Australian Bathymetry and Topography Grid, June 2009

• Other Authors: Commonwealth of Australia (Geoscience Australia) (distributor), Commonwealth of Australia (Geoscience Australia) (owner), Commonwealth of Australia (Geoscience Australia) (pointOfContact), Geoscience Australia (publisher), Manager Client Services (custodian), Nichol, S. (pointOfContact), Whiteway, T. (author)
• Format: Dataset
• Language: unknown
• Published: Geoscience Australia
• Subjects: geoscientificInformation; HVC_146413; Marine Data; Bathymetry Grid; bathymetry; data; National dataset; marine; AU-EEZ; Marine Geoscience; EARTH SCIENCES; GEOLOGY; AusSeabed; Published_External; New Zealand; Macquarie Island
• Online Access: https://researchdata.edu.au/australian-bathymetry-topography-june-2009/1278166; https://pid.geoscience.gov.au/dataset/ga/67703; https://doi.org/10.4225/25/53D99B6581B9A

Maintenance and Update Frequency: notPlanned Statement: The data came from a variety of systems with differing data densities and levels of accuracy. In the geographic extents 34°N - 79°S, 90°E - 180°E, GA holds approximately 1400 surveys that collected bathymetric data. This product documents the procedures used to construct the bathymetric grid and their associated displays. The input data were derived from a number of sources, were of variable vintages and quality. A number of approaches were required to process, check and edit the data. The availability of data also varied considerably throughout the region, effectively restricting the maximum useful resolution of the grid in areas where no soundings exist, to that of the satellite predicted bathymetry that was used as infill. Acknowledgements: The Digital Elevation Model (DEM) for New Zealand is based on the 250m DEM data supplied by Geographx, New Zealand (www.geographx.co.nz). The DEM's for Indonesian and Papua New Guinea are based on the SRTM DEM data supplied by the CGIAR Consortium (srtm.csi.cgiar.org/). The deep ocean data (where high resolution data were not available) is based on the ETOPO1 and ETOPOV2G data supplied by the National Geophysical Data Center, US Department of Commerce (NGDC) (www.ngdc.noaa.gov/). In 2005 Geoscience Australia and the National Oceans Office undertook a joint project to produce a consistent, high-quality 9 arc second (0.0025° or ~250m at the equator) bathymetric grid for Australian waters. In 2009 a number of new datasets were included in an updated version of the grid. The 2009 bathymetric grid of Australia has been produced to include recently acquired datasets, and solutions to issues identified in the previous version. The revised grid has the same extents as its 2005 counterpart, including the Australian water column jurisdiction lying between 92° E and 172° E, and 8° S and 60° S. The waters adjacent to the continent of Australia and Tasmania are included, as are areas surrounding Macquarie Island, and the ...