{"type": "FeatureCollection", "_meta": {"__meta__": "synthetic", "disclaimer": "Synthetic demo data inspired by real Baltic geography, MMSI/OUI conventions, and infrastructure. Not real observations.", "dataset": "s5-drone-launch-from-ship/kilpilahti_recon_polygon", "version": "1.0"}, "features": [{"type": "Feature", "properties": {"featureId": "kilpilahti-recon-polygon", "name": "Kilpilahti recon polygon (S5)", "purpose": "recon_target", "note": "Spec \u00a73 vertices; geographically correct Kilpilahti location"}, "geometry": {"type": "Polygon", "coordinates": [[[25.505, 60.312], [25.564, 60.312], [25.564, 60.295], [25.505, 60.295], [25.505, 60.312]]]}}]}