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