EPSG:7956

SHMG2015 + SHVD2015 height

Attributes

Geodetic CRS: SHMG2015 + SHVD2015 height

Data source: EPSG

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

Revision date: 2022-11-29

Scope: Topographic mapping.

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

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SimpleMap

Center coordinates
208838.86 8233034.18

Projected bounds:
194739.73 8220113.73
222921.92 8245943.45

WGS84 bounds:
-5.85 -16.08
-5.59 -15.85

St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.
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Definition: OGC Well Known Text

COMPD_CS["SHMG2015 + SHVD2015 height",
    PROJCS["SHMG2015",
        GEOGCS["SHGD2015",
            DATUM["St_Helena_Geodetic_Datum_2015",
                SPHEROID["GRS 1980",6378137,298.257222101,
                    AUTHORITY["EPSG","7019"]],
                AUTHORITY["EPSG","1174"]],
            PRIMEM["Greenwich",0,
                AUTHORITY["EPSG","8901"]],
            UNIT["degree",0.0174532925199433,
                AUTHORITY["EPSG","9122"]],
            AUTHORITY["EPSG","7886"]],
        PROJECTION["Transverse_Mercator"],
        PARAMETER["latitude_of_origin",0],
        PARAMETER["central_meridian",-3],
        PARAMETER["scale_factor",0.9996],
        PARAMETER["false_easting",500000],
        PARAMETER["false_northing",10000000],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Easting",EAST],
        AXIS["Northing",NORTH],
        AUTHORITY["EPSG","7887"]],
    VERT_CS["SHVD2015 height",
        VERT_DATUM["St. Helena Vertical Datum 2015",2005,
            AUTHORITY["EPSG","1177"]],
        UNIT["metre",1,
            AUTHORITY["EPSG","9001"]],
        AXIS["Gravity-related height",UP],
        AUTHORITY["EPSG","7890"]],
    AUTHORITY["EPSG","7956"]]

Definition: OGC Well Known Text 2 (2019)

COMPOUNDCRS["SHMG2015 + SHVD2015 height",
    PROJCRS["SHMG2015",
        BASEGEOGCRS["SHGD2015",
            DATUM["St. Helena Geodetic Datum 2015",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            ID["EPSG",7886]],
        CONVERSION["UTM zone 30S",
            METHOD["Transverse Mercator",
                ID["EPSG",9807]],
            PARAMETER["Latitude of natural origin",0,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8801]],
            PARAMETER["Longitude of natural origin",-3,
                ANGLEUNIT["degree",0.0174532925199433],
                ID["EPSG",8802]],
            PARAMETER["Scale factor at natural origin",0.9996,
                SCALEUNIT["unity",1],
                ID["EPSG",8805]],
            PARAMETER["False easting",500000,
                LENGTHUNIT["metre",1],
                ID["EPSG",8806]],
            PARAMETER["False northing",10000000,
                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]]],
    VERTCRS["SHVD2015 height",
        VDATUM["St. Helena Vertical Datum 2015"],
        CS[vertical,1],
            AXIS["gravity-related height (H)",up,
                LENGTHUNIT["metre",1]]],
    USAGE[
        SCOPE["Topographic mapping."],
        AREA["St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore."],
        BBOX[-16.08,-5.85,-15.85,-5.59]],
    ID["EPSG",7956]]

Definition: ESRI Well Known Text

PROJCS["SHMG2015",
    GEOGCS["GCS_SHGD2015",
        DATUM["St_Helena_Geodetic_Datum_2015",
            SPHEROID["GRS_1980",6378137.0,298.257222101]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",500000.0],
    PARAMETER["False_Northing",10000000.0],
    PARAMETER["Central_Meridian",-3.0],
    PARAMETER["Scale_Factor",0.9996],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]],
VERTCS["SHVD2015_height",
    VDATUM["St_Helena_Vertical_Datum_2015"],
    PARAMETER["Vertical_Shift",0.0],
    PARAMETER["Direction",1.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=utm +zone=30 +south +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:7956","+proj=utm +zone=30 +south +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "CompoundCRS",
    "name": "SHMG2015 + SHVD2015 height",
    "components": [
        {
            "type": "ProjectedCRS",
            "name": "SHMG2015",
            "base_crs": {
                "name": "SHGD2015",
                "datum": {
                    "type": "GeodeticReferenceFrame",
                    "name": "St. Helena Geodetic Datum 2015",
                    "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": 7886
                }
            },
            "conversion": {
                "name": "UTM zone 30S",
                "method": {
                    "name": "Transverse Mercator",
                    "id": {
                        "authority": "EPSG",
                        "code": 9807
                    }
                },
                "parameters": [
                    {
                        "name": "Latitude of natural origin",
                        "value": 0,
                        "unit": "degree",
                        "id": {
                            "authority": "EPSG",
                            "code": 8801
                        }
                    },
                    {
                        "name": "Longitude of natural origin",
                        "value": -3,
                        "unit": "degree",
                        "id": {
                            "authority": "EPSG",
                            "code": 8802
                        }
                    },
                    {
                        "name": "Scale factor at natural origin",
                        "value": 0.9996,
                        "unit": "unity",
                        "id": {
                            "authority": "EPSG",
                            "code": 8805
                        }
                    },
                    {
                        "name": "False easting",
                        "value": 500000,
                        "unit": "metre",
                        "id": {
                            "authority": "EPSG",
                            "code": 8806
                        }
                    },
                    {
                        "name": "False northing",
                        "value": 10000000,
                        "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"
                    }
                ]
            }
        },
        {
            "type": "VerticalCRS",
            "name": "SHVD2015 height",
            "datum": {
                "type": "VerticalReferenceFrame",
                "name": "St. Helena Vertical Datum 2015"
            },
            "coordinate_system": {
                "subtype": "vertical",
                "axis": [
                    {
                        "name": "Gravity-related height",
                        "abbreviation": "H",
                        "direction": "up",
                        "unit": "metre"
                    }
                ]
            }
        }
    ],
    "scope": "Topographic mapping.",
    "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": 7956
    }
}

Definition: GeoServer

7956=COMPD_CS["SHMG2015 + SHVD2015 height",PROJCS["SHMG2015",GEOGCS["SHGD2015",DATUM["St_Helena_Geodetic_Datum_2015",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1174"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","7886"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-3],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",10000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","7887"]],VERT_CS["SHVD2015 height",VERT_DATUM["St. Helena Vertical Datum 2015",2005,AUTHORITY["EPSG","1177"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","7890"]],AUTHORITY["EPSG","7956"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=utm"
	"zone=30"
	"south"
	"ellps=GRS80"
	"units=m"
	"vunits=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=utm +zone=30 +south +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs">
	<Layer srs="+proj=utm +zone=30 +south +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 7956, 'EPSG', 7956, '+proj=utm +zone=30 +south +ellps=GRS80 +units=m +vunits=m +no_defs +type=crs', 'COMPD_CS["SHMG2015 + SHVD2015 height",PROJCS["SHMG2015",GEOGCS["SHGD2015",DATUM["St_Helena_Geodetic_Datum_2015",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1174"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","7886"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-3],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",10000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","7887"]],VERT_CS["SHVD2015 height",VERT_DATUM["St. Helena Vertical Datum 2015",2005,AUTHORITY["EPSG","1177"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","7890"]],AUTHORITY["EPSG","7956"]]');