• IRENET95

  EPSG:4173
  Area of use: Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.
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• Sierra Leone 1924

  EPSG:4174
  Area of use: Sierra Leone - Freetown Peninsula.
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• Sierra Leone 1968

  EPSG:4175 with transformation: 1614
  Area of use: Sierra Leone - onshore. (accuracy: 26.0)
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• Australian Antarctic

  EPSG:4176
  Area of use: Antarctica between 45°E and 136°E and between 142°E and 160°E - Australian sector.
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• Pulkovo 1942(83)

  EPSG:4178 with transformation: 15998
  Area of use: Czechia; Slovakia. (accuracy: 5.0)
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• Pulkovo 1942(58)

  EPSG:4179 with transformation: 15995
  Area of use: Romania - onshore and offshore. (accuracy: 3.0)
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• EST97

  EPSG:4180
  Area of use: Estonia - onshore and offshore.
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• LUREF

  EPSG:4181
  Area of use: Luxembourg.
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• Azores Occidental 1939

  EPSG:4182 with transformation: 1982
  Area of use: Portugal - western Azores onshore - Flores, Corvo. (accuracy: 5.0)
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• Azores Central 1948

  EPSG:4183 with transformation: 1886
  Area of use: Portugal - central Azores onshore - Faial, Graciosa, Pico, Sao Jorge, Terceira. (accuracy: 6.0)
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