{
  "site_name": "El Centro Landfill (TX)",
  "landfill_id": 2441,
  "lat": 27.722147,
  "lon": -97.655782,
  "source": "mass_run",
  "measurement": {
    "hard_fail": true,
    "native_srs_label": "UTM14 WGS84 EPSG:32614",
    "epoch_a_date_nominal": "2010",
    "epoch_b_date_nominal": "2018",
    "epoch_dates_independently_verified": true,
    "usable_coverage_pct": 85.8,
    "n_stable_control_cells": 65498,
    "evidence_refs": [
      "epoch_a: kind=ept label='ARRA-TX_NuecesCo_2010' n_ground_points=339650 runtime_s=10.9",
      "epoch_b: kind=ept label='USGS_LPC_TX_South_B5_2018_LAS_2019' n_ground_points=3033556 runtime_s=15.3"
    ],
    "meta": {
      "epoch_a": {
        "runtime_s": 10.850370727000154,
        "n_points": 339650,
        "text_bytes": 10189512
      },
      "epoch_b": {
        "runtime_s": 15.344824114999938,
        "n_points": 3033556,
        "text_bytes": 91006692
      },
      "grid_nx": 500,
      "grid_ny": 500
    },
    "stable_control_offset_m": 0.11,
    "stable_control_sigma_m": 1.8014,
    "hard_fail_reason": "datum/alineacion: stable_control_sigma_m=1.8014 (>1.0) o |stable_control_offset_m|=0.1100 (>2.0)",
    "landfill_id": 2441,
    "name": "El Centro Landfill",
    "state": "TX",
    "lat": 27.722147,
    "lon": -97.655782,
    "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_ALIGNMENT_FAILURE",
    "confidence": null,
    "declared_state": "Epoch A (2010) - reference/baseline surface",
    "observed_state": "Epoch B (2018) - 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-TX_NuecesCo_2010' n_ground_points=339650 runtime_s=10.9",
        "nominal_date": "2010",
        "dates_independently_verified": true,
        "n_ground_points": 339650,
        "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_TX_South_B5_2018_LAS_2019' n_ground_points=3033556 runtime_s=15.3",
        "nominal_date": "2018",
        "dates_independently_verified": true,
        "n_ground_points": 3033556,
        "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": "UTM14 WGS84 EPSG:32614",
      "epoch_a_date_nominal": "2010",
      "epoch_b_date_nominal": "2018",
      "epoch_dates_independently_verified": true,
      "usable_coverage_pct": 85.8,
      "n_stable_control_cells": 65498,
      "evidence_refs": [
        "epoch_a: kind=ept label='ARRA-TX_NuecesCo_2010' n_ground_points=339650 runtime_s=10.9",
        "epoch_b: kind=ept label='USGS_LPC_TX_South_B5_2018_LAS_2019' n_ground_points=3033556 runtime_s=15.3"
      ],
      "meta": {
        "epoch_a": {
          "runtime_s": 10.850370727000154,
          "n_points": 339650,
          "text_bytes": 10189512
        },
        "epoch_b": {
          "runtime_s": 15.344824114999938,
          "n_points": 3033556,
          "text_bytes": 91006692
        },
        "grid_nx": 500,
        "grid_ny": 500
      },
      "stable_control_offset_m": 0.11,
      "stable_control_sigma_m": 1.8014,
      "hard_fail_reason": "datum/alineacion: stable_control_sigma_m=1.8014 (>1.0) o |stable_control_offset_m|=0.1100 (>2.0)",
      "landfill_id": 2441,
      "name": "El Centro Landfill",
      "state": "TX",
      "lat": 27.722147,
      "lon": -97.655782,
      "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"
    }
  }
}