EPSG:9311

NAD27 / US National Atlas Equal Area

Available transformations
to EPSG:8240
EPSG:8240 - NAD83(CSRS)v3

Selected transformation

Name: NAD27 to NAD83(CSRS)v3 (2)

Method: NTv2

Grid Files: SK27-98.gsb

Remarks: Can be taken as an approximate transformation NAD27 to WGS 84 - see code 1703.

Information source: Dir Geodetic Surveys; SaskGeomatics Div.; Saskatchewan Property Management Company.

Revision date: 2020-01-16

Attributes

Unit: metre

Geodetic CRS: NAD27

Datum: North American Datum 1927

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Information source: United States Geological Survey, Western Geographic Science Center

Revision date: 2020-03-26

Scope: Statistical analysis.

Remarks: Uses spherical projection formulas. USGS documentation describes sphere as derived from GRS80/WGS 84 ellipsoid but that actually used is Clarke 1866. For 1:1million and smaller scale maps there is no significant difference.

Area of use: United States (USA) - onshore and offshore.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.

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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        PROJCRS["NAD27 / US National Atlas Equal Area",
            BASEGEOGCRS["NAD27",
                DATUM["North American Datum 1927",
                    ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4267]],
            CONVERSION["US National Atlas Equal Area",
                METHOD["Lambert Azimuthal Equal Area (Spherical)",
                    ID["EPSG",1027]],
                PARAMETER["Latitude of natural origin",45,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",-100,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8802]],
                PARAMETER["False easting",0,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8806]],
                PARAMETER["False northing",0,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8807]]],
            CS[Cartesian,2],
                AXIS["easting (X)",east,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["northing (Y)",north,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Statistical analysis."],
                AREA["United States (USA) - onshore and offshore."],
                BBOX[15.56,167.65,74.71,-65.69]],
            ID["EPSG",9311]]],
    TARGETCRS[
        GEOGCRS["NAD83(CSRS)v3",
            DATUM["North American Datum of 1983 (CSRS) version 3",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]],
                ANCHOREPOCH[1997]],
            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["Horizontal component of 3D system."],
                AREA["Canada - onshore and offshore - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon."],
                BBOX[38.21,-141.01,86.46,-40.73]],
            ID["EPSG",8240],
            REMARK["Adopted by the Canadian federal government from 1999-01-01 and by the provincial governments of Alberta, British Columbia, Manitoba, Newfoundland and Labrador, Nova Scotia, Ontario and Saskatchewan. Replaces NAD83(CSRS)v2. Replaced by NAD83(CSRS)v4."]]],
    ABRIDGEDTRANSFORMATION["NAD27 to NAD83(CSRS)v3 (2)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","SK27-98.gsb"],
        USAGE[
            SCOPE["Transformation of coordinates at 1m to 2m level of accuracy."],
            AREA["Canada - Saskatchewan."],
            BBOX[49,-110,60.01,-101.34]],
        ID["EPSG",9242],
        REMARK["Can be taken as an approximate transformation NAD27 to WGS 84 - see code 1703."]]]

Definition: PROJ.4

+proj=laea +R_A +lat_0=45 +lon_0=-100 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:9311","+proj=laea +R_A +lat_0=45 +lon_0=-100 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "NAD27 / US National Atlas Equal Area",
        "base_crs": {
            "type": "GeographicCRS",
            "name": "NAD27",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "North American Datum 1927",
                "ellipsoid": {
                    "name": "Clarke 1866",
                    "semi_major_axis": 6378206.4,
                    "semi_minor_axis": 6356583.8
                }
            },
            "coordinate_system": {
                "subtype": "ellipsoidal",
                "axis": [
                    {
                        "name": "Geodetic latitude",
                        "abbreviation": "Lat",
                        "direction": "north",
                        "unit": "degree"
                    },
                    {
                        "name": "Geodetic longitude",
                        "abbreviation": "Lon",
                        "direction": "east",
                        "unit": "degree"
                    }
                ]
            },
            "id": {
                "authority": "EPSG",
                "code": 4267
            },
            "remarks": "Note: this CRS includes longitudes which are POSITIVE EAST. Replaced by NAD27(76) (code 4608) in Ontario, CGQ77 (code 4609) in Quebec, Mexican Datum of 1993 (code 4483) in Mexico, NAD83 (code 4269) in Canada (excl. Ontario & Quebec) & USA."
        },
        "conversion": {
            "name": "US National Atlas Equal Area",
            "method": {
                "name": "Lambert Azimuthal Equal Area (Spherical)",
                "id": {
                    "authority": "EPSG",
                    "code": 1027
                }
            },
            "parameters": [
                {
                    "name": "Latitude of natural origin",
                    "value": 45,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8801
                    }
                },
                {
                    "name": "Longitude of natural origin",
                    "value": -100,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8802
                    }
                },
                {
                    "name": "False easting",
                    "value": 0,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8806
                    }
                },
                {
                    "name": "False northing",
                    "value": 0,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8807
                    }
                }
            ]
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Easting",
                    "abbreviation": "X",
                    "direction": "east",
                    "unit": "metre"
                },
                {
                    "name": "Northing",
                    "abbreviation": "Y",
                    "direction": "north",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 9311
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "NAD83(CSRS)v3",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "North American Datum of 1983 (CSRS) version 3",
            "anchor_epoch": 1997,
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 8240
        },
        "remarks": "Adopted by the Canadian federal government from 1999-01-01 and by the provincial governments of Alberta, British Columbia, Manitoba, Newfoundland and Labrador, Nova Scotia, Ontario and Saskatchewan. Replaces NAD83(CSRS)v2. Replaced by NAD83(CSRS)v4."
    },
    "transformation": {
        "name": "NAD27 to NAD83(CSRS)v3 (2)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "SK27-98.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 9242
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=laea"
	"R_A"
	"lat_0=45"
	"lon_0=-100"
	"x_0=0"
	"y_0=0"
	"datum=NAD27"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=laea +R_A +lat_0=45 +lon_0=-100 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs">
	<Layer srs="+proj=laea +R_A +lat_0=45 +lon_0=-100 +x_0=0 +y_0=0 +datum=NAD27 +units=m +no_defs +type=crs">
	</Layer>
</Map>