{
  "sample_id": "sample_000039",
  "rgb_tif_path": "source_assets/routing/000039/input/rgb.tif",
  "rgb_preview_path": "source_assets/routing/000039/input/rgb_preview.png",
  "source": "Sentinel-2 L2A",
  "bands": [
    "B04",
    "B03",
    "B02"
  ],
  "acquisition_dates": [
    "2026-02-26T10:59:39.024000Z",
    "2026-02-03T10:52:11.024000Z",
    "2026-02-03T10:51:39.025000Z",
    "2026-03-03T10:59:51.025000Z",
    "2026-03-03T10:59:51.025000Z"
  ],
  "mosaic_item_ids": [
    "S2B_MSIL2A_20260226T105939_R094_T31TCL_20260226T145626",
    "S2A_MSIL2A_20260203T105211_R051_T30TYQ_20260203T155308",
    "S2B_MSIL2A_20260203T105139_R051_T30TYQ_20260203T131950",
    "S2C_MSIL2A_20260303T105951_R094_T31TCL_20260303T143613",
    "S2C_MSIL2A_20260303T105951_R094_T30TYR_20260303T143613"
  ],
  "cloud_covers": [
    0.000185,
    4.8956,
    5.10722,
    6.839662,
    7.924171
  ],
  "s2_search_label": "+/-30d_cloud10",
  "s2_valid_fraction": 1.0,
  "rgb_nonblack_fraction": 0.9819,
  "gsd_m": 10,
  "chip_size_px": [
    512,
    512
  ],
  "crs": "EPSG:32631",
  "bounds_projected": [
    297912.7983943486,
    4994477.581388118,
    303032.7983943486,
    4999597.581388118
  ],
  "bounds_wgs84": [
    0.43052562824001606,
    45.07489848302956,
    0.49757501538941284,
    45.12238678613699
  ],
  "center_wgs84": [
    45.09864673490674,
    0.46406335819255323
  ],
  "activation_code": "EMSR866",
  "event_name": "Flood in New Aquitaine, France",
  "event_date": "2026-02-12",
  "countries": [
    {
      "name": "France"
    }
  ],
  "product_type": "DEL",
  "product_id": "2441",
  "product_key": "EMSR866_AOI04_DEL_2441",
  "aoi": {
    "name": "Perigueux",
    "number": 4
  },
  "start_point": {
    "lat": 45.10017870000001,
    "lon": 0.4582824999999991,
    "node": 13254221740
  },
  "selected_shelter": {
    "name": "Collège Henri Bretin",
    "confidence": "low_fallback_public_facility",
    "candidate_id": "C007"
  },
  "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"
  }
}