From Geoscience Australia
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A provisional isogonic map of Australia and New Guinea for the epoch 1950.5

Created 17/10/2025

Updated 17/10/2025

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A provisional Isogonic Map of Australia and New Guinea for the epoch 1950.5 has been prepared by revising the observational material used in the Isogonic Map for 1942.5, and including observations made at various parts of Australia since 1942. The extensions of the Isogonic Lines beyond the coast line of Australia depend almost entirely on extrapolation from the earlier work.

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Additional Info

Field Value
Title A provisional isogonic map of Australia and New Guinea for the epoch 1950.5
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/30d0679b-bf13-4942-9db8-c4e54a7bdb23
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        108.0,
        -44.0
      ],
      [
        169.0,
        -44.0
      ],
      [
        169.0,
        0.0
      ],
      [
        108.0,
        0.0
      ],
      [
        108.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "A provisional isogonic map of Australia and New Guinea for the epoch 1950.5". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/a-provisional-isogonic-map-of-australia-and-new-guinea-for-the-epoch-1950-5