dataset · Global
CLMS Soil Water Index (SWI) Global 12.5km daily V4 (COG)
Provides daily updates on the moisture conditions in different soil layers. The data are available over the globe at the spatial resolution of 12.5 km from 2025 onwards.
Visit source ↗Source details
Licence: other
Evidence quality: 43.8
Listed in cdse-stac 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
- Soil Water Index (SWI) at T=1, 5, 10, 15, 20, 40, 60 and 100 · quality flags for each SWI T value (qflag001 to qflag100) · Surface State Flag (ssf): unfrozen, frozen, unknown
- Coverage docs-verified
- Global · 2007-01-01T12:00:00Z onwards (open-ended)
- Resolution docs-verified
- 12.5 km spatial; daily temporal
- Update frequency docs-verified
- Daily (product timeliness P1D, offline category OFFL)
- Formats docs-verified
- GeoTIFF (cloud-optimized COG) · application/zip (full product archive) · STAC 1.1.0 JSON metadata
- Access docs-verified
- Licence 'other' (Copernicus Land Monitoring Service data policy). Assets require authentication: OIDC for HTTPS, S3 credentials for CDSE/CREODIAS object storage. Cost not stated.
Useful for
- Use cases llm-inferred
- Antecedent soil moisture context for flood risk assessment and runoff screening · Soil wetness time series as input to drainage or SuDS design discussions · Frozen/unfrozen surface screening for earthworks scheduling using the Surface State Flag · Regional wetness or drought baseline for ecology and BNG context
- Audience llm-inferred
- hydrologists · flood consultants · drainage engineers · geotechnical engineers · environmental consultants · GIS analysts
Limitations
- Constraints docs-verified
- 12.5 km grid is coarse for site-scale assessment · Description says data are available from 2025 onwards, but the STAC temporal extent starts 2007-01-01; verify before relying on pre-2025 records · Surface State Flag is 'unknown' where no meteorological forecast is available · temporary_water surface state is deprecated in V4 · Licence is 'other'; check the data policy before reuse · Download requires CDSE or CREODIAS credentials
Evidence
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.