KNMI Data Platform (Royal Netherlands Meteorological Institute)

KNMI Data Platform (Royal Netherlands Meteorological Institute)

The KNMI Data Platform's Open Data API, Notification Service and EDR API serve Dutch meteorological datasets. KNMI's developer docs say: "All endpoints are protected and can be accessed using a valid API key, passed in the Authorization header of the HTTP request." KNMI offers a registered key plus a shared "Anonymous open data API key" that "provides unregistered access to open data and is shared among all unregistered users"; a key, registered or anonymous, is required either way.

Coverage

Licence and coverage are set per dataset on the platform. For example, the in-situ surface observations listing shows: "Data format: NetCDF Dataset period: 2012-01-01 to present License: CC-BY-4.0 APIs: Open Data API Notification Service EDR API". Published Open Data API rate limits and quotas: registered key 200 requests/second and 1000 requests/hour; anonymous key 50 requests/minute (shared) and 3000 requests/hour (shared); dataset bulk key 100 requests/second, quota is the amount of files per dataset.

Verdict

A Dutch meteorological data platform where every call needs an API key, either a registered key or KNMI's shared anonymous key, and licence terms are shown per dataset rather than as one blanket licence; many datasets use CC BY 4.0 but each dataset's own listing should be checked. Signal Lab links only.