45 study areas across BC's Coastal Western Hemlock (CWH) zone.
XGBoost model · 10 m GEE satellite embeddings · 2024 imagery.
Predicted probability of Pacific yew (Taxus brevifolia) habitat
using XGBoost trained on iNaturalist observations and
Google Earth Engine satellite embeddings. Each tile covers ~10×10 km.
Use the observation panel (top right) to report yew sightings
and improve the model.
Estimated yew habitat destroyed by logging in each BEC subzone, based on yew prevalence in surviving old-growth forest (P≥0.5). Covers 99 of 100 tiles (~9,900 km²) across the CWH, ICH, and other zones.
Yew probability is scaled by a linear fire-recovery modifier:
0 for a fire in 2024 (complete suppression) → 1 for a fire in 1900 (full recovery).
Formula: (2024 − fire_year) / 124.
Full CWH zone (3.60 Mha) — all recorded fires since 1910, clipped to the CWH boundary. 6.6% of the CWH zone has burned at least once in recorded history.
| Type | Lat | Lon |
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