{
  "site_name": "Denver Regional Landfill (North) (CO)",
  "landfill_id": 1739,
  "lat": 40.0439,
  "lon": -105.00414,
  "source": "mass_run",
  "measurement": {
    "hard_fail": true,
    "native_srs_label": "UTM13 WGS84 EPSG:32613",
    "epoch_a_date_nominal": "2013",
    "epoch_b_date_nominal": "2020",
    "epoch_dates_independently_verified": true,
    "usable_coverage_pct": 0.0,
    "n_stable_control_cells": 26038,
    "evidence_refs": [
      "epoch_a: kind=ept label='USGS_LPC_CO_SoPlatteRiver_Lot5_2013_LAS_2015' n_ground_points=685476 runtime_s=9.1",
      "epoch_b: kind=ept label='CO_DRCOG_2_2020' n_ground_points=2488652 runtime_s=15.2"
    ],
    "meta": {
      "epoch_a": {
        "runtime_s": 9.11396273000014,
        "n_points": 685476,
        "text_bytes": 21935244
      },
      "epoch_b": {
        "runtime_s": 15.175430315999847,
        "n_points": 2488652,
        "text_bytes": 79636876
      },
      "grid_nx": 500,
      "grid_ny": 500
    },
    "hard_fail_reason": "puerta de calidad de dato: n_stable_control_cells=26038 (<200) o usable_coverage_pct=0.0 (<50%)",
    "landfill_id": 1739,
    "name": "Denver Regional Landfill (North)",
    "state": "CO",
    "lat": 40.0439,
    "lon": -105.00414,
    "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 (2013) - 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='USGS_LPC_CO_SoPlatteRiver_Lot5_2013_LAS_2015' n_ground_points=685476 runtime_s=9.1",
        "nominal_date": "2013",
        "dates_independently_verified": true,
        "n_ground_points": 685476,
        "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='CO_DRCOG_2_2020' n_ground_points=2488652 runtime_s=15.2",
        "nominal_date": "2020",
        "dates_independently_verified": true,
        "n_ground_points": 2488652,
        "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": "UTM13 WGS84 EPSG:32613",
      "epoch_a_date_nominal": "2013",
      "epoch_b_date_nominal": "2020",
      "epoch_dates_independently_verified": true,
      "usable_coverage_pct": 0.0,
      "n_stable_control_cells": 26038,
      "evidence_refs": [
        "epoch_a: kind=ept label='USGS_LPC_CO_SoPlatteRiver_Lot5_2013_LAS_2015' n_ground_points=685476 runtime_s=9.1",
        "epoch_b: kind=ept label='CO_DRCOG_2_2020' n_ground_points=2488652 runtime_s=15.2"
      ],
      "meta": {
        "epoch_a": {
          "runtime_s": 9.11396273000014,
          "n_points": 685476,
          "text_bytes": 21935244
        },
        "epoch_b": {
          "runtime_s": 15.175430315999847,
          "n_points": 2488652,
          "text_bytes": 79636876
        },
        "grid_nx": 500,
        "grid_ny": 500
      },
      "hard_fail_reason": "puerta de calidad de dato: n_stable_control_cells=26038 (<200) o usable_coverage_pct=0.0 (<50%)",
      "landfill_id": 1739,
      "name": "Denver Regional Landfill (North)",
      "state": "CO",
      "lat": 40.0439,
      "lon": -105.00414,
      "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"
    }
  }
}