{"type": "FeatureCollection", "_meta": {"__meta__": "synthetic", "disclaimer": "Synthetic demo data inspired by real Baltic geography, MMSI/OUI conventions, and infrastructure. Not real observations.", "dataset": "s1-ais-dark-near-cable/area_of_interest", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "s1-aoi", "name": "S1 Area of Interest", "note": "Bounding polygon covering AALLOTAR track and Estlink corridor"}, "geometry": {"type": "Polygon", "coordinates": [[[22.5, 59.65], [28.0, 59.65], [28.0, 60.55], [22.5, 60.55], [22.5, 59.65]]]}}]}