{
  "site_name": "Courtney Ridge Landfill (Kansas City metro, MO)",
  "landfill_id": 2290,
  "lat": 39.141087,
  "lon": -94.388472,
  "source": "hand_run",
  "measurement": {
    "hard_fail": false,
    "native_srs_label": "UTM15N NAD83(2011) EPSG:6344",
    "epoch_a_date_nominal": "2006",
    "epoch_b_date_nominal": "2020",
    "epoch_dates_independently_verified": true,
    "usable_coverage_pct": 95.2,
    "n_stable_control_cells": 45871,
    "evidence_refs": [
      "epoch_a: kind=ept label='KS_JacksonCo_2006' n_ground_points=456654 runtime_s=7.1",
      "epoch_b: kind=ept label='MO_FEMANRCS_1_2020' n_ground_points=1418013 runtime_s=9.6"
    ],
    "meta": {
      "epoch_a": {
        "runtime_s": 7.1117660738527775,
        "n_points": 456654,
        "text_bytes": 14156286
      },
      "epoch_b": {
        "runtime_s": 9.581918245181441,
        "n_points": 1418013,
        "text_bytes": 43958415
      },
      "grid_nx": 500,
      "grid_ny": 500
    },
    "stable_control_offset_m": -0.0028,
    "stable_control_sigma_m": 0.3937,
    "detection_threshold_m": 1.1812,
    "volume_change_m3": 59.3,
    "uncertainty_m3": 7.2,
    "uncertainty_to_change_ratio": 0.1217,
    "classification": "DECISION_USEFUL_CHANGE_DETECTED",
    "site_note": "poligono sintetico (buffer 200x200m sobre coordenada LMOP real), NO el parcel legal exacto"
  },
  "verdict": {
    "verdict": "CHANGE_CONFIRMED",
    "confidence": 0.878,
    "declared_state": "Epoch A (2006) - reference/baseline surface",
    "observed_state": "Epoch B (2020) - current surface",
    "delta": {
      "volume_change_m3": 59.3,
      "uncertainty_m3": 7.2,
      "unit": "m3"
    },
    "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='KS_JacksonCo_2006' n_ground_points=456654 runtime_s=7.1",
        "nominal_date": "2006",
        "dates_independently_verified": true,
        "n_ground_points": 456654,
        "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": 7.2,
        "rights": "CC-BY 4.0"
      },
      {
        "source": "epoch_b: kind=ept label='MO_FEMANRCS_1_2020' n_ground_points=1418013 runtime_s=9.6",
        "nominal_date": "2020",
        "dates_independently_verified": true,
        "n_ground_points": 1418013,
        "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": 7.2,
        "rights": "CC-BY 4.0"
      }
    ],
    "recommended_next_action": "None - result is decisive.",
    "raw_measurement": {
      "hard_fail": false,
      "native_srs_label": "UTM15N NAD83(2011) EPSG:6344",
      "epoch_a_date_nominal": "2006",
      "epoch_b_date_nominal": "2020",
      "epoch_dates_independently_verified": true,
      "usable_coverage_pct": 95.2,
      "n_stable_control_cells": 45871,
      "evidence_refs": [
        "epoch_a: kind=ept label='KS_JacksonCo_2006' n_ground_points=456654 runtime_s=7.1",
        "epoch_b: kind=ept label='MO_FEMANRCS_1_2020' n_ground_points=1418013 runtime_s=9.6"
      ],
      "meta": {
        "epoch_a": {
          "runtime_s": 7.1117660738527775,
          "n_points": 456654,
          "text_bytes": 14156286
        },
        "epoch_b": {
          "runtime_s": 9.581918245181441,
          "n_points": 1418013,
          "text_bytes": 43958415
        },
        "grid_nx": 500,
        "grid_ny": 500
      },
      "stable_control_offset_m": -0.0028,
      "stable_control_sigma_m": 0.3937,
      "detection_threshold_m": 1.1812,
      "volume_change_m3": 59.3,
      "uncertainty_m3": 7.2,
      "uncertainty_to_change_ratio": 0.1217,
      "classification": "DECISION_USEFUL_CHANGE_DETECTED",
      "site_note": "poligono sintetico (buffer 200x200m sobre coordenada LMOP real), NO el parcel legal exacto"
    }
  },
  "independent_cross_check": {
    "mass_run_hard_fail": false,
    "mass_run_volume_change_m3": 59.3,
    "mass_run_offset_m": -0.0027,
    "mass_run_sigma_m": 0.3938
  }
}