{"geometry":{"type":"MultiPolygon","coordinates":[[[[-1.406092,51.393517],[-1.405917,51.393704],[-1.40591,51.393726],[-1.405828,51.394093],[-1.405827,51.394446],[-1.406123,51.394428],[-1.406122,51.394066],[-1.406175,51.393817],[-1.406198,51.393771],[-1.406375,51.3936],[-1.406148,51.393519],[-1.406113,51.393494],[-1.406092,51.393517]]]]},"type":"Feature","properties":{"entry-date":"2026-04-23","start-date":"","end-date":"","entity":14502230,"name":"Hamstead Marshall Pit SSSI","dataset":"site-of-special-scientific-interest","typology":"geography","reference":"1003145","prefix":"site-of-special-scientific-interest","organisation-entity":"501910","quality":"authoritative"}}