EPSG:9451

BI height

Attributes

Unit: metre

Geodetic CRS: BI height

Datum: British Isles height ensemble

Data source: EPSG

Information source: Ordnance Survey Limited.

Revision date: 2022-01-24

Scope: Spatial referencing.

Area of use: United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland) and Northern Ireland. Ireland onshore. Isle of Man onshore.

Coordinate system: Vertical CS. Axis: height (H). Orientation: up. UoM: m.

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SimpleMap
United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland) and Northern Ireland. Ireland onshore. Isle of Man onshore.
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Definition: OGC Well Known Text

VERT_CS["BI height",
    VERT_DATUM["British Isles height ensemble",2005,
        AUTHORITY["EPSG","1288"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","9451"]]

Definition: OGC Well Known Text 2 (2019)

VERTCRS["BI height",
    ENSEMBLE["British Isles height ensemble",
        MEMBER["Malin Head"],
        MEMBER["Belfast Lough"],
        MEMBER["Ordnance Datum Newlyn"],
        MEMBER["Ordnance Datum Newlyn (Offshore)"],
        MEMBER["Ordnance Datum Newlyn (Orkney Isles)"],
        MEMBER["Lerwick"],
        MEMBER["Stornoway"],
        MEMBER["Douglas"],
        MEMBER["St. Marys"],
        ENSEMBLEACCURACY[0.4]],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Spatial referencing."],
        AREA["United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland) and Northern Ireland. Ireland onshore. Isle of Man onshore."],
        BBOX[49.75,-10.85,61.01,2.01]],
    ID["EPSG",9451]]

Definition: ESRI Well Known Text

VERTCS["BI_height",
    VDATUM["British_Isles_height_ensemble"],
    PARAMETER["Vertical_Shift",0.0],
    PARAMETER["Direction",1.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+vunits=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:9451","+vunits=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "VerticalCRS",
    "name": "BI height",
    "datum_ensemble": {
        "name": "British Isles height ensemble",
        "members": [
            {
                "name": "Malin Head",
                "id": {
                    "authority": "EPSG",
                    "code": 5130
                }
            },
            {
                "name": "Belfast Lough",
                "id": {
                    "authority": "EPSG",
                    "code": 5131
                }
            },
            {
                "name": "Ordnance Datum Newlyn",
                "id": {
                    "authority": "EPSG",
                    "code": 5101
                }
            },
            {
                "name": "Ordnance Datum Newlyn (Offshore)",
                "id": {
                    "authority": "EPSG",
                    "code": 1164
                }
            },
            {
                "name": "Ordnance Datum Newlyn (Orkney Isles)",
                "id": {
                    "authority": "EPSG",
                    "code": 5138
                }
            },
            {
                "name": "Lerwick",
                "id": {
                    "authority": "EPSG",
                    "code": 5140
                }
            },
            {
                "name": "Stornoway",
                "id": {
                    "authority": "EPSG",
                    "code": 5144
                }
            },
            {
                "name": "Douglas",
                "id": {
                    "authority": "EPSG",
                    "code": 5148
                }
            },
            {
                "name": "St. Marys",
                "id": {
                    "authority": "EPSG",
                    "code": 5147
                }
            }
        ],
        "accuracy": "0.4",
        "id": {
            "authority": "EPSG",
            "code": 1288
        }
    },
    "coordinate_system": {
        "subtype": "vertical",
        "axis": [
            {
                "name": "Gravity-related height",
                "abbreviation": "H",
                "direction": "up",
                "unit": "metre"
            }
        ]
    },
    "scope": "Spatial referencing.",
    "area": "United Kingdom (UK) - offshore to boundary of UKCS within 49°45'N to 61°N and 9°W to 2°E; onshore Great Britain (England, Wales and Scotland) and Northern Ireland. Ireland onshore. Isle of Man onshore.",
    "bbox": {
        "south_latitude": 49.75,
        "west_longitude": -10.85,
        "north_latitude": 61.01,
        "east_longitude": 2.01
    },
    "id": {
        "authority": "EPSG",
        "code": 9451
    }
}

Definition: GeoServer

9451=VERT_CS["BI height",VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9451"]]

Definition: MapServer - MAPfile

PROJECTION
	"vunits=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+vunits=m +no_defs +type=crs">
	<Layer srs="+vunits=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9451, 'EPSG', 9451, '+vunits=m +no_defs +type=crs', 'VERT_CS["BI height",VERT_DATUM["British Isles height ensemble",2005,AUTHORITY["EPSG","1288"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9451"]]');