Poolbeg height (m) to Belfast height (1)

Attributes

Data source: EPSG

Information source: "The Irish Grid - A Description of the Co-ordinate Reference System" published by Ordnance Survey of Ireland, Dublin and Ordnance Survey of Northern Ireland, Belfast.

Revision date: 2021-04-20

Scope: Change of height to a different vertical reference surface.

Remarks: Poolbeg vertical reference surface is 2.7m below Belfast surface. Nominal accuracy 0.1m but transformations are subject to localised anomalies.

Method: Vertical Offset

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

Description: (0,)

Covered area powered by MapTiler

United Kingdom (UK) - Northern Ireland (Ulster) - onshore.

Definition: OGC Well Known Text 2 (2019)

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COORDINATEOPERATION["Poolbeg height (m) to Belfast height (1)",
    VERSION["OSI-Ire"],
    SOURCECRS[
        VERTCRS["Poolbeg height (m)",
            VDATUM["Poolbeg"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",7962]]],
    TARGETCRS[
        VERTCRS["Belfast height",
            VDATUM["Belfast Lough"],
            CS[vertical,1],
                AXIS["gravity-related height (H)",up,
                    LENGTHUNIT["metre",1]],
            ID["EPSG",5732]]],
    METHOD["Vertical Offset",
        ID["EPSG",9616]],
    PARAMETER["Vertical Offset",-2.7,
        LENGTHUNIT["metre",1],
        ID["EPSG",8603]],
    OPERATIONACCURACY[0.1],
    USAGE[
        SCOPE["Change of height to a different vertical reference surface."],
        AREA["United Kingdom (UK) - Northern Ireland (Ulster) - onshore."],
        BBOX[53.96,-8.18,55.36,-5.34]],
    ID["EPSG",7966],
    REMARK["Poolbeg vertical reference surface is 2.7m below Belfast surface. Nominal accuracy 0.1m but transformations are subject to localised anomalies."]]

Definition: PROJ.4

+proj=geogoffset +dh=-2.7

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:7966","+proj=geogoffset +dh=-2.7");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json",
    "type": "Transformation",
    "name": "Poolbeg height (m) to Belfast height (1)",
    "source_crs": {
        "type": "VerticalCRS",
        "name": "Poolbeg height (m)",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Poolbeg"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 7962
        }
    },
    "target_crs": {
        "type": "VerticalCRS",
        "name": "Belfast height",
        "datum": {
            "type": "VerticalReferenceFrame",
            "name": "Belfast Lough"
        },
        "coordinate_system": {
            "subtype": "vertical",
            "axis": [
                {
                    "name": "Gravity-related height",
                    "abbreviation": "H",
                    "direction": "up",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 5732
        }
    },
    "method": {
        "name": "Vertical Offset",
        "id": {
            "authority": "EPSG",
            "code": 9616
        }
    },
    "parameters": [
        {
            "name": "Vertical Offset",
            "value": -2.7,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8603
            }
        }
    ],
    "accuracy": "0.1",
    "scope": "Change of height to a different vertical reference surface.",
    "area": "United Kingdom (UK) - Northern Ireland (Ulster) - onshore.",
    "bbox": {
        "south_latitude": 53.96,
        "west_longitude": -8.18,
        "north_latitude": 55.36,
        "east_longitude": -5.34
    },
    "id": {
        "authority": "EPSG",
        "code": 7966
    },
    "remarks": "Poolbeg vertical reference surface is 2.7m below Belfast surface. Nominal accuracy 0.1m but transformations are subject to localised anomalies."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=geogoffset"
	"dh=-2.7"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=geogoffset +dh=-2.7">
	<Layer srs="+proj=geogoffset +dh=-2.7">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 7966, 'EPSG', 7966, '+proj=geogoffset +dh=-2.7', 'None');

EPSG:7966