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Method: NTv2
Grid Files: CGQ77-98.gsb
Remarks: Also found with file name CQ77SCRS.GSB. Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27(CGQ77) (code 4609) and NAD83(CSRS) (code 4617) have longitudes positive east.
Information source: Geodetic Service of Quebec. Contact [email protected]
Revision date: 2023-07-17
Unit: degree
Geodetic CRS: NAD27(CGQ77)
Datum: North American Datum 1927 (CGQ77)
Ellipsoid: Clarke 1866
Prime meridian: Greenwich
Data source: EPSG
Information source: OGP
Revision date: 2002-11-22
Scope: Geodesy.
Remarks: See CRS code 4609 for recommended coordinate axis representation for the human interface.
Area of use: Canada - Quebec.
Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: dec deg
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