Water
Water field notes, articles and basins in one view.
WaterCartian communityCommercial-clean
Basin boundaries
Water - Maps & datasets
Watershed boundaries
Watershed and basin boundaries, the shape of where water flows.
Commercial-clean - free to reuse, with attribution.
Open on mapWater
At a glance
Coverage (inferred)
United States
Freshness
2026
License
Public Domain (US Gov)
Source
USGS
Provenance
Cartouche ยท Provenance
Watershed boundaries
Source
USGS WBD - HUC, 2026
Method
Reference dataset
License
Public Domain (US Gov)Commercial OK
Attribution
USGS / USDA-NRCS Watershed Boundary Dataset (public domain)
Coordinate system
EPSG:4326
Freshness
2026
Cite as
cartian:layer:land-watersheds@ref-311a5383
Version
vref-311a5383
Pin
As-of referencefrozen 2026-07-19
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Curated simplified major-rivers subset served as a static app-hosted GeoJSON (public/geo/major-rivers.geojson) - zero server, cost-lean path 2. A coarse cartographic overlay of the world's principal rivers, not a precise hydrological product. Off by default, opt-in. Full HydroRIVERS network + HydroATLAS attributes are DEFER (download-only, no free hosted tiles without a tiler). Swap MAJOR_RIVERS_URL to a fuller simplified export to upgrade.
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