{"type": "FeatureCollection", "_meta": {"__meta__": "synthetic", "disclaimer": "Synthetic demo data inspired by real Baltic geography, MMSI/OUI conventions, and infrastructure. Not real observations.", "dataset": "s9-porvoo-drone/aoi", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "s9-aoi", "name": "S9 Area of Interest", "note": "MV VOLKOV approach corridor + Porvoo drone flight path to old town"}, "geometry": {"type": "Polygon", "coordinates": [[[25.4, 59.55], [27.35, 59.55], [27.35, 60.45], [25.4, 60.45], [25.4, 59.55]]]}}]}