• Helle 1954

  EPSG:4660 with transformation: 1957
  Area of use: Jan Mayen - onshore. (accuracy: 1.0)
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• ETRS89

  EPSG:4258
  Area of use: Europe
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• WGS 84 - WGS84 - World Geodetic System 1984, used in GPS

  EPSG:4326
  Area of use: World
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