Selective Logging Audit
Canopy gaps, skid trails and log landings picked up by sub-pixel unmixing, checked against your concession boundary.
Sub-pixel unmixing for skid trails, canopy gap disturbance and harvest compliance over a concession.
Harvest gaps, skid trails and landing decks separated by their non-photosynthetic fraction.
WHAT IT FINDS
What it detects.
| Material | Typical setting | What can confuse it |
|---|---|---|
| Selective Logging Gaps & Skid Corridors | Tropical rainforests, temperate hardwood concessions, and conservation reserves | Natural tree-fall gaps and windthrow patches |
METHOD
How it works.
Calibrated reflectance goes in, and every pixel is fitted against a public reference library.
Reflectance ingest
Scenes are read at surface reflectance and reprojected onto a common grid, never resampled.
Fraction unmixing per pixel
Each pixel is decomposed into green vegetation, non-photosynthetic vegetation and soil. Slash and fresh soil are what a selective harvest leaves behind, and both sit in the second and third fractions.
Linear feature extraction
Directional filters connect skid tracks and landings that would be unremarkable pixel by pixel.
Overlay against the concession boundary
Disturbance polygons are intersected with the boundary you supply, and the area inside and outside is reported separately. No timber volume is estimated, because reflectance does not carry it.
SPECIFICATIONS
What you get, and what it runs on.
Conditions it needs
Method and checks are documented in Axine Applied Spectroscopy Paper #4 · Section 6.1.
Scope
Works on gaps in the canopy. A tree taken out without breaking the crown above it leaves nothing to see.
RUN IT OVER YOUR GROUND
Run this layer over your own area.
Order processing over your area of interest, or a tasked capture where the archive has nothing usable. Imagery access is never charged for: a plan buys the models.
COMPLEMENTARY ANALYTICS
Related layers.
Canopy Stress Screening
Foliar water content, measured against a dry-matter baseline and compared across acquisitions.
Wildfire Burn Severity & Recovery
Burn severity between paired dates, with char and ash unmixed so a partly burned pixel reads as partly burned.
Canopy Chlorophyll & Red-Edge
Red-edge position, which follows canopy pigment. Refused on sensors that cannot resolve it.