dataset · Global

WWF HydroSHEDS Hydrologically Conditioned DEM, 3 Arc-Seconds

HydroSHEDS is a mapping product that provides hydrographic information for regional and global-scale applications in a consistent format. It offers a suite of geo-referenced datasets (vector and raster) at various scales, including river networks, watershed boundaries, drainage directions, and flow accumulations. HydroSHEDS is based on elevation data obtained in 2000 by NASA's Shuttle Radar Topography Mission (SRTM). This hydrologically conditioned elevation dataset is the result of an iterative

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Source details

Licence: proprietary

Evidence quality: 37.7

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: hydrologically conditioned DEM (elevation) · drainage (flow) direction
Coverage llm-inferred: Global (per ENTRY regions) · 2000-02-11 to 2000-02-22
Resolution docs-verified: 3 arc-seconds (92.77 m pixel)
Formats docs-verified: Earth Engine ee.Image (raster)
Access docs-verified: Free for non-commercial and commercial use per HydroSHEDS terms; requires Google Earth Engine registration. ENTRY licence field says 'proprietary'.

Useful for

Use cases llm-inferred: FRA flow-path and catchment delineation from drainage direction data · Regional terrain and hydrography context for drainage strategy screening · Water-body and catchment context for ecological baseline reporting
Audience llm-inferred: flood consultants · hydrologists · drainage engineers · GIS analysts

Limitations

Constraints docs-verified: Conditioning alters the original DEM and may be incorrect for uses other than drainage directions · Incorrect negative values of -100 near Vancouver, Canada and Australia · Endorheic basins are seeded with a no-data cell at their lowest point · Elevation derived from SRTM 2000 data · Requires Google Earth Engine registration

Evidence

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