{
  "site_name": "Litchfield-Hillsboro LF (IL)",
  "landfill_id": 1877,
  "lat": 39.17,
  "lon": -89.615,
  "source": "mass_run",
  "measurement": {
    "hard_fail": true,
    "hard_fail_reason": "sin puntos de suelo reales en una de las dos epocas dentro del area de interes - epochs cannot be aligned reliably",
    "evidence_refs": [
      "epoch_a: kind=ept label='ARRA-NRCS_Illinois_2010' n_ground_points=0 runtime_s=3.6",
      "epoch_b: kind=ept label='USGS_LPC_IL_GrnMacMont_2017_LAS_2018' n_ground_points=3025196 runtime_s=19.2"
    ],
    "meta": {
      "epoch_a": {
        "runtime_s": 3.580506511000067,
        "n_points": 0,
        "text_bytes": 12
      },
      "epoch_b": {
        "runtime_s": 19.176116409000088,
        "n_points": 3025196,
        "text_bytes": 93781088
      }
    },
    "landfill_id": 1877,
    "name": "Litchfield-Hillsboro LF",
    "state": "IL",
    "lat": 39.17,
    "lon": -89.615,
    "site_note": "poligono sintetico (buffer 200x200m sobre coordenada LMOP real), NO el parcel legal exacto",
    "datum_note": "UTM WGS84, no NAD83(2011) especifico por estado - ver docstring de lmop_mass_runner.py"
  },
  "verdict": {
    "verdict": "INCONCLUSIVE_NO_DATA",
    "confidence": null,
    "declared_state": "Epoch A (unknown date) - reference/baseline surface",
    "observed_state": "Epoch B (unknown date) - current surface",
    "delta": null,
    "sensor_agreement": {
      "status": "not_applicable_single_sensor",
      "note": "physical_change compares two epochs of the same sensor modality (LiDAR vs. LiDAR) - there is no second independent sensor to cross-check against today, unlike china_industrial_reality's multi-signal (NDVI/NDBI/SAR) discipline. The stable_control_offset_m/stable_control_sigma_m fields are a real internal consistency check (calibration against known-stable ground), not a second sensor."
    },
    "evidence": [
      {
        "source": "epoch_a: kind=ept label='ARRA-NRCS_Illinois_2010' n_ground_points=0 runtime_s=3.6",
        "nominal_date": null,
        "dates_independently_verified": null,
        "n_ground_points": 0,
        "hash": null,
        "hash_note": "No cryptographic hash of the source point cloud is computed today - real gap, not hidden.",
        "method_version": "measure_physical_change (unmodified core function across all 4 validated sites)",
        "uncertainty_m3": null,
        "rights": "CC-BY 4.0"
      },
      {
        "source": "epoch_b: kind=ept label='USGS_LPC_IL_GrnMacMont_2017_LAS_2018' n_ground_points=3025196 runtime_s=19.2",
        "nominal_date": null,
        "dates_independently_verified": null,
        "n_ground_points": 3025196,
        "hash": null,
        "hash_note": "No cryptographic hash of the source point cloud is computed today - real gap, not hidden.",
        "method_version": "measure_physical_change (unmodified core function across all 4 validated sites)",
        "uncertainty_m3": null,
        "rights": "CC-BY 4.0"
      }
    ],
    "recommended_next_action": "None available automatically today - the L0-L3 sensor escalation ladder (higher-resolution commercial imagery as a last resort) is not built yet. Manually: request a re-measurement with a customer-supplied real polygon via the request-access path, or try a different point if this one has no usable public LiDAR coverage.",
    "raw_measurement": {
      "hard_fail": true,
      "hard_fail_reason": "sin puntos de suelo reales en una de las dos epocas dentro del area de interes - epochs cannot be aligned reliably",
      "evidence_refs": [
        "epoch_a: kind=ept label='ARRA-NRCS_Illinois_2010' n_ground_points=0 runtime_s=3.6",
        "epoch_b: kind=ept label='USGS_LPC_IL_GrnMacMont_2017_LAS_2018' n_ground_points=3025196 runtime_s=19.2"
      ],
      "meta": {
        "epoch_a": {
          "runtime_s": 3.580506511000067,
          "n_points": 0,
          "text_bytes": 12
        },
        "epoch_b": {
          "runtime_s": 19.176116409000088,
          "n_points": 3025196,
          "text_bytes": 93781088
        }
      },
      "landfill_id": 1877,
      "name": "Litchfield-Hillsboro LF",
      "state": "IL",
      "lat": 39.17,
      "lon": -89.615,
      "site_note": "poligono sintetico (buffer 200x200m sobre coordenada LMOP real), NO el parcel legal exacto",
      "datum_note": "UTM WGS84, no NAD83(2011) especifico por estado - ver docstring de lmop_mass_runner.py"
    }
  }
}