QGIS
Open SourceVerified
The free, open-source GIS that has become the default spatial platform for water engineers worldwide.
Geospatial & Hydro-GISActiveQGIS HydrologyTerrain Analysis
Global Watersheds
ActiveClick anywhere on earth, get the upstream watershed in seconds — free delineation in the browser.
- Pricing
- Free
- License
- —
- Commercial use
- Check licence
- Ecosystem
- Browser
- Platform
- Web
About Global Watersheds
Global Watersheds (mghydro.com) delineates the upstream catchment and downstream flow path from any point on earth, in the browser, in about a second — built on the MERIT-Hydro global hydrography dataset. Results export as shapefile, GeoJSON or KML, and a free API serves programmatic requests.
Accuracy inherits MERIT-Hydro's ~90 m resolution, so it is a screening and communication tool, not a design deliverable — but for "how big is the catchment above this bridge" moments, teaching, and proposal figures, nothing is faster. A genuinely useful free service by Matthew Heberger.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
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Geospatial & Hydro-GISActiveDEM ProcessingTerrain Analysis
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Gov-Public
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Geospatial & Hydro-GISActiveSatellite DEM DataDEM Processing