Microproduct Data GuideIntermediate

SYKE Hydrology Water Levels

Finnish environmental OData water-level measurements for station-based hydrology monitoring and comparison across basins.

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At a Glance

Difficulty
Intermediate — some data preparation helps
Size
Tiny · ≤0.01 GB
Formats
JSON
Access
API
API Key
Not Required
Provider
Finnish Environment Institute
Updates
Near Real Time
Last Verified
Sep 28, 2026
Source Type
Government Source
Data Terms
Finnish Environment Institute open data are CC BY 4.0; name SYKE and the hydrology dataset when reusing values.
  • Python Syntax Checked

From Source to Product Signal

Test a Product Idea in Four Steps

SYKE's Hydrologiarajapinta OData service exposes Vedenkorkeus water-level observations and separate datum metadata. Start with one recent value; a level cannot be compared across stations without reference-system and quality checks.

1

Check the Setup

  • Python 3.10 or newer
  • An internet connection
  • The requests Python package
2

Access the Data

  1. 1.Review the SYKE hydrology OData entities and CC BY licence.
  2. 2.Request one latest Vedenkorkeus row.
  3. 3.Keep its place ID, timestamp, value, and quality flag for later station-metadata lookup.
Open Official Source
3

Run the Python Example

Install the packages, then run the notebook cell.

python -m pip install requests

import requests

response = requests.get(
    "https://rajapinnat.ymparisto.fi/api/Hydrologiarajapinta/1.2/odata/Vedenkorkeus",
    params={"$top": 1, "$orderby": "Aika desc"},
    headers={"Accept": "application/json"}, timeout=25,
)
response.raise_for_status()
for row in response.json()["value"]:
    print(row["Paikka_Id"], row["Aika"], row["Arvo"], row["Lippu_id"])
4

Test a Useful Signal

Inspect One Finnish Water Level

Display one dated OData measurement with its station and quality identifiers.

  1. 01Fetch one recent Vedenkorkeus record.
  2. 02Show its place ID, date, value, and quality-flag ID.
  3. 03Explain that a datum lookup is needed before cross-station comparison.

Related Datasets

Dataset Details

Finnish Environment Institute is a government source. Last verified 2026-09-28. Temporal coverage: observed Finnish station water levels and historical records.

Data Types

Time Series

Geography

Finland

Formats

JSON

Provider

Finnish Environment Institute

Data Terms

Finnish Environment Institute open data are CC BY 4.0; name SYKE and the hydrology dataset when reusing values.

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