Ellipsoid: Clarke 1866 Michigan
Prime meridian: Greenwich
Data source: EPSG
Information source: OGP
Revision date: 2000-05-03
Scope: Not a valid datum.
Remarks: Included for coordinate reference systems where datum is unknown.
Area of use: Not specified.
Definition: OGC Well Known Text
DATUM["Not_specified_based_on_Clarke_1866_Michigan_ellipsoid", SPHEROID["Clarke 1866 Michigan",6378450.0475489,294.978697164677, AUTHORITY["EPSG","7009"]], AUTHORITY["EPSG","6009"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Not specified (based on Clarke 1866 Michigan ellipsoid)", ELLIPSOID["Clarke 1866 Michigan",20926631.531,294.978697164677, LENGTHUNIT["US survey foot",0.304800609601219]], ID["EPSG",6009]]
Definition: ESRI Well Known Text
DATUM["D_Clarke_1866_Michigan", SPHEROID["Clarke_1866_Michigan",6378450.0475489,294.978697164677]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Not specified (based on Clarke 1866 Michigan ellipsoid)", "ellipsoid": { "name": "Clarke 1866 Michigan", "semi_major_axis": { "value": 20926631.531, "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 } }, "semi_minor_axis": { "value": 20855688.674, "unit": { "type": "LinearUnit", "name": "US survey foot", "conversion_factor": 0.304800609601219 } } }, "scope": "Not a valid datum.", "area": "Not specified.", "bbox": { "south_latitude": -90, "west_longitude": -180, "north_latitude": 90, "east_longitude": 180 }, "id": { "authority": "EPSG", "code": 6009 } }