EOProduct Extrinsic Object EOAquisitionPlatform Extrinsic Object

Open Geospatial Consortium OGC 10-189r2 28 Copyright © 2012 Open Geospatial Consortium

8.2.1 EOProduct Extrinsic Object

In the ebRIM model, the EO Product is represented by an ExtrinsicObject with the objectType parameter equal to “urn:ogc:def:objectType:OGC-CSW-ebRIM- EO:2.0:EOProduct”. This ExtrinsicObject is the main object of the Earth Observation Product model. It contains a set of attributes that characterize directly the product. A set of thematic product types extend the standard EO Product type with specific information. There are 6 thematic product types: - OPT : Optical products - SAR : Synthetic Aperture Radar products - ATM : Atmospheric products - ALT: Altimetry products - LMB: Limb Looking products - SSP: Synthesis and Systematic products. Each thematic product type defines some additional slots to the main EO Product ExtrinsicObject. This model can be extended with new thematic or mission specific profiles like for instance done for the Pleiades mission. The original metadata file the OM file is linked to the main ExtrinsicObject as content this is the related RepositoryItem. This can be done either internally if the Catalogue is also a repository the OM file is stored in the Catalogue, or externally if the Catalogue is only a registry the OM file is linked, or generated from available up-to-date metadata. These implementation details are further discussed in Annex E: . The EO Product identifier is mapped to an ExternalIdentifier linked to this ExtrinsicObject, as shown in Figure 4

8.2.2 EOAquisitionPlatform Extrinsic Object

The additional information about the Acquisition Platform is linked to the main EO Product ExtrinsicObject. This additional metadata is stored into a specific ExtrinsicObject, linked to the main one using an Association. Implementations claiming conformance to this specification shall implement the association and slots defined in this section. The Acquisition Platform parameters i.e., Platform, Instrument and Sensor are stored in an ExtrinsicObject having the objectType attribute set to ‘urn:ogc:def:objectType:OGC-CSW-ebRIM-EO:2.0:EOAcquisitionPlatform’. It is linked to the main ExtrinsicObject through an Association object, with the associationType attribute equals to ‘urn:ogc:def:associationType:OGC-CSW-ebRIM- EO:2.0:AcquiredBy’. OGC 10-189r2 Open Geospatial Consortium Copyright © 2012 Open Geospatial Consortium 29 An Acquisition Platform metadata set may be common to multiple acquisitions, defining therefore a 1:n association from the EO Acquisition Platform ExtrinsicObject to the matching EO Product ExtrinsicObject. Such information ensures EO Products search by acquisition platform.

8.2.3 Grouping the objects into a Registry Package