WGS 84 / Equi7 North America

Attributes

Unit: metre

Geodetic CRS: WGS 84

Datum: World Geodetic System 1984 ensemble

Data source: EPSG

Information source: "Optimisation of global grids for high-resolution remote sensing data", Bernhard Bauer-Marschallinger, Vienna University of Technology (TU Wien).

Revision date: 2024-01-04

Scope: Continental mapping of raster data.

Remarks: Basis for the Equi7 grid for North America. Designed in 2014 to efficiently handle the archiving, processing, and displaying of high resolution raster data over land while preserving geometric accuracy. Neither conformal nor equal-area.

Area of use: North America including Greenland, the Caribbean and Central America, together with circum-polar area north of 83°40'N. Excluding the circum-polar area, the longitude extent is from 167.65° in west across the 180° meridian to 15.72° in east.

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

Covered area powered by MapTiler

Center coordinates
13500779.76 8838677.99

Projected bounds:
-1674666.59 -13077.01
18215986.72 18224120.85

WGS84 bounds:
-180.0 7.98
180.0 90.0

North America including Greenland, the Caribbean and Central America, together with circum-polar area north of 83°40'N. Excluding the circum-polar area, the longitude extent is from 167.65° in west across the 180° meridian to 15.72° in east.

Definition: OGC Well Known Text

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PROJCS["WGS 84 / Equi7 North America",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4326"]],
    PROJECTION["Azimuthal_Equidistant"],
    PARAMETER["latitude_of_center",52],
    PARAMETER["longitude_of_center",-97.5],
    PARAMETER["false_easting",8264722.177],
    PARAMETER["false_northing",4867518.353],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","27705"]]

Definition: OGC Well Known Text 2 (2019)

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PROJCRS["WGS 84 / Equi7 North America",
    BASEGEOGCRS["WGS 84",
        ENSEMBLE["World Geodetic System 1984 ensemble",
            MEMBER["World Geodetic System 1984 (Transit)"],
            MEMBER["World Geodetic System 1984 (G730)"],
            MEMBER["World Geodetic System 1984 (G873)"],
            MEMBER["World Geodetic System 1984 (G1150)"],
            MEMBER["World Geodetic System 1984 (G1674)"],
            MEMBER["World Geodetic System 1984 (G1762)"],
            MEMBER["World Geodetic System 1984 (G2139)"],
            MEMBER["World Geodetic System 1984 (G2296)"],
            ELLIPSOID["WGS 84",6378137,298.257223563,
                LENGTHUNIT["metre",1]],
            ENSEMBLEACCURACY[2.0]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4326]],
    CONVERSION["Equi7 projection - North America",
        METHOD["Azimuthal Equidistant",
            ID["EPSG",1125]],
        PARAMETER["Latitude of natural origin",52,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-97.5,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["False easting",8264722.177,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",4867518.353,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Continental mapping of raster data."],
        AREA["North America including Greenland, the Caribbean and Central America, together with circum-polar area north of 83°40'N. Excluding the circum-polar area, the longitude extent is from 167.65° in west across the 180° meridian to 15.72° in east."],
        BBOX[7.98,-180,90,180]],
    ID["EPSG",27705]]

Definition: ESRI Well Known Text

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PROJCS["WGS_1984_Equi7_North_America",
    GEOGCS["GCS_WGS_1984",
        DATUM["D_WGS_1984",
            SPHEROID["WGS_1984",6378137.0,298.257223563]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Azimuthal_Equidistant"],
    PARAMETER["False_Easting",8264722.177],
    PARAMETER["False_Northing",4867518.353],
    PARAMETER["Central_Meridian",-97.5],
    PARAMETER["Latitude_Of_Origin",52.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=aeqd +lat_0=52 +lon_0=-97.5 +x_0=8264722.177 +y_0=4867518.353 +datum=WGS84 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:27705","+proj=aeqd +lat_0=52 +lon_0=-97.5 +x_0=8264722.177 +y_0=4867518.353 +datum=WGS84 +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": "WGS 84 / Equi7 North America",
    "base_crs": {
        "name": "WGS 84",
        "datum_ensemble": {
            "name": "World Geodetic System 1984 ensemble",
            "members": [
                {
                    "name": "World Geodetic System 1984 (Transit)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1166
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G730)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1152
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G873)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1153
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1150)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1154
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1674)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1155
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1762)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1156
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G2139)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1309
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G2296)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1383
                    }
                }
            ],
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            },
            "accuracy": "2.0",
            "id": {
                "authority": "EPSG",
                "code": 6326
            }
        },
        "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": 4326
        }
    },
    "conversion": {
        "name": "Equi7 projection - North America",
        "method": {
            "name": "Azimuthal Equidistant",
            "id": {
                "authority": "EPSG",
                "code": 1125
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 52,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -97.5,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "False easting",
                "value": 8264722.177,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 4867518.353,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8807
                }
            }
        ]
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Easting",
                "abbreviation": "E",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "N",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Continental mapping of raster data.",
    "area": "North America including Greenland, the Caribbean and Central America, together with circum-polar area north of 83°40'N. Excluding the circum-polar area, the longitude extent is from 167.65° in west across the 180° meridian to 15.72° in east.",
    "bbox": {
        "south_latitude": 7.98,
        "west_longitude": -180,
        "north_latitude": 90,
        "east_longitude": 180
    },
    "id": {
        "authority": "EPSG",
        "code": 27705
    }
}

Definition: GeoServer

27705=PROJCS["WGS 84 / Equi7 North America",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Azimuthal_Equidistant"],PARAMETER["latitude_of_center",52],PARAMETER["longitude_of_center",-97.5],PARAMETER["false_easting",8264722.177],PARAMETER["false_northing",4867518.353],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","27705"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=aeqd"
	"lat_0=52"
	"lon_0=-97.5"
	"x_0=8264722.177"
	"y_0=4867518.353"
	"datum=WGS84"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=aeqd +lat_0=52 +lon_0=-97.5 +x_0=8264722.177 +y_0=4867518.353 +datum=WGS84 +units=m +no_defs +type=crs">
	<Layer srs="+proj=aeqd +lat_0=52 +lon_0=-97.5 +x_0=8264722.177 +y_0=4867518.353 +datum=WGS84 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 27705, 'EPSG', 27705, '+proj=aeqd +lat_0=52 +lon_0=-97.5 +x_0=8264722.177 +y_0=4867518.353 +datum=WGS84 +units=m +no_defs +type=crs', 'PROJCS["WGS 84 / Equi7 North America",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Azimuthal_Equidistant"],PARAMETER["latitude_of_center",52],PARAMETER["longitude_of_center",-97.5],PARAMETER["false_easting",8264722.177],PARAMETER["false_northing",4867518.353],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","27705"]]');

EPSG:27705