{"$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}}