{"features":[{"geometry":{"coordinates":[[[-4,46],[8,46],[8,52],[-4,52],[-4,46]]],"type":"Polygon"},"properties":{"confidence":"contextual_not_exact","control_point_status":"not_georeferenced","digitization_status":"schematic_zone_not_trace","end_date":"1918-11-11","exactness":"not_exact_geometry","geometry_status":"schematic_polygon","id":"zone_western_front","name":"Western Front operational zone","precision_policy":"frontline_precision_policy_v1","public_precision_warning":"Context geometry only. Do not read as an exact surveyed front, battle boundary, or territorial control line.","review_status":"seed_record","source":"ap_wwi_seed_registry","start_date":"1914-08-04","summary":"Operational area geometry for atlas-scale spatial context.","theater":"Western Front","type":"operation_zone"},"type":"Feature"}],"type":"FeatureCollection"}