EPSG:4268 DEPRECATED

NAD27 Michigan

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: NAD27 Michigan

Datum: NAD27 Michigan

Ellipsoid: Clarke 1866 Michigan

Prime meridian: Greenwich

Data source: EPSG

Information source: USGS Professional Paper #1395.

Revision date: 2011-02-25

Scope: Geodesy.

Remarks: Ellipsoid taken to be 800ft above the NAD27 reference ellipsoid. Note: this coordinate reference system includes longitudes which are POSITIVE EAST.

Area of use: United States (USA) - Michigan.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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SimpleMap

Center coordinates
-86.28 45.0

WGS84 bounds:
-90.42 41.69
-82.13 48.32

United States (USA) - Michigan.
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Definition: OGC Well Known Text

GEOGCS["NAD27 Michigan (deprecated)",
    DATUM["NAD27_Michigan",
        SPHEROID["Clarke 1866 Michigan",6378450.0475489,294.978697164677,
            AUTHORITY["EPSG","7009"]],
        AUTHORITY["EPSG","6268"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4268"]]

Definition: OGC Well Known Text 2 (2019)

GEOGCRS["NAD27 Michigan",
    DATUM["NAD27 Michigan",
        ELLIPSOID["Clarke 1866 Michigan",20926631.531,294.978697164677,
            LENGTHUNIT["US survey foot",0.304800609601219]]],
    PRIMEM["Greenwich",0,
        ANGLEUNIT["degree",0.0174532925199433]],
    CS[ellipsoidal,2],
        AXIS["geodetic latitude (Lat)",north,
            ORDER[1],
            ANGLEUNIT["degree",0.0174532925199433]],
        AXIS["geodetic longitude (Lon)",east,
            ORDER[2],
            ANGLEUNIT["degree",0.0174532925199433]],
    USAGE[
        SCOPE["Geodesy."],
        AREA["United States (USA) - Michigan."],
        BBOX[41.69,-90.42,48.32,-82.13]],
    ID["EPSG",4268]]

Definition: ESRI Well Known Text

GEOGCS["GCS_North_American_Michigan",
    DATUM["D_North_American_Michigan",
        SPHEROID["Clarke_1866_Michigan",6378450.0475489,294.978697164677]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +a=6378450.0475489 +b=6356826.62148844 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4268","+proj=longlat +a=6378450.0475489 +b=6356826.62148844 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "NAD27 Michigan",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "NAD27 Michigan",
        "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
                }
            }
        }
    },
    "coordinate_system": {
        "subtype": "ellipsoidal",
        "axis": [
            {
                "name": "Geodetic latitude",
                "abbreviation": "Lat",
                "direction": "north",
                "unit": "degree"
            },
            {
                "name": "Geodetic longitude",
                "abbreviation": "Lon",
                "direction": "east",
                "unit": "degree"
            }
        ]
    },
    "scope": "Geodesy.",
    "area": "United States (USA) - Michigan.",
    "bbox": {
        "south_latitude": 41.69,
        "west_longitude": -90.42,
        "north_latitude": 48.32,
        "east_longitude": -82.13
    },
    "id": {
        "authority": "EPSG",
        "code": 4268
    }
}

Definition: GeoServer

4268=GEOGCS["NAD27 Michigan (deprecated)",DATUM["NAD27_Michigan",SPHEROID["Clarke 1866 Michigan",6378450.0475489,294.978697164677,AUTHORITY["EPSG","7009"]],AUTHORITY["EPSG","6268"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4268"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"a=6378450.0475489"
	"b=6356826.62148844"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +a=6378450.0475489 +b=6356826.62148844 +no_defs +type=crs">
	<Layer srs="+proj=longlat +a=6378450.0475489 +b=6356826.62148844 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4268, 'EPSG', 4268, '+proj=longlat +a=6378450.0475489 +b=6356826.62148844 +no_defs +type=crs', 'GEOGCS["NAD27 Michigan (deprecated)",DATUM["NAD27_Michigan",SPHEROID["Clarke 1866 Michigan",6378450.0475489,294.978697164677,AUTHORITY["EPSG","7009"]],AUTHORITY["EPSG","6268"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4268"]]');