Poolbeg height (ft(Br36))


Unit: British foot (1936)

Geodetic CRS: Poolbeg height (ft(Br36))

Datum: Poolbeg

Data source: EPSG

Information source: Ordnance Survey of Ireland.

Revision date: 2017-10-16

Scope: Topographic mapping.

Remarks: Topographic mapping before 1956 in Northern Ireland and 1970 in the Republic of Ireland. Replaced by Belfast Lough height and Malin Head height (CRS codes 5732 and 5731).

Area of use: Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.

Coordinate system: Vertical CS. Axis: height (H). Orientation: up. UoM: ft(Br36).

Center coordinates
53.41 -7.95

Projected bounds:
51.39 -10.56
55.43 -5.34

WGS84 bounds:
-10.56 51.39
-5.34 55.43

Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.
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Definition: Well Known Text (WKT)

VERT_CS["Poolbeg height (ft(Br36))",
    UNIT["British foot (1936)",0.3048007491],
    AXIS["Gravity-related height",UP],

Definition: ESRI WKT

VERTCS["Poolbeg",VDATUM["Poolbeg"],PARAMETER["Vertical_Shift",0.0],PARAMETER["Direction",1.0],UNIT["British foot (1936)",0.3048007491]]

Definition: PROJ.4

+vto_meter=0.3048007491 +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:5754","+vto_meter=0.3048007491 +no_defs +type=crs");

Definition: JSON

    "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json",
    "type": "VerticalCRS",
    "name": "Poolbeg height (ft(Br36))",
    "datum": {
        "type": "VerticalReferenceFrame",
        "name": "Poolbeg"
    "coordinate_system": {
        "subtype": "vertical",
        "axis": [
                "name": "Gravity-related height",
                "abbreviation": "H",
                "direction": "up",
                "unit": {
                    "type": "LinearUnit",
                    "name": "British foot (1936)",
                    "conversion_factor": 0.3048007491
    "scope": "Topographic mapping.",
    "area": "Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.",
    "bbox": {
        "south_latitude": 51.39,
        "west_longitude": -10.56,
        "north_latitude": 55.43,
        "east_longitude": -5.34
    "id": {
        "authority": "EPSG",
        "code": 5754

Definition: GeoServer

5754=VERT_CS["Poolbeg height (ft(Br36))",VERT_DATUM["Poolbeg",2005],UNIT["British foot (1936)",0.3048007491],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5754"]]

Definition: MapServer - MAPfile


Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+vto_meter=0.3048007491 +no_defs +type=crs">
	<Layer srs="+vto_meter=0.3048007491 +no_defs +type=crs">

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 5754, 'EPSG', 5754, '+vto_meter=0.3048007491 +no_defs +type=crs', 'VERT_CS["Poolbeg height (ft(Br36))",VERT_DATUM["Poolbeg",2005],UNIT["British foot (1936)",0.3048007491],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5754"]]');

Definition: OGC WKT

VERT_CS["Poolbeg height (ft(Br36))",VERT_DATUM["Poolbeg",2005],UNIT["British foot (1936)",0.3048007491],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5754"]]

Definition: OGC WKT 2 (2019)

VERTCRS["Poolbeg height (ft(Br36))",VDATUM["Poolbeg"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["British foot (1936)",0.3048007491]],USAGE[SCOPE["Topographic mapping."],AREA["Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore."],BBOX[51.39,-10.56,55.43,-5.34]],ID["EPSG",5754]]