Kartverket Tide and Water Level API

Kartverket Tide and Water Level API

The Norwegian Mapping Authority’s hydrographic service (Kartverket) publishes a keyless tide and water-level API: "The API is open for everybody, free of charge." Data covers observations, predictions and high/low tides by station or position, as XML.

Coverage

Data types offered: observations, predictions, high and low; interval 10 or 60 minutes; reference levels chart datum, mean sea level or NN2000. History start and update frequency: Not stated.

Verdict

Norwegian tide predictions, observed water levels, high/low tides and station levels by position or station, as XML via a keyless API. Licensed CC-BY-4.0: "The use of the data is licensed through Creative Commons Attribution 4.0 international (CC BY 4.0) ."; the terms page adds "The Norwegian Mapping Authority’s free products are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) ." and requires the name Kartverket to appear wherever the data is used, in the form "©Kartverket". Rate guidance: "The API should be able to handle about 20 requests per second, but remember that you share this resource with all other users." Signal Lab links only.