spot-1-5

CNES/Airbus SPOT 1–5 World Heritage collection. ~6 million scenes spanning 1986–2015, released as open data under CC-BY-SA-2.0. Unique 30-year historical baseline at 2.5–20 m resolution — the longest-running sub-30m open optical archive. SPOT 1–3 are 20 m multispectral / 10 m panchromatic; SPOT 4 adds SWIR; SPOT 5 reaches 2.5 m super-resolved. Primary use: long-baseline change detection (deforestation, urbanization, coastline evolution) before Sentinel and Landsat 8 era.

Sensor	HRV / HRVIR / HRG (SPOT 1–5 optical)
Resolution	2.5m–20m (varies by sensor and mode)
Revisit (days)	26
STAC	—
GEE	—