dataset · Global

Harmonized Sentinel-2 MSI: MultiSpectral Instrument, Level-2A (SR)

After 2022-01-25, Sentinel-2 scenes with PROCESSING_BASELINE '04.00' or above have their DN (value) range shifted by 1000. The HARMONIZED collection shifts data in newer scenes to be in the same range as in older scenes. Sentinel-2 is a wide-swath, high-resolution, multi-spectral imaging mission supporting Copernicus Land Monitoring studies, including the monitoring of vegetation, soil and water cover, as well as observation of inland waterways and coastal areas. The Sentinel-2 L2 data are downl

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Source details

Licence: proprietary

Evidence quality: 28.3

Listed in gee public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

What's in it

Data offered docs-verified: Surface reflectance, 12 UINT16 bands (SR scaled by 10000) · Aerosol Optical Thickness (AOT) · Water Vapour Pressure (WVP) · Scene Classification Map (SCL) · Cloud probability map (MSK_CLDPRB) · Snow probability map (MSK_SNWPRB) · Cloud mask (QA60) and opaque/cirrus cloud classification bands · Snow/ice classification band · True colour image (TCI_R/G/B) · Per-scene quality and viewing/solar geometry metadata
Coverage docs-verified: Global (2017–2018 L2 coverage in the EE collection is not yet global) · From 2017-03-28 (catalogue availability listed to 2026-10-16)
Resolution docs-verified: Spatial: 10 m (B2–B4, B8, TCI, AOT, WVP), 20 m (B5–B7, B8A, B11–B12, SCL, cloud probability), 60 m (B1, B9, QA60, MSK_CLASSI_*)
Update frequency docs-verified: 5-day revisit interval; catalogue ingest cadence not stated
Formats docs-verified: Google Earth Engine ImageCollection
Access docs-verified: Google Earth Engine catalogue dataset; use governed by Copernicus Sentinel Data Terms and Conditions (ENTRY metadata lists licence as 'proprietary')

Useful for

Use cases llm-inferred: Vegetation and bare-soil condition time series for BNG habitat baseline on a site · Surface water extent screening for flood risk baseline mapping (NDWI-style indices) · Cloud-masked seasonal composites for land-cover change on earthworks or restoration sites
Audience llm-inferred: GIS analysts · ecologists · hydrologists · planners

Limitations

Constraints docs-verified: 2017–2018 Level-2 coverage in the EE collection is not yet global · No B10 band (unlike L1 data) · QA60 cloud-mask polygons stopped being produced after 2022-01-25 · QA60 masked out between 2022-01-25 and 2024-02-28 inclusive · MSK_CLASSI_* cloud and snow bands masked out before February 2024 · QA10 and QA20 are always empty · Requires the Earth Engine platform

Evidence

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.