• Puerto Rico

  EPSG:4139 with transformation: 1893
  Area of use: Puerto Rico, US Virgin Islands and British Virgin Islands - onshore. (accuracy: 6.0)
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• NAD83

  EPSG:4269 with transformation: 1188
  Area of use: North America (accuracy: 4.0)
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• NAD27

  EPSG:4267 with transformation: 1693
  Area of use: Canada (accuracy: 2.0)
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• WGS 84 - WGS84 - World Geodetic System 1984, used in GPS

  EPSG:4326
  Area of use: World
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• Coordinate reference systems (20)

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•    Geodetic (7)
•    Geodetic 3D (3)
•    Geocentric (4)

• Operation (10)

•    Transformation (8)
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• Datum (3)

•    Geodetic (3)

• Area (7)