Free / commercial imagery

Pegada da Mina e Perturbação

Cavas a céu aberto, pilhas de estéril e limites de rejeitos, acompanhados entre datas em uma grade comum.

Perturbação de superfície multitemporal, limites de rejeitos e pegadas de pilhas de estéril, medidos entre datas.

In view

Open-cast workings. Footprint boundaries are differenced between dates.

O QUE ELA ENCONTRA

O que ela detecta.

Material	Contexto típico	O que pode confundi-la
Mining Surface Disturbance Footprint	Open-pit and underground mine sites globally	Natural seasonal vegetation dieback in surrounding wildlands

MÉTODO

Como funciona.

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

01Step 1

Pairing the two dates

Both scenes are placed on a common grid. Differencing across sensors is refused, and so is differencing a result from one engine against a result from another.

02Step 2

Differencing with the offset exposed

Raw differencing on layers that carry an absolute scale on both dates. The scene-wide median offset is shown and can be removed, so a seasonal brightness shift is visible as such rather than mistaken for new ground.

03Step 3

Segmentation into facility classes

Disturbance is split into pit, waste rock, ponds and infrastructure by shape and spectrum together.

04Step 4

Overlay against the permitted boundary

Polygons are intersected with the boundary you supply and reported inside and outside, in km² to one decimal. An all-empty difference raises rather than reporting that nothing changed.

ESPECIFICAÇÕES

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

Valores entreguesDifference of two absolute layers, floating point

SaídaDisturbance polygons with area inside and outside the boundary

Prazo de entregaBoth dates must be held before differencing; multispectral archives fetch quickly

Formatos

GeoJSON Disturbance FeatureCollectionCloud-Optimized GeoTIFF (COG)Provenance record (both scene ids, method version, offset applied)

Condições de que precisa

Sun angle limit:60°

Cloud cover limit:10%

Vegetation cover limit:100%

Method and checks are documented in Axine Applied Spectroscopy Paper #1 · Section 10.2.

Ler o artigo

Escopo

Surface disturbance only. Underground workings and wall stability sit outside what it reaches.

EXECUTE SOBRE O SEU TERRENO

Execute esta camada sobre a sua própria área.

Solicite processamento sobre a sua área de interesse, ou uma captura programada onde o acervo não tiver nada utilizável. O acesso às imagens de satélite nunca é cobrado: um plano compra os modelos.

Abrir o Lisaris

ANALÍTICAS COMPLEMENTARES