Digital data of maritime boundaries disseminated on the portal are derived from Shom calculations or digitisation of maritime boundary agreements or the decisions of international legal bodies. They are only disseminated when these elements enter into force in French legislation. This digital data is then used to update the French maritime boundaries shown on Shom nautical charts. Digital data and the nautical charts therefore represent the same information on maritime boundaries.
In any case, when elements enter into force on new maritime boundaries, the update time required for nautical charts is longer than for the digital product. During this time, the information shown on the updated digital product and on current nautical charts may differ. Once all updates to nautical documents and data are effective, there will no longer be a difference.
Thanks to this license, users can operate the data without paying fees subject to a Share-Alike license. As soon as the data is integrated in a derivative work that is shared, this must be freely shared under the same CC-BY-SA 4.0 license.
All data available on the site is free: SHP, FLUX, PDF maps.
Directive INSPIRE (2007/2/CE) of 14 May 2007, developed by the Directorate-General for Environment of the European Commission, aims to establish in Europe a geographical-data infrastructure to insure interoperability between databases and to facilitate broadcast, availability, use and reuse of geographical information in Europe. Directive INSPIRE applies to digital geographical data owned by public authorities. It does not require to collect new data, but to make existing data available in compliance with consistent technical standards. In order to conform to the directive requirements, Shom has implemented a platform to broadcast reference coastal and marine geographical information. This platform data.shom.fr is reachable from the page Interactive chart of the portal limitesmaritimes.gouv.fr.