Seawater altitude observations
The height of the seawater in relation to the theoretical mean water and in the N2000 altitude system from the 14 measuring stations on the Finnish coast, i.e. the mareographer. Since 1971, every hour and every minute after 2017.
Trust score
How is this computed?Composite of 5 axes from our methodology (proof-based officialness, live verification, metadata completeness, license clarity, agent readiness).
- Officialnessweight 25%50/100
Not public-sector → neutral score; not subject to the proof checker.
- Availabilityweight 25%100/100
Latest verification succeeded.
- Metadata completenessweight 20%40/100
4 of 10 recommended metadata fields populated.
- License clarityweight 15%50/100
License info not yet tracked for APIs (datasets only).
- Agent readinessweight 15%10/100
Topic tags assigned
Data access
A queryable map-feature service. Its attribute schema couldn't be read automatically — query the service endpoint directly to inspect its fields.
Verification Status
Using the API
Configuration
- Base URL
- https://opendata.fmi.fi/wfs?request=GetFeature&storedquery_id=fmi%3A%3Aobservations%3A%3Amareograph%3A%3Ainstant%3A%3Amultipointcoverage
Query examples
curl -s 'https://opendata.fmi.fi/wfs?request=GetFeature&storedquery_id=fmi%3A%3Aobservations%3A%3Amareograph%3A%3Ainstant%3A%3Amultipointcoverage&service=WFS&version=2.0.0' -H 'Accept: application/json'List the feature types (layers) and supported operations.