{
  "site_name": "Sand Valley Landfill (AL)",
  "landfill_id": 2410,
  "lat": 34.342,
  "lon": -85.862,
  "source": "mass_run",
  "measurement": {
    "hard_fail": true,
    "native_srs_label": "UTM16 WGS84 EPSG:32616",
    "epoch_a_date_nominal": "2012",
    "epoch_b_date_nominal": "2020",
    "epoch_dates_independently_verified": true,
    "usable_coverage_pct": 99.4,
    "n_stable_control_cells": 81616,
    "evidence_refs": [
      "epoch_a: kind=ept label='USGS_LPC_AL_ThreeCo_2012_LAS_2015' n_ground_points=830139 runtime_s=13.6",
      "epoch_b: kind=ept label='AL_17Co_1_2020' n_ground_points=4552079 runtime_s=46.1"
    ],
    "meta": {
      "epoch_a": {
        "runtime_s": 13.615389513000082,
        "n_points": 830139,
        "text_bytes": 25734321
      },
      "epoch_b": {
        "runtime_s": 46.12401394799997,
        "n_points": 4552079,
        "text_bytes": 141114461
      },
      "grid_nx": 500,
      "grid_ny": 500
    },
    "stable_control_offset_m": 0.8296,
    "stable_control_sigma_m": 4.6175,
    "hard_fail_reason": "datum/alineacion: stable_control_sigma_m=4.6175 (>1.0) o |stable_control_offset_m|=0.8296 (>2.0)",
    "landfill_id": 2410,
    "name": "Sand Valley Landfill",
    "state": "AL",
    "lat": 34.342,
    "lon": -85.862,
    "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 (2012) - 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_AL_ThreeCo_2012_LAS_2015' n_ground_points=830139 runtime_s=13.6",
        "nominal_date": "2012",
        "dates_independently_verified": true,
        "n_ground_points": 830139,
        "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='AL_17Co_1_2020' n_ground_points=4552079 runtime_s=46.1",
        "nominal_date": "2020",
        "dates_independently_verified": true,
        "n_ground_points": 4552079,
        "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": "UTM16 WGS84 EPSG:32616",
      "epoch_a_date_nominal": "2012",
      "epoch_b_date_nominal": "2020",
      "epoch_dates_independently_verified": true,
      "usable_coverage_pct": 99.4,
      "n_stable_control_cells": 81616,
      "evidence_refs": [
        "epoch_a: kind=ept label='USGS_LPC_AL_ThreeCo_2012_LAS_2015' n_ground_points=830139 runtime_s=13.6",
        "epoch_b: kind=ept label='AL_17Co_1_2020' n_ground_points=4552079 runtime_s=46.1"
      ],
      "meta": {
        "epoch_a": {
          "runtime_s": 13.615389513000082,
          "n_points": 830139,
          "text_bytes": 25734321
        },
        "epoch_b": {
          "runtime_s": 46.12401394799997,
          "n_points": 4552079,
          "text_bytes": 141114461
        },
        "grid_nx": 500,
        "grid_ny": 500
      },
      "stable_control_offset_m": 0.8296,
      "stable_control_sigma_m": 4.6175,
      "hard_fail_reason": "datum/alineacion: stable_control_sigma_m=4.6175 (>1.0) o |stable_control_offset_m|=0.8296 (>2.0)",
      "landfill_id": 2410,
      "name": "Sand Valley Landfill",
      "state": "AL",
      "lat": 34.342,
      "lon": -85.862,
      "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"
    }
  }
}