dataset · Global

CLMS Water Bodies (WB) Global 100m monthly V1 (COG)

Provides monthly maps of permanent water body extent at global scale in the spatial resolution of 100 m.

Source details

Licence: other

Evidence quality: 43.6

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

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

Data offered docs-verified: monthly permanent water body extent (global) · water body detection band (wb: water / no water) · water body occurrence quality flag (qual: very low to permanent classes)
Coverage docs-verified: Global (bbox approx. -180 to 180 longitude, -60 to 80 latitude) · 2020-10-01 onward (open-ended interval)
Resolution docs-verified: 100 m spatial; monthly temporal
Update frequency docs-verified: Monthly maps; product timeliness P1M, category OFFL (offline)
Formats docs-verified: GeoTIFF (cloud-optimized COG) · STAC JSON metadata · ZIP product archive
Access docs-verified: Licence 'other' under the Copernicus Land Monitoring Service data policy. Asset access uses CDSE authentication: OpenID Connect for HTTPS, S3 credentials for S3. CREODIAS S3 is requester-pays. Free status is not stated in the docs.

Use cases llm-inferred: Permanent water body screening for FRA watercourse and floodplain context · Waterbody and wetland baseline mapping for BNG habitat assessments · Long-term water extent change checks for reservoirs and lakes in water-resource or abstraction reviews
Audience llm-inferred: flood consultants · hydrologists · ecologists · GIS analysts

Constraints llm-inferred: Bounding box stops at about 80 N and 60 S, so polar areas are outside coverage · 100 m pixels are too coarse for small ponds, ditches and narrow watercourses · Series starts 2020-10-01, so there is no pre-2020 baseline · Cloud-masked pixels (class 252) appear as gaps in the quality layer · Assets need CDSE authentication, and CREODIAS S3 is requester-pays · Licence is 'other', so check the Copernicus data policy before client re-use · Timeliness category is OFFL, so this is not a near-real-time feed

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