Theia / Data Terra Catalogue - Hydroweb Operational Altimetry River & Lake Water Level
Theia (Data Terra) catalogue distributing operational satellite-altimetry-derived river and lake water level, extent and storage products (HySOpe processing chain), updated within 3 days of last satellite pass. Also hosts SWOT L2 HR Raster collections.
catalogue.theia.data-terra.org
At a glance
- Region
- France (Global)
- Coverage
- Global
- Access
- Free
- Category
- Research Institute
- Last updated
- 2026
What's inside
- water level
- satellite altimetry
- lakes
- rivers
- SWOT
What you can do with it
Typical work that data of this type supports.
- 01
Storage tracking
Follow storage and releases through the season.
Because it has: water level
- 02
Change over time
See how lakes and wetlands have grown or shrunk.
- 03
No-gauge areas
Monitor places with no ground stations.
Because it has: satellite altimetry
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Storage from space
Estimate volume from satellite water area and altimetry.
- 02
Release decisions
Optimise releases against inflow forecasts.
- 03
Segmentation
Map water, crops and land use pixel by pixel with deep learning.
Machine access and documentation
Open API
STAC/OpenSearch catalogue API at catalogue.theia.data-terra.org
Licence: Open data
Listed in our registry of open water APIs, which WaterDataGPT can query live.
Related water data
- Hydroweb LEGOS - Satellite Altimetry Water Levels of Rivers and LakesGlobal | Free
- PO.DAAC Cookbook - SWOT Hydrology Data AccessGlobal | Free
- Copernicus In Situ - Hydrological Data for Water Level AltimetryEurope | Free
- Hydroweb Satellite Altimetry for Inland Waters (LEGOS/CNES)Global | Registration Required
- Natural Earth Water VectorsGlobal | Free
- Sentinel-6 Michael Freilich Radar AltimetryGlobal | Free
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