{
  "sample_id": "sample_000021",
  "rgb_tif_path": "source_assets/routing/000021/input/rgb.tif",
  "rgb_preview_path": "source_assets/routing/000021/input/rgb_preview.png",
  "source": "Sentinel-2 L2A",
  "bands": [
    "B04",
    "B03",
    "B02"
  ],
  "acquisition_dates": [
    "2026-03-10T09:08:11.025000Z",
    "2026-03-07T08:58:31.024000Z",
    "2026-02-23T09:08:59.024000Z"
  ],
  "mosaic_item_ids": [
    "S2C_MSIL2A_20260310T090811_R050_T35TMF_20260310T131711",
    "S2C_MSIL2A_20260307T085831_R007_T35TMF_20260307T120620",
    "S2B_MSIL2A_20260223T090859_R050_T35TMF_20260223T130354"
  ],
  "cloud_covers": [
    0.433636,
    1.888052,
    3.19632
  ],
  "s2_search_label": "+/-30d_cloud10",
  "s2_valid_fraction": 1.0,
  "rgb_nonblack_fraction": 0.9729,
  "gsd_m": 10,
  "chip_size_px": [
    512,
    512
  ],
  "crs": "EPSG:32635",
  "bounds_projected": [
    438473.50049013074,
    4545129.054866359,
    443593.50049013074,
    4550249.054866359
  ],
  "bounds_wgs84": [
    26.26730694397676,
    41.055074206174254,
    26.328744040287322,
    41.10156357368993
  ],
  "center_wgs84": [
    41.078322815965166,
    26.298036140269563
  ],
  "activation_code": "EMSR868",
  "event_name": "Flood in Evros River basin, Greece",
  "event_date": "2026-02-19",
  "countries": [
    {
      "name": "Greece"
    }
  ],
  "product_type": "DEL",
  "product_id": "2496",
  "product_key": "EMSR868_AOI02_DEL_2496",
  "aoi": {
    "name": "Feres",
    "number": 2
  },
  "start_point": {
    "lat": 41.0723706,
    "lon": 26.2962262,
    "node": 7461651339
  },
  "selected_shelter": {
    "name": "Αγία Παρασκευή",
    "confidence": "low_fallback_public_facility",
    "candidate_id": "C002"
  },
  "network_type": "walk",
  "osm_aoi_buffer_m": 3000,
  "road_buffer_m": 8,
  "flood_risk_buffer_m": 120,
  "walking_speed_kmh": 4.5,
  "k_routes_per_type": 3,
  "routing_ranking_contract": {
    "version": "packaged_composite_edge_cost_v2",
    "risk_score": "length-weighted mean edge flood_risk",
    "fastest_edge_cost": "travel_time_min",
    "safest_edge_cost": "travel_time_min * (1 + 10 * flood_risk)",
    "balanced_edge_cost": "travel_time_min * (1 + 4 * flood_risk)",
    "route_objective": "sum the corresponding edge cost",
    "eligibility": "blocked_edges == 0",
    "tie_break": [
      "eta_min",
      "distance_m",
      "route_id"
    ],
    "graph_search_performed_at_runtime": false,
    "runtime_validation": "recompute metrics and objective from declared candidate geometry and flood-risk road edges"
  }
}