Carnarvon Shelf Reef Polygons Digitized from 2008 Marine Survey

Reef polygons for the Carnarvon Shelf were manually digitized from multibeam echosounder data collected on marine survey GA0308 in August and September 2008. The dataset defines reef areas as exposed, hard substrate often raised above the surrounding seafloor, mapped at a scale of 1:10,000 using bathymetry, backscatter, and derivatives. It is published by Geoscience Australia via the Australian Ocean Data Network.

Use Cases

• Map the distribution of hard substrate reef habitats based on the defined polygon features.
• Analyze seafloor geomorphology using the bathymetric derivatives like slope and contours mentioned in the description.
• Model marine ecosystem connectivity by using the reef polygons as a base layer for habitat analysis.
• Validate automated seafloor classification algorithms against manually digitized reef boundaries.

Strengths

• Features were mapped at a detailed scale of 1:10,000.
• Data sources include multibeam echosounder bathymetry and backscatter data.
• Polygons were manually digitized, which may indicate expert validation.

Limitations

• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data is from a single survey in 2008; temporal coverage is limited.

Provenance

Source

Geoscience Australia, via the Australian Ocean Data Network.

Collection Method

Manual digitization from multibeam echosounder datasets collected on marine survey GA0308.

Time Range

August/September 2008

Freshness

Last updated 2026-06-05 06:05:10.618272; freshness should be verified.

Geography

Carnarvon Shelf, Australia