Heathrow Airport Grid

Attributes

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: The Heathrow Airport Grid (HAG) was originally defined from 5 control points - 3 close to the southern runway and 2 close to the northern runway. Absolute position and orientation is defined with respect to British National Grid through a similarity transformation (code 11388).

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

Covered area powered by MapTiler

WGS84 bounds:
-0.37 51.42
-0.56 51.52

Definition: OGC Well Known Text

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LOCAL_DATUM["Heathrow Airport Grid",32767]

Definition: OGC Well Known Text 2 (2019)

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EDATUM["Heathrow Airport Grid"]

Definition: ESRI Well Known Text

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LOCAL_DATUM["Heathrow Airport Grid",32767]

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "EngineeringDatum",
    "name": "Heathrow Airport Grid",
    "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": 1452
    }
}

Definition: GeoServer

1452-datum=LOCAL_DATUM["Heathrow Airport Grid",32767]

EPSG:1452