Heathrow Airport Grid

Attributes

Unit: metre

Data source: EPSG

Information source: Heathrow Airport Limited documents "HAL_10000-XX-DR-XXX-000151_V4p0_P2.xlsx" and "Coordinate Systems - Airport Grid Spatial Project".

Revision date: 2026-03-05

Scope: Engineering survey, topographic mapping.

Remarks: Related to OSGB36 / British National Grid through a similarity transformation (code 11388). For GIS purposes may be approximated by projected CRS OSGB36 / Heathrow Airport GIS Grid 2026 (code 11390).

Area of use: UK - Heathrow airport and surrounding area.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.

Covered area powered by MapTiler

UK - Heathrow airport and surrounding area.

Definition: OGC Well Known Text

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LOCAL_CS["Heathrow Airport Grid",
    LOCAL_DATUM["Heathrow Airport Grid",32767],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","11378"]]

Definition: OGC Well Known Text 2 (2019)

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ENGCRS["Heathrow Airport Grid",
    EDATUM["Heathrow Airport Grid"],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Engineering survey, topographic mapping."],
        AREA["UK - Heathrow airport and surrounding area."],
        BBOX[51.42,-0.56,51.52,-0.37]],
    ID["EPSG",11378]]

Definition: ESRI Well Known Text

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LOCAL_CS["Heathrow Airport Grid",
    LOCAL_DATUM["Heathrow Airport Grid",32767],
    UNIT["Meter",1.0],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH]]

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "EngineeringCRS",
    "name": "Heathrow Airport Grid",
    "datum": {
        "name": "Heathrow Airport Grid"
    },
    "coordinate_system": {
        "subtype": "Cartesian",
        "axis": [
            {
                "name": "Easting",
                "abbreviation": "E",
                "direction": "east",
                "unit": "metre"
            },
            {
                "name": "Northing",
                "abbreviation": "N",
                "direction": "north",
                "unit": "metre"
            }
        ]
    },
    "scope": "Engineering survey, topographic mapping.",
    "area": "UK - Heathrow airport and surrounding area.",
    "bbox": {
        "south_latitude": 51.42,
        "west_longitude": -0.56,
        "north_latitude": 51.52,
        "east_longitude": -0.37
    },
    "id": {
        "authority": "EPSG",
        "code": 11378
    }
}

Definition: GeoServer

11378=LOCAL_CS["Heathrow Airport Grid",LOCAL_DATUM["Heathrow Airport Grid",32767],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","11378"]]

EPSG:11378