From Geoscience Australia
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

AUSGeoid98 v.1.0 data files: (sd54-09)

Created 17/10/2025

Updated 17/10/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

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 Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places.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.

Files and APIs

Tags

Additional Info

Field Value
Title AUSGeoid98 v.1.0 data files: (sd54-09)
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/e50e89e2-a4c2-4a46-b4ee-f0882137f132
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        138.0,
        -15.0
      ],
      [
        139.5,
        -15.0
      ],
      [
        139.5,
        -14.0
      ],
      [
        138.0,
        -14.0
      ],
      [
        138.0,
        -15.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "AUSGeoid98 v.1.0 data files: (sd54-09)". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/ausgeoid98-v-1-0-data-files-sd54-09