North American Datum 1927 (CGQ77)

Attributes

Prime meridian: Greenwich

Data source: EPSG

Information source: Geodetic Service of Quebec. Contact alain.bernard@mrn.gouv.qc.ca

Revision date: 2008-06-24

Scope: Geodesy, cadastre, engineering survey, topographic mapping.

Remarks: NAD27 (CGQ77) used in Quebec for all maps at scale 1/20 000 and larger; generally for maps issued by the Quebec cartography office whose reference system is CGQ77.

Area of use: Canada - Quebec.

Covered area powered by MapTiler

WGS84 bounds:
-57.1 44.99
-79.85 62.62

Definition: OGC Well Known Text

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DATUM["North_American_Datum_1927_CGQ77",
    SPHEROID["Clarke 1866",6378206.4,294.978698213898,
        AUTHORITY["EPSG","7008"]],
    AUTHORITY["EPSG","6609"]]

Definition: OGC Well Known Text 2 (2019)

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DATUM["North American Datum 1927 (CGQ77)",
    ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
        LENGTHUNIT["metre",1]],
    ID["EPSG",6609]]

Definition: ESRI Well Known Text

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DATUM["D_NAD_1927_CGQ77",
    SPHEROID["Clarke_1866",6378206.4,294.978698213898]]

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeodeticReferenceFrame",
    "name": "North American Datum 1927 (CGQ77)",
    "ellipsoid": {
        "name": "Clarke 1866",
        "semi_major_axis": 6378206.4,
        "semi_minor_axis": 6356583.8
    },
    "scope": "Geodesy, cadastre, engineering survey, topographic mapping.",
    "area": "Canada - Quebec.",
    "bbox": {
        "south_latitude": 44.99,
        "west_longitude": -79.85,
        "north_latitude": 62.62,
        "east_longitude": -57.1
    },
    "id": {
        "authority": "EPSG",
        "code": 6609
    }
}

Definition: GeoServer

6609-datum=DATUM["North_American_Datum_1927_CGQ77",SPHEROID["Clarke 1866",6378206.4,294.978698213898,AUTHORITY["EPSG","7008"]],AUTHORITY["EPSG","6609"]]

EPSG:6609