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AUSGeoid98 v.1.0 data files: Portland (sj54-11)

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Created 10/02/2025

Updated 10/02/2025

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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 Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places.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: Portland (sj54-11)
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/c51485c3-41f2-4eb2-8fea-3b3d6dde86de
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[141.0, -39.0], [142.5, -39.0], [142.5, -38.0], [141.0, -38.0], [141.0, -39.0]]]}
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