NSIDC EASE-Grid North

Attributes

Unit: metre

Datum: NSIDC International 1924 Authalic Sphere

Ellipsoid: International 1924 Authalic Sphere

Prime meridian: Greenwich

Data source: EPSG

Information source: Brodzik, M. J., & Knowles, K. (2002). EASE-Grid: a versatile set of equal-area projections and grids. http://www.ncgia.ucsb.edu/globalgrids-book/ease_grid

Revision date: 2023-06-29

Scope: Environmental science - used as basis for EASE grid.

Remarks: Used as basis for Equal-Area Scalable Earth Grid (EASE-Grid). See information source for equations to define EASE-Grid overlay. Superseded by WGS 84 / NSIDC EASE-Grid 2.0 North (CRS code 6931), which should be preferred for new data.

Area of use: Northern hemisphere.

Coordinate system: Cartesian 2D CS for north polar azimuthal lonO 0°E. Axes: X,Y. Orientations: X along 90°E, Y along 180°E meridians. UoM: m.

Covered area powered by MapTiler

Center coordinates
0.0 -5131981.97

Projected bounds:
-8918565.42 -9010277.05
8918565.42 9010277.05

WGS84 bounds:
-180.0 0.0
180.0 90.0

Northern hemisphere.

Definition: OGC Well Known Text

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PROJCS["NSIDC EASE-Grid North",
    GEOGCS["NSIDC Authalic Sphere",
        DATUM["NSIDC_International_1924_Authalic_Sphere",
            SPHEROID["International 1924 Authalic Sphere",6371228,0,
                AUTHORITY["EPSG","7057"]],
            AUTHORITY["EPSG","1360"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","10346"]],
    PROJECTION["Lambert_Azimuthal_Equal_Area"],
    PARAMETER["latitude_of_center",90],
    PARAMETER["longitude_of_center",0],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","3408"]]

Definition: OGC Well Known Text 2 (2019)

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PROJCRS["NSIDC EASE-Grid North",
    BASEGEOGCRS["NSIDC Authalic Sphere",
        DATUM["NSIDC International 1924 Authalic Sphere",
            ELLIPSOID["International 1924 Authalic Sphere",6371228,0,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",10346]],
    CONVERSION["US NSIDC Equal Area north projection",
        METHOD["Lambert Azimuthal Equal Area (Spherical)",
            ID["EPSG",1027]],
        PARAMETER["Latitude of natural origin",90,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",0,
            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)",south,
            MERIDIAN[90,
                ANGLEUNIT["degree",0.0174532925199433]],
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["northing (Y)",south,
            MERIDIAN[180,
                ANGLEUNIT["degree",0.0174532925199433]],
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Environmental science - used as basis for EASE grid."],
        AREA["Northern hemisphere."],
        BBOX[0,-180,90,180]],
    ID["EPSG",3408]]

Definition: ESRI Well Known Text

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PROJCS["NSIDC_EASE_Grid_North",
    GEOGCS["NSIDC_Authalic_Sphere",
        DATUM["NSIDC_International_1924_Authalic_Sphere",
            SPHEROID["Sphere_International_1924_Authalic",6371228.0,0.0]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Lambert_Azimuthal_Equal_Area"],
    PARAMETER["latitude_of_center",90.0],
    PARAMETER["longitude_of_center",0.0],
    PARAMETER["false_easting",0.0],
    PARAMETER["false_northing",0.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +R=6371228 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:3408","+proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +R=6371228 +units=m +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "NSIDC EASE-Grid North",
    "base_crs": {
        "name": "NSIDC Authalic Sphere",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "NSIDC International 1924 Authalic Sphere",
            "ellipsoid": {
                "name": "International 1924 Authalic Sphere",
                "radius": 6371228
            }
        },
        "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": 10346
        }
    },
    "conversion": {
        "name": "US NSIDC Equal Area north projection",
        "method": {
            "name": "Lambert Azimuthal Equal Area (Spherical)",
            "id": {
                "authority": "EPSG",
                "code": 1027
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 90,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": 0,
                "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": "south",
                "meridian": {
                    "longitude": 90
                },
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "Y",
                "direction": "south",
                "meridian": {
                    "longitude": 180
                },
                "unit": "metre"
            }
        ]
    },
    "scope": "Environmental science - used as basis for EASE grid.",
    "area": "Northern hemisphere.",
    "bbox": {
        "south_latitude": 0,
        "west_longitude": -180,
        "north_latitude": 90,
        "east_longitude": 180
    },
    "id": {
        "authority": "EPSG",
        "code": 3408
    }
}

Definition: GeoServer

3408=PROJCS["NSIDC EASE-Grid North",GEOGCS["NSIDC Authalic Sphere",DATUM["NSIDC_International_1924_Authalic_Sphere",SPHEROID["International 1924 Authalic Sphere",6371228,0,AUTHORITY["EPSG","7057"]],AUTHORITY["EPSG","1360"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","10346"]],PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["latitude_of_center",90],PARAMETER["longitude_of_center",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","3408"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=laea"
	"lat_0=90"
	"lon_0=0"
	"x_0=0"
	"y_0=0"
	"R=6371228"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +R=6371228 +units=m +no_defs +type=crs">
	<Layer srs="+proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +R=6371228 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 3408, 'EPSG', 3408, '+proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +R=6371228 +units=m +no_defs +type=crs', 'PROJCS["NSIDC EASE-Grid North",GEOGCS["NSIDC Authalic Sphere",DATUM["NSIDC_International_1924_Authalic_Sphere",SPHEROID["International 1924 Authalic Sphere",6371228,0,AUTHORITY["EPSG","7057"]],AUTHORITY["EPSG","1360"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","10346"]],PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["latitude_of_center",90],PARAMETER["longitude_of_center",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","3408"]]');

EPSG:3408