Web Content Display

SEXTANT-OI: a multi-partners and multi-projects infrastructure

Sextant "Indian Ocean" is fully interoperable with large geographic information portals, which facilitates exchanges with numerous organisms and State services (DEAL, DMSOI, ...), with numerous scientific partners (IRD, MNHN, University of  La Réunion), with the managers of the marine realms (AAMP, RNMR, TAAF) or with the national producers such as the IGN, SHOM and BRGM.

Site administrator, data provider

Initiated and administered by the Indian Ocean Ifremer Delegation, the portal Sextant "Indian Ocean" is aimed at facilitating data exchanges and mutualisation between producers, providers and users of marine geographic data at the scale of french territories in the Indian Ocean.  

Data available on Sextant are organized and grouped in "thematic catalogs". Every catalog is attached to a project (Tortues-TORSOOI, POLMAR, GIML, ...), a team or a grouip of partners (REMATA, Délégation Océan Indien) or to a structure (RNMR, Globice, ...). The list of the different thematic catalogs covering the Indian Ocean are displayed in the onglet "Catalogues Thématiques".

Few catalogs have their own Web site Sextant (REMATA, POLMAR...). The goal of these thematic Sextant web sites is to give supports to data thanks to personnalised editorial pages and to operational cartographic projects. The URL from these thematic portals are displayed at the bottom of the concerned page.

Secure resources

There is a particularity in the Sextant infrastructure: there is a distinction between a centralised administration of the system (informatic resources, secure network, web application...) and a decentralised administration of metadata and data which is of the producers responsibility.  

The securisation of data and the control of the access are a fundamental component of Sextant. Every rightholder (producer, provider, owner, ...) can define the level of access for its data. 

He has then 3 levels of access from the metada to the data:

  • LEVEL I (Catalogue): Only the metadata is available via the catalog (the data cannot be viewed and cannot be downloaded).
  • LEVEL II (Geoviewer): Level I + the data can be viewed in the geoviewver (but cannot be downloaded).
  • LEVEL III (Basket): Level II + the data can be downloaded (conditions are determined by the data owner).

In addition to these 3 levels of access, theres is a higher level of confidentiality depending on the degree of diffusion and visibility that the owner wishes to give. Therefore, the 3 levels of access may be:

  • restricted to identified users (login) for a thematic catalogue (the diffusion is restricted), 
  • or applicable to every user without identification.

In addition, the data administrator who decides to not restrict the access to its information (minimal public statut of metadata) effectively rendering moissonnable its metadata through the national Géocatalogue, which ensures a large diffusion at a high European level via the portal INSPIRE. Simply banking a data in SEXTANT ensures compliance with the european directive INSPIRE