EPSG:4122

ATS77

Selected transformation

Method: NTv2

Grid Files: PE7783V2.gsb

Remarks: Parameter file is from ATS77 to NAD83(CSRS)v2 (2) (code 9236) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation.

Information source: OGP

Revision date: 2021-09-23

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: ATS77

Datum: Average Terrestrial System 1977

Ellipsoid: Average Terrestrial System 1977

Prime meridian: Greenwich

Data source: EPSG

Information source: New Brunswick Geographic Information Corporation land and water information standards manual.

Revision date: 2019-09-17

Scope: Geodesy.

Remarks: In use from 1979. To be phased out in late 1990's.

Area of use: Canada - New Brunswick; Nova Scotia; Prince Edward Island.

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

Center coordinates
-63.2 46.49

WGS84 bounds:
-64.49 45.9
-61.9 47.09

Canada - Prince Edward Island.
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Definition: OGC Well Known Text

GEOGCS["ATS77",
    DATUM["Average_Terrestrial_System_1977",
        SPHEROID["Average Terrestrial System 1977",6378135,298.257],
        EXTENSION["PROJ4_GRIDS","PE7783V2.gsb"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4122"]]

Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        GEOGCRS["ATS77",
            DATUM["Average Terrestrial System 1977",
                ELLIPSOID["Average Terrestrial System 1977",6378135,298.257,
                    LENGTHUNIT["metre",1]]],
            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["Canada - New Brunswick; Nova Scotia; Prince Edward Island."],
                BBOX[43.41,-69.05,48.07,-59.73]],
            ID["EPSG",4122]]],
    TARGETCRS[
        GEOGCRS["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)"],
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]],
                ENSEMBLEACCURACY[2.0]],
            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["World."],
                BBOX[-90,-180,90,180]],
            ID["EPSG",4326]]],
    ABRIDGEDTRANSFORMATION["ATS77 to WGS 84 (2)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","PE7783V2.gsb"],
        USAGE[
            SCOPE["(null/copy) Approximation for medium and low accuracy applications assuming equality between plate-fixed static and earth-fixed dynamic CRSs, ignoring static/dynamic CRS differences."],
            AREA["Canada - Prince Edward Island."],
            BBOX[45.9,-64.49,47.09,-61.9]],
        ID["EPSG",1689],
        REMARK["Parameter file is from ATS77 to NAD83(CSRS)v2 (2) (code 9236) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation."]]]

Definition: ESRI Well Known Text

GEOGCS["GCS_ATS_1977",
    DATUM["D_ATS_1977",
        SPHEROID["ATS_1977",6378135.0,298.257],
        EXTENSION["PROJ4_GRIDS","PE7783V2.gsb"]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +a=6378135 +rf=298.257 +nadgrids=PE7783V2.gsb +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:4122","+proj=longlat +a=6378135 +rf=298.257 +nadgrids=PE7783V2.gsb +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "ATS77",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Average Terrestrial System 1977",
            "ellipsoid": {
                "name": "Average Terrestrial System 1977",
                "semi_major_axis": 6378135,
                "inverse_flattening": 298.257
            }
        },
        "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": 4122
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "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
                    }
                }
            ],
            "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
        }
    },
    "transformation": {
        "name": "ATS77 to WGS 84 (2)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "PE7783V2.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 1689
        }
    }
}

Definition: GeoServer

4122=GEOGCS["ATS77",DATUM["Average_Terrestrial_System_1977",SPHEROID["Average Terrestrial System 1977",6378135,298.257],EXTENSION["PROJ4_GRIDS","PE7783V2.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4122"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"a=6378135"
	"rf=298.257"
	"nadgrids=PE7783V2.gsb"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +a=6378135 +rf=298.257 +nadgrids=PE7783V2.gsb +no_defs +type=crs">
	<Layer srs="+proj=longlat +a=6378135 +rf=298.257 +nadgrids=PE7783V2.gsb +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4122, 'EPSG', 4122, '+proj=longlat +a=6378135 +rf=298.257 +nadgrids=PE7783V2.gsb +no_defs +type=crs', 'GEOGCS["ATS77",DATUM["Average_Terrestrial_System_1977",SPHEROID["Average Terrestrial System 1977",6378135,298.257],EXTENSION["PROJ4_GRIDS","PE7783V2.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4122"]]');