MEASURED — DECISION_USEFUL_CHANGE_DETECTED
Langley Landfill (SC)
Volume change between 2012 and 2019, measured from two independent real LiDAR epochs, calibrated against a stable-terrain control ring.
| Field | Value |
|---|---|
| Verdict | CHANGE_CONFIRMED |
| Confidence | 0.937 |
| Epochs | 2012 → 2019 |
| Volume change | -136.6 ± 8.6 m³ |
| Coverage | 89.7% |
| Stable-control sigma | 0.1451 m |
| Classification | DECISION_USEFUL_CHANGE_DETECTED |
| Recommended next action | None - result is decisive. |
Machine-readable measurement (full evidence, same numbers as this page):
lmop-1920.json
Method: measure_physical_change() — same unmodified function used across every site in this program, real LiDAR/3DEP epochs via the public hobuinc/usgs-lidar EPT index, calibrated against a stable-terrain control ring. Synthetic 200x200m buffer on the LMOP-declared coordinate — never the legal parcel boundary. Full method: /products/physical-change/.