Post-Seismic AUV Seafloor Imagery from Gippsland Basin

Stereo camera imagery of the seafloor was collected at 12 sites in Australia's Gippsland Basin in June 2015, shortly after a seismic survey. The dataset includes geotiffs, track files, and image mosaics processed from an AUV-Phoenix vehicle operated by Australian Marine Ecology and the University of Sydney. It was created for the Gippsland Marine Environmental Monitoring project to assess potential impacts of seismic operations on scallops.

Use Cases

• Classify seafloor substrate and identify scallop presence from the 1388 x 1038 pixel geotiff images.
• Analyze changes in benthic habitat by comparing these 'short-term after' survey images with 'before' survey data from other GMEM components.
• Map survey transect paths and image locations using the provided geospatial track files.
• Assess image quality and coverage gaps caused by strobe failures noted at Stations 40 and 47.

Strengths

• High-resolution stereo imagery with 1388 x 1038 pixel resolution per camera.
• Data collected at 12 distinct stations with post-processed geotiffs and mosaics.
• Specific collection parameters: 2 Hz capture rate, 2 m target altitude, 1 m/s speed.

Limitations

• Sample size is limited to 12 usable sites, with truncated transects at 3 stations due to strong currents.
• Known data quality issues include strobe failures at Stations 40 and 47, reducing image usability.
• Temporal scope is narrow, covering only a one-week period in June 2015.

Provenance

Source

Australian Ocean Data Network via the Gippsland Marine Environmental Monitoring project.

Collection Method

Collected by an Iver AUV-Phoenix equipped with stereo CCD cameras, USBL, and sidescan sonar, with post-processing into geotiffs and mosaics.

Time Range

Survey conducted from 19-25 June 2015.

Freshness

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Geography

Gippsland Basin, Australia.