Watershed boundaries
Watershed and basin boundaries, the shape of where water flows.
WaterUSGSCommercial-clean
Live gauge pins
Water - Live data
River gauges
Live river gauges and streamflow from USGS stations.
Commercial-clean - free to reuse, with attribution.
Open on mapWater
At a glance
Coverage (inferred)
United States
Freshness
Live
License
Public Domain (US Gov)
Source
USGS
Provenance
Cartouche ยท Provenance
River gauges
Source
USGS Water Services, live
Method
Streamgage sensor observations
License
Public Domain (US Gov)Commercial OK
Attribution
USGS Water Services (public domain)
Coordinate system
EPSG:4326
Freshness
Live
Cite as
cartian:layer:usgs-water-gauges@ref-8d0b7f16
Version
vref-8d0b7f16
Pin
As-of referencefrozen 2026-07-19
More water layers
Water
Water field notes, articles and basins in one view.
WaterCartian communityCommercial-clean
Major rivers
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.
WaterHydroSHEDSCommercial-clean