• NAD27 to NAD83(HARN) (17)

  EPSG:8476
  Area of use: United States (USA) - Connecticut; Massachusetts; New Hampshire; Rhode Island; Vermont.
  

• NAD27 to WGS 84 (53)

  EPSG:8606
  Area of use: United States (USA) - Connecticut; Massachusetts; New Hampshire; Rhode Island; Vermont.
  

• NGVD29 height (ftUS) to NAVD88 height (3)

  EPSG:7975
  Area of use: United States (USA)
  

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Type of results

• Coordinate reference systems (1761)

•    Projected (1710)
•    Geodetic (12)
•    Geodetic 3D (13)
•    Geocentric (12)
•    Vertical (7)
•    Compound (7)

• Operation (68)

•    Transformation (45)
•    Compound (4)
•    Conversion (19)

• Datum (10)

•    Vertical (2)
•    Geodetic (8)

• Area (33)