History and missions of sextant
In 1999, in order to cover its own needs, Ifremer developed an infrastructure on marine and coastal geographical data, Sextant. Since 2006, Sextant is accessible via internet and is then available for all Ifremer's partners and the general public. Since 2008, Sextant has evolved several times and these evolutions have always been made in the context of the INSPIRE Directive.
Sextant aims to collect and make available a catalog of reference data, in relation with the marine environment. Therefore, Sextant gives supports to environmental problems, such as biodiversity, sustainable energies at sea, integrated managment of coastal zones, fishery, deep sea environments and the exploration and exploitation of the sea.
This approach is at the heart of the implementation of the Grenelle de la Mer, and of its declension in the Green Paper «Connaissance du milieu marin 2020» from the European Comission.
Metadata, data and services interoperability
Sexant meets the needs of ISO (International Organization for Standardization) international standards and Open Geospatial Consortium (OGC). Sextant is also interoperable with the large geographic information portals. The data and metadata of these portals are therefore accessible from Sextant, and, reciprocally, exchanges protocols named "interoperable services" that enables displaying the data present on Sextant on other portals.
Few examples: (more detail in "Other Portals")
services to data
Sextant is a system proposing a metadata catalog service, a viewer and downloading service of data.
Catalogue: Searching data
- A catalogue meeting the needs of ISO International Standards and CSW (Catalogue Services for the Web) protocol of the Open Geospatial Consortium (OGC)
Geoviewer: Visualising data
- A display of data via the WMS (Web Map Service) protocol of the OGC
Basket: Downloading data
- Available data through WFS (Web Feature Service) and WCS (Web Coverage Service) protocols of the OGC
You should start by exploring the metadata catalogue, and then view and/or download the data.
The access to the data is directly managed by the data producer who decides alone the levels of accessibility.