NOAA CO-OPS Tides and Currents Data API and Metadata API (water levels, Great Lakes stations)
Credit: NOAA National Ocean Service, CO-OPS. The source, its terms.
Public domain, US government work: "The information on government servers are in the public domain, unless specifically annotated otherwise, and may be used freely by the public." Credit: "NOS requests that attribution be given whenever NOS material is reproduced and re-disseminated." (NOAA National Ocean Service, CO-OPS)
Licence: Public domain, a work of the US federal government. Terms read on .