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AUSGeoid98 v.1.0 data files: (si49-05)

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Created 20/01/2025

Updated 20/01/2025

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AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.

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Title AUSGeoid98 v.1.0 data files: (si49-05)
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/8840b449-a6eb-4ce9-be87-0e2263c8f5f2
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[108.0, -34.0], [109.5, -34.0], [109.5, -33.0], [108.0, -33.0], [108.0, -34.0]]]}
Data Portal data.gov.au