{"entry-date":"2026-03-28","start-date":"","end-date":"","entity":42215174,"name":"Monument at NW end of General Roy's survey base","dataset":"listed-building-outline","typology":"geography","reference":"LB1119717","prefix":"listed-building-outline","organisation-entity":167,"geometry":"MULTIPOLYGON (((-0.45024 51.479799, -0.45027 51.479831, -0.450306 51.479798, -0.45024 51.479799)))","point":"POINT (-0.450272 51.479809)","quality":"authoritative","notes":"II","description":"Nene Road, Heathrow Airport, Hounslow","listed-building":"1119717"}