gbr100: High-Resolution Bathymetry for the Great Barrier Reef and Coral Sea

The gbr100 dataset is a high-resolution bathymetry and Digital Elevation Model (DEM) covering the Great Barrier Reef, Coral Sea and neighbouring Queensland coastline. Developed as part of the 3DGBR project, it integrates multibeam, singlebeam, lidar and satellite bathymetry source datasets. The grid has a pixel size of 0.001-arc degrees (~100m) with a horizontal datum of WGS84 and a vertical datum of Mean Sea Level.

Use Cases

• Analyzing seabed geomorphic shape and spatial relationships based on the high-resolution bathymetry grid.
• Mapping ocean floor features for marine spatial planning based on the 100m contour shapefile.
• Assessing vertical uncertainty in depth measurements based on the Total Vertical Uncertainty (TVU) grid.
• Creating visualizations of underwater terrain based on the derived hillshading layers.

Strengths

• High-resolution grid with a pixel size of approximately 100 meters.
• Integrates multiple modern data sources including multibeam, singlebeam, lidar, and satellite bathymetry.
• Provides a Total Vertical Uncertainty (TVU) grid for error estimation.
• Available in multiple geospatial formats including ESRI raster, GMT/netCDF, and GeoTiff.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to the specific study area.

Provenance

Source

Australian Ocean Data Network, developed as part of the 3DGBR project.

Collection Method

Gridding process utilizing multibeam, singlebeam, lidar, and satellite bathymetry source datasets from government agencies and research expeditions.

Freshness

Last updated 2026-07-16 11:59:07.052544; freshness should be verified.

Geography

Great Barrier Reef, Coral Sea, and neighbouring Queensland coastline.