Maritime Altimetric References

Other

In accordance with decree no. n°2019-165 of 5 March 2019, Shom measures and updates maritime altimetric datums or hydrographic datums for French ports in mainland France and overseas administrative departments and authorities. These datums are provided to allow for standardisation based on legal altimetric datum systems (e.g. IGN69). Shom also disseminates typical tide figures for each port (lowest tide, mean tide, etc.). The Marine Altimetric Reference Value (RAM) product is available for ports in mainland France and for overseas territories with a tidal observatory.

Data and resources

Portail d'information géographique du Shom

Portail d'information géographique du Shom

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RAM_BDD_WLD_WGS84G_WMS

Access point / Références Altimétriques Marines WMS

WMS Open
RAM_BDD_WLD_WGS84G_WFS:ram_3857

Access point Références Altimétriques Marines WFS

WFS Open
Service de téléchargement du produit complet

HTML Open
Espace de diffusion du Shom

Espace de diffusion du Shom

HTML Open

Additional information

Date (creation)	2007-01-01
Date (revision)	2024-06-06
Status	onGoing
Update frequency	asNeeded
Metadata language	fr
License	Utilisation libre sous réserve de citer les sources de la manière suivante : "Shom, 2025. Références Altimétriques Maritimes, https://dx.doi.org/10.17183/MAREE_COURANTS_RAM"
Source metadata	ISO 19115 XML
Last updated	2026-11-04
Created	2026-11-04
API	package_show