MEASURED — DECISION_USEFUL_CHANGE_DETECTED
Quarry Hills Soils LF (MA)
Volume change between 2015 and 2021, measured from two independent real LiDAR epochs, calibrated against a stable-terrain control ring.
| Field | Value |
|---|---|
| Epochs | 2015 → 2021 |
| Volume change | 121.9 ± 4.1 m³ |
| Coverage | 87.0% |
| Stable-control sigma | 0.0687 m |
| Classification | DECISION_USEFUL_CHANGE_DETECTED |
Machine-readable measurement (full evidence, same numbers as this page):
lmop-10641.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/.