{
  "site_name": "Ben Lomond Solid Waste Disposal Site (CA)",
  "landfill_id": 63,
  "lat": 37.09375,
  "lon": -122.07535,
  "source": "mass_run",
  "measurement": {
    "hard_fail": true,
    "native_srs_label": "UTM10 WGS84 EPSG:32610",
    "epoch_a_date_nominal": "2010",
    "epoch_b_date_nominal": "2020",
    "epoch_dates_independently_verified": true,
    "usable_coverage_pct": 15.1,
    "n_stable_control_cells": 33984,
    "evidence_refs": [
      "epoch_a: kind=ept label='ARRA-CA_CentralCoast-Z3_2010' n_ground_points=294699 runtime_s=11.3",
      "epoch_b: kind=ept label='CA_SantaCruzCounty_2020' n_ground_points=9110240 runtime_s=105.4"
    ],
    "meta": {
      "epoch_a": {
        "runtime_s": 11.324468003999982,
        "n_points": 294699,
        "text_bytes": 9133542
      },
      "epoch_b": {
        "runtime_s": 105.35246205099997,
        "n_points": 9110240,
        "text_bytes": 282309221
      },
      "grid_nx": 500,
      "grid_ny": 500
    },
    "hard_fail_reason": "puerta de calidad de dato: n_stable_control_cells=33984 (<200) o usable_coverage_pct=15.1 (<50%)",
    "landfill_id": 63,
    "name": "Ben Lomond Solid Waste Disposal Site",
    "state": "CA",
    "lat": 37.09375,
    "lon": -122.07535,
    "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_LOW_DATA_QUALITY",
    "confidence": null,
    "declared_state": "Epoch A (2010) - reference/baseline surface",
    "observed_state": "Epoch B (2020) - 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-CA_CentralCoast-Z3_2010' n_ground_points=294699 runtime_s=11.3",
        "nominal_date": "2010",
        "dates_independently_verified": true,
        "n_ground_points": 294699,
        "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='CA_SantaCruzCounty_2020' n_ground_points=9110240 runtime_s=105.4",
        "nominal_date": "2020",
        "dates_independently_verified": true,
        "n_ground_points": 9110240,
        "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,
      "native_srs_label": "UTM10 WGS84 EPSG:32610",
      "epoch_a_date_nominal": "2010",
      "epoch_b_date_nominal": "2020",
      "epoch_dates_independently_verified": true,
      "usable_coverage_pct": 15.1,
      "n_stable_control_cells": 33984,
      "evidence_refs": [
        "epoch_a: kind=ept label='ARRA-CA_CentralCoast-Z3_2010' n_ground_points=294699 runtime_s=11.3",
        "epoch_b: kind=ept label='CA_SantaCruzCounty_2020' n_ground_points=9110240 runtime_s=105.4"
      ],
      "meta": {
        "epoch_a": {
          "runtime_s": 11.324468003999982,
          "n_points": 294699,
          "text_bytes": 9133542
        },
        "epoch_b": {
          "runtime_s": 105.35246205099997,
          "n_points": 9110240,
          "text_bytes": 282309221
        },
        "grid_nx": 500,
        "grid_ny": 500
      },
      "hard_fail_reason": "puerta de calidad de dato: n_stable_control_cells=33984 (<200) o usable_coverage_pct=15.1 (<50%)",
      "landfill_id": 63,
      "name": "Ben Lomond Solid Waste Disposal Site",
      "state": "CA",
      "lat": 37.09375,
      "lon": -122.07535,
      "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"
    }
  }
}