EPSG:9303

HS2-VRF height

Attributes

Unit: metre

Geodetic CRS: HS2-VRF height

Datum: HS2 Vertical Reference Frame

Data source: EPSG

Information source: HS2 Limited.

Revision date: 2023-01-12

Scope: Engineering survey for HS2 project phases 1 and 2a.

Remarks: HS2-VRF height is equivalent to ODN height as historically realized through OSNet v2001 and OSGM02. After the ODN realization was updated to be through OSNet v2009 and OSGM15, HS2-VRF height was introduced for backward consistency.

Area of use: United Kingdom (UK) - HS2 phases 1 and 2a railway corridor from London to Birmingham, Lichfield and Crewe.

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

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SimpleMap

Center coordinates
52.38 -1.38

Projected bounds:
51.45 -2.75
53.3 0.0

WGS84 bounds:
-2.75 51.45
0.0 53.3

United Kingdom (UK) - HS2 phases 1 and 2a railway corridor from London to Birmingham, Lichfield and Crewe.
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Definition: OGC Well Known Text

VERT_CS["HS2-VRF height",
    VERT_DATUM["HS2 Vertical Reference Frame",2005,
        AUTHORITY["EPSG","1265"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","9303"]]

Definition: OGC Well Known Text 2 (2019)

VERTCRS["HS2-VRF height",
    VDATUM["HS2 Vertical Reference Frame"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey for HS2 project phases 1 and 2a."],
        AREA["United Kingdom (UK) - HS2 phases 1 and 2a railway corridor from London to Birmingham, Lichfield and Crewe."],
        BBOX[51.45,-2.75,53.3,0]],
    ID["EPSG",9303]]

Definition: ESRI Well Known Text

VERTCS["HS2-VRF_height",
    VDATUM["HS2_Vertical_Reference_Frame"],
    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:9303","+vunits=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "VerticalCRS",
    "name": "HS2-VRF height",
    "datum": {
        "type": "VerticalReferenceFrame",
        "name": "HS2 Vertical Reference Frame"
    },
    "coordinate_system": {
        "subtype": "vertical",
        "axis": [
            {
                "name": "Gravity-related height",
                "abbreviation": "H",
                "direction": "up",
                "unit": "metre"
            }
        ]
    },
    "scope": "Engineering survey for HS2 project phases 1 and 2a.",
    "area": "United Kingdom (UK) - HS2 phases 1 and 2a railway corridor from London to Birmingham, Lichfield and Crewe.",
    "bbox": {
        "south_latitude": 51.45,
        "west_longitude": -2.75,
        "north_latitude": 53.3,
        "east_longitude": 0
    },
    "id": {
        "authority": "EPSG",
        "code": 9303
    }
}

Definition: GeoServer

9303=VERT_CS["HS2-VRF height",VERT_DATUM["HS2 Vertical Reference Frame",2005,AUTHORITY["EPSG","1265"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9303"]]

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 ( 9303, 'EPSG', 9303, '+vunits=m +no_defs +type=crs', 'VERT_CS["HS2-VRF height",VERT_DATUM["HS2 Vertical Reference Frame",2005,AUTHORITY["EPSG","1265"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","9303"]]');