Geodesy, cadastre, engineering survey, topographic mapping.
NAD27(76) used in Ontario for all maps at scale 1/20 000 and larger; elsewhere in Canada for selected purposes.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "North American Datum 1927 (1976)", "ellipsoid": { "name": "Clarke 1866", "semi_major_axis": 6378206.4, "semi_minor_axis": 6356583.8 }, "scope": "Geodesy, cadastre, engineering survey, topographic mapping.", "area": "Canada - Ontario.", "bbox": { "south_latitude": 41.67, "west_longitude": -95.16, "north_latitude": 56.9, "east_longitude": -74.35 }, "id": { "authority": "EPSG", "code": 6608 } }