Collection and Service Discovery Service

Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved. 41 o An NGI Belgium catalogue NSI project. Figure 15 : ESA collection discovery from GeoNetwork. The document-style SOAP bindings of the CSW to discover service and dataset collection metadata using the CSW ISO Profile was initially used. However, the Cataloguing of ISO MetadataCIM using the ebRIM profile of CSW was adopted to ensure coherence across the supported protocol stacks. A collection discovery service according to this specification was provided by both IONIC and EUMETSAT according to this specification. Also the integration of the three GEO Clearinghouse candidates was tested. Three Clearinghouse Candidates are currently being considered which allow for allow for service and collection discovery:  Geonetwork Clearinghouse Candidate 1.  Compusult Clearinghouse Candidate 2.  ESRI Clearinghouse Candidate 3. For cross-platform testing GEO hopes to see that each of the GEO Web Portal candidates can demonstrate use of their integrated clients to query all three of the following instances of the GEOSS Clearinghouse: 42 Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved.  GeoNetwork Clearinghouse Candidate: http:65.123.203.156:9090GeoNetworkClearinghousediscovery?Service=CSW Request=GetCapabilities  Compusult Clearinghouse Candidate: http:gaia.compusult.netwesserviceManagerCSWcsw?request=GetCapabilities  ESRI Clearinghouse Candidate: http:keel.esri.comcatalogcsw202?Service=CSWRequest=GetCapabilities The GEO Geonetwork Clearinghouse Candidate supports OGC CSW 2.0.2 HTTP bindings was successfully integrated as shown below. The main problems experienced were problems with default namespaces, invalid character sets and the fact the clearinghouse was not deployed on port 80. Figure 16: Collection and service discovery via GEO Clearinghouse GeoNetwork The GEO Compusult Clearinghouse Candidate supports OGC CSW 2.0.2 HTTP bindings and CSW ebRIM Application Profile was partly integrated as shown below. The main remaining problem is the MIME type returned by the catalogue. The official Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved. 43 OGC position in the CSW 2.0.2 specification OGC 07-006 is that the catalogue should support applicationxml. The Oracle BPEL Process manager 10.1.3 used as catalogue client currently does not support this MIME type. SPACEBEL has developed a workaround to cope with the MIME problem and the Compusult Clearinghouse Candidate has now successfully been integrated. Figure 17: Collection and service discovery via GEO Clearinghouse Compusult. 44 Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved. Figure 18: GEOSS Clearinghouse Compusult GetRecordsByID. The third GEO Clearinghouse Candidate ESRI supports OGC CSW 2.0.2. It could not be integrated as it does not return a MIME type in its GetRecords response but SPACEBEL managed to integrate it successfully.

11.4 Service Discovery Services

The FedEO Clearinghouse supports service discovery via Universal Description, Discovery and Integration – UDDI from OASIS population of an instance of the UDDI is core of the registration of new services within the FedEO Clearinghouse built on SSE technilogy. Figure 19 : Discovering Services via UDDI. Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved. 45

11.5 Catalogue Service

The ebRIM Application Profile of CSW has been selected for the « dataset » product catalogue service. It is an OGC CSW Application Profile that is also in use outside of the specific EO domain. This strategy is in-line with the recent OGC decision to recommend the use of the ebRIM model as information model for future catalogue specifications. The ebRIM information model for EO data is defined in the EO extension package for ebRIM Profile of CSW2.0. The following catalogues are currently accessible from the Clearinghouse via this protocol: o ESA MUIS, o Spot Image Dali, o Eumetsat UMARF, o NASA ECHO as a prototype, o EC FP6 WIN catalogue demonstrated in April 2007. The ebRIM information model for EO data is defined in the EO extension package for ebRIM Profile of CSW 2.0 has also been extended by CNES to support the International Charter ―Space and Major Disasters‖, and is currently being tested within the FedEO Clearinghouse. In CSW EO extension package for ebRIM as well as in the CSW EO Application Profile the metadata are specified as a GML application schema defined within OGC 06- 080. Figure 20 : Access to ESA MUIS catalogue.