St. Helena Tritan / SHLG(Tritan)

St Helena, Ascension and Tristan da Cunha , accuracy 1.0 m, code 7898 (default) [3]

Selected transformation

Method: Geocentric translations (geog2D domain)

Remarks: Parameter values from Tritan St. Helena to SHGD2015 (1) (tfm code 7897). Assumes Tritan St. Helena and SHGD2015 can be considered the same to within the accuracy of the transformation.

Information source: St. Helena Government, Environment and Natural Resources Directorate (ENRD).

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: St. Helena Tritan

Datum: St. Helena Tritan

Ellipsoid: WGS 84

Prime meridian: Greenwich

Data source: EPSG

Information source: St. Helena Government, Environment and Natural Resources Directorate (ENRD).

Revision date: 2016-11-20

Scope: Engineering survey including Airport and Ruperts Wharf construction.

Remarks: Replaced by SHMG2015 (CRS code 7887) from 2015.

Area of use: St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.

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

Covered area powered by MapTiler

Center coordinates
299126.82 2000712.25

Projected bounds:
285201.81 1987981.88
313051.43 2013437.89

WGS84 bounds:
-5.85 -16.08
-5.59 -15.85

St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.

Definition: OGC Well Known Text

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PROJCS["St. Helena Tritan / SHLG(Tritan)",
    GEOGCS["St. Helena Tritan",
        DATUM["St_Helena_Tritan",
            SPHEROID["WGS 84",6378137,298.257223563],
            TOWGS84[-0.077,0.079,0.086,0,0,0,0]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","7881"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",-15.9666666666667],
    PARAMETER["central_meridian",-5.71666666666667],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",299483.737],
    PARAMETER["false_northing",2000527.879],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","7882"]]

Definition: OGC Well Known Text 2 (2019)

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PROJCRS["St. Helena Tritan / SHLG(Tritan)",
    BASEGEOGCRS["St. Helena Tritan",
        DATUM["St. Helena Tritan",
            ELLIPSOID["WGS 84",6378137,298.257223563,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",7881]],
    CONVERSION["St. Helena Local Grid (Tritan)",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",-15.9666666666667,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-5.71666666666667,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",1,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",299483.737,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",2000527.879,
            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["Engineering survey including Airport and Ruperts Wharf construction."],
        AREA["St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore."],
        BBOX[-16.08,-5.85,-15.85,-5.59]],
    ID["EPSG",7882]]

Definition: ESRI Well Known Text

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PROJCS["St_Helena_Tritan_SHLG(Tritan)",
    GEOGCS["St_Helena_Tritan",
        DATUM["St_Helena_Tritan",
            SPHEROID["WGS_1984",6378137.0,298.257223563]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",299483.737],
    PARAMETER["False_Northing",2000527.879],
    PARAMETER["Central_Meridian",-5.71666666666667],
    PARAMETER["Scale_Factor",1.0],
    PARAMETER["Latitude_Of_Origin",-15.9666666666667],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=-15.9666666666667 +lon_0=-5.71666666666667 +k=1 +x_0=299483.737 +y_0=2000527.879 +ellps=WGS84 +towgs84=-0.077,0.079,0.086,0,0,0,0 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:7882","+proj=tmerc +lat_0=-15.9666666666667 +lon_0=-5.71666666666667 +k=1 +x_0=299483.737 +y_0=2000527.879 +ellps=WGS84 +towgs84=-0.077,0.079,0.086,0,0,0,0 +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": "St. Helena Tritan / SHLG(Tritan)",
    "base_crs": {
        "name": "St. Helena Tritan",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "St. Helena Tritan",
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            }
        },
        "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": 7881
        }
    },
    "conversion": {
        "name": "St. Helena Local Grid (Tritan)",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": -15.9666666666667,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -5.71666666666667,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8802
                }
            },
            {
                "name": "Scale factor at natural origin",
                "value": 1,
                "unit": "unity",
                "id": {
                    "authority": "EPSG",
                    "code": 8805
                }
            },
            {
                "name": "False easting",
                "value": 299483.737,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 2000527.879,
                "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": "Engineering survey including Airport and Ruperts Wharf construction.",
    "area": "St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.",
    "bbox": {
        "south_latitude": -16.08,
        "west_longitude": -5.85,
        "north_latitude": -15.85,
        "east_longitude": -5.59
    },
    "id": {
        "authority": "EPSG",
        "code": 7882
    }
}

Definition: GeoServer

7882=PROJCS["St. Helena Tritan / SHLG(Tritan)",GEOGCS["St. Helena Tritan",DATUM["St_Helena_Tritan",SPHEROID["WGS 84",6378137,298.257223563],TOWGS84[-0.077,0.079,0.086,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","7881"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-15.9666666666667],PARAMETER["central_meridian",-5.71666666666667],PARAMETER["scale_factor",1],PARAMETER["false_easting",299483.737],PARAMETER["false_northing",2000527.879],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","7882"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=-15.9666666666667"
	"lon_0=-5.71666666666667"
	"k=1"
	"x_0=299483.737"
	"y_0=2000527.879"
	"ellps=WGS84"
	"towgs84=-0.077,0.079,0.086,0,0,0,0"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=-15.9666666666667 +lon_0=-5.71666666666667 +k=1 +x_0=299483.737 +y_0=2000527.879 +ellps=WGS84 +towgs84=-0.077,0.079,0.086,0,0,0,0 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=-15.9666666666667 +lon_0=-5.71666666666667 +k=1 +x_0=299483.737 +y_0=2000527.879 +ellps=WGS84 +towgs84=-0.077,0.079,0.086,0,0,0,0 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 7882, 'EPSG', 7882, '+proj=tmerc +lat_0=-15.9666666666667 +lon_0=-5.71666666666667 +k=1 +x_0=299483.737 +y_0=2000527.879 +ellps=WGS84 +towgs84=-0.077,0.079,0.086,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["St. Helena Tritan / SHLG(Tritan)",GEOGCS["St. Helena Tritan",DATUM["St_Helena_Tritan",SPHEROID["WGS 84",6378137,298.257223563],TOWGS84[-0.077,0.079,0.086,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","7881"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-15.9666666666667],PARAMETER["central_meridian",-5.71666666666667],PARAMETER["scale_factor",1],PARAMETER["false_easting",299483.737],PARAMETER["false_northing",2000527.879],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","7882"]]');

EPSG:7882