Axine Labs
Free / commercial imagery

Auditoria de Corte Seletivo

Clareiras no dossel, trilhas de arraste e pátios de toras captados por desmistura subpixel, verificados contra o limite da sua concessão.

Desmistura subpixel para trilhas de arraste, perturbação de clareiras no dossel e conformidade de colheita sobre uma concessão.

Auditoria de Corte Seletivo
In view

Harvest gaps, skid trails and landing decks separated by their non-photosynthetic fraction.

O QUE ELA ENCONTRA

O que ela detecta.

MaterialContexto típicoO que pode confundi-la
Selective Logging Gaps & Skid CorridorsTropical rainforests, temperate hardwood concessions, and conservation reservesNatural tree-fall gaps and windthrow patches

MÉTODO

Como funciona.

Entra reflectância calibrada, e cada pixel é ajustado contra uma biblioteca pública de referência.

01Step 1

Reflectance ingest

Scenes are read at surface reflectance and reprojected onto a common grid, never resampled.

02Step 2

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.

03Step 3

Linear feature extraction

Directional filters connect skid tracks and landings that would be unremarkable pixel by pixel.

04Step 4

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.

ESPECIFICAÇÕES

O que você recebe, e sobre o que ela roda.

Valores entreguesCover fractions, floating point, summing to one where the pixel is evaluable
SaídaForest disturbance polygons with cover fractions
Prazo de entregaTropical cloud, not processing, decides when a usable scene exists
Formatos
GeoJSON Disturbance VectorsCloud-Optimized GeoTIFF (COG)Provenance record (scene ids, method version, boundary used)

Condições de que precisa

Sun angle limit:50°
Cloud cover limit:10%
Vegetation cover limit:100%

Method and checks are documented in Axine Applied Spectroscopy Paper #4 · Section 6.1.

Ler o artigo

Escopo

Works on gaps in the canopy. A tree taken out without breaking the crown above it leaves nothing to see.