dataset · Global
CLMS Water Bodies (WB) Global 300m monthly V2 (COG)
Provides information about the surface extent covered by water on a permanent basis. The data are available at global scale in the spatial resolution of 300 m, available monthly, from 2020 to present.
Visit source ↗Source details
Licence: other
Evidence quality: 42.4
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
- surface water body extent (wb band: water / no water, sea class) · water body occurrence quality flag (qual band: very_low, low, medium, high, very_high, permanent, plus cloud/no_data masks)
- Coverage docs-verified
- Global (bbox approx. -180 to 180 lon, -60 to 80 lat) · 2020-10-01 to present (open-ended interval)
- Resolution docs-verified
- 300 m spatial; monthly temporal
- Update frequency docs-verified
- Monthly
- Formats docs-verified
- GeoTIFF (cloud-optimized COG) · ZIP (zipped product archive)
- Access llm-inferred
- Licence 'other' (Copernicus Land Monitoring Service data policy). Asset hrefs use S3 and HTTPS with OpenID Connect auth refs (CDSE credentials); creodias-s3 storage is requester-pays. Free access not explicitly stated.
Useful for
- Use cases llm-inferred
- Permanent and high-occurrence water mask to exclude open water from site surface-water baselines · Monthly surface-water occurrence screening for reservoir, lake and wetland context in water-resources or drainage assessments · Supporting wetland and open-water context for BNG habitat baseline mapping
- Audience llm-inferred
- hydrologists · GIS analysts · ecologists · flood consultants · drainage engineers
Limitations
- Constraints llm-inferred
- 300 m resolution is too coarse for small watercourses, ponds and narrow channels at site scale in the UK · Description says 'permanent basis' but the product is a monthly occurrence series; use the qual band for occurrence rather than treating it as a static permanent mask · Cloud-masked (252) and no-data (251) pixels create gaps in monthly composites · Licence is 'other'; check the Copernicus data policy before redistribution · creodias-s3 storage is requester-pays · Requires CDSE authentication for some storage paths
Evidence
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.