EPSG:4122

ATS77

Available transformations
to EPSG:8240

Selected transformation

Method: NTv2

Grid Files: NS778301.gsb

Remarks: Can be taken as an approximate transformation ATS77 to WGS 84 - see code 1851. Replaced by ATS77 to NAD83(CSRS)v6 (4) (transformation code 9106).

Information source: Nova Scotia Geomatics Centre - Contact aflemmin@linux1.nsgc.gov.ns.ca or telephone 902-667-6409

Revision date: 2020-01-16

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
-63.0 45.24

WGS84 bounds:
-66.28 43.41
-59.73 47.08

Canada - Nova Scotia onshore.
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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["NAD83(CSRS)v3",
            DATUM["North American Datum of 1983 (CSRS) version 3",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    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["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]]],
    ABRIDGEDTRANSFORMATION["ATS77 to NAD83(CSRS)v3 (3)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","NS778301.gsb"],
        USAGE[
            SCOPE["Transformation of coordinates at 1m to 2m level of accuracy."],
            AREA["Canada - Nova Scotia onshore."],
            BBOX[43.41,-66.28,47.08,-59.73]],
        ID["EPSG",9235],
        REMARK["Can be taken as an approximate transformation ATS77 to WGS 84 - see code 1851. Replaced by ATS77 to NAD83(CSRS)v6 (4) (transformation code 9106)."]]]

Definition: PROJ.4

+proj=longlat +a=6378135 +rf=298.257 +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:4122","+proj=longlat +a=6378135 +rf=298.257 +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": "NAD83(CSRS)v3",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "North American Datum of 1983 (CSRS) version 3",
            "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
        }
    },
    "transformation": {
        "name": "ATS77 to NAD83(CSRS)v3 (3)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "NS778301.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 9235
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"a=6378135"
	"rf=298.257"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +a=6378135 +rf=298.257 +no_defs +type=crs">
	<Layer srs="+proj=longlat +a=6378135 +rf=298.257 +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 +no_defs +type=crs', 'None');