A Spatial Data Catalog based Initiative to launch the Spain SDI

1. A Spatial Data Catalog based Initiative to launch the Spain SDI M.A. Bernabé1, M.Gould2, C. Granell2, P.R.Muro-Medrano3, J.Nogueras3, F.J.Zarazaga3 Politechnic University of Madrid University Jaume I, Castellón University of Zaragoza GSDI-6 Budapest

2. Tecnologías para Infraestructuras de Datos Espaciales • Consortium of researchers @ 3 universities • Involved in 4 SDI projects • 2 regional, 1 national + INSPIRE • Active OpenGIS members • Technologists, interested in open SDI, not single-vendor solutions GSDI-6 Budapest

3. Reverse engineering • The process of analysing an existing system to identify its components and their interrelationships and create representations of the system in another form or at a higher level of abstraction. (www.dictionary.com) GSDI-6 Budapest

4. Reverse engineering (2) • Respectable name for copying other peoples’ work. • For learning from others’ mistakes. • Where to look: Norwegian pilot, NRW, FGDC, OS (DNF), ESMI, OGC testbeds, INSPIRE... GSDI-6 Budapest

5. Our objective • Contribute to the successful development of SDIs • Regional SDIs • National SDIs • European/Global SDIs Also: students learn by doing and extending GSDI-6 Budapest

6. Our methodology • Create working prototypes of SDI components • Demonstrate to politicians • Using their own data • Hope they ask for more • Hope they are inspired to create a reference model, for SDI sustainability GSDI-6 Budapest

7. Cart before the horse? • SDIs are driven by politics • Based on agreements, standards, cooperation, sharing, politics of public sector data access • Based on a conceptual architecture or model • Technology is merely a facilitator… • Proper development should not start with technology, rather with needs-based model GSDI-6 Budapest

8. Reality • Politicians need help to decide how to begin • Huge investments, and savings, at stake • Many cannot imagine what SDI look like • In such a case it is impossible to expect a reference model be proposed • Our experience shows that technology demonstrations can provide the political spark GSDI-6 Budapest

9. Confusion • Many SDI options available • Standards (at times competing) • Reference data • Access: Metadata and Catalogs • User Services • Many SDIs already partially implemented • How to turn back, restart, migrate? GSDI-6 Budapest

10. SDI technology: complicated GSDI-6 Budapest

11. SDI technology: simplified GSDI-6 Budapest Source: NASA, 2001

12. Access: Metadata • FGDC, CEN, Dublin Core, ISO... • Competing formats no longer an issue • ISO 19115 (DIS) is available, if you try • National liaisons (NMAs); OGC liaison • Vendors are implementing it; why aren’t you? • National/regional profiles of 19115 encouraged! • Dublin Core easily added GSDI-6 Budapest

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18. Access: Catalogs • Older SDIs utilised z39.50-based digital library technology (FGDC Isite, etc.) • More recently, OGC Catalog Service 1.0 • Several implementations (incl z39.50), 1 conformant • A draft 1.1 document is pending, to be completed soon • Rumours of advanced, web services-based “stateless catalog” specification in the works • This will happen, but DO NOT wait for them • SDIs must implement OGC Catalog Spec 1.0 now. “The Cookbook authors recommend that organisations publish their metadata using OpenGIS Consortium Catalog Services Specification.” GSDI Cookbook, 2000 GSDI-6 Budapest

19. Data Holdings Coverage areas Map Projection Formats Cost/Policies Interoperable Web Mapping Server 1 Data Holdings Coverage areas Map Projection Formats Cost/Policies Server 2 Data Holdings Coverage areas Map Projection Formats Cost/Policies CatalogService Server 3 GSDI-6 Budapest Source: Digital Earth, NASA

20. Viewer Client: Combined Map Interoperable Web Mapping Server 1 Server 1: Topography Topography? Water? Boundaries? Server 2 Server 2: Water CatalogService Server 3 Server 3: Boundaries GSDI-6 Budapest Source: Digital Earth, NASA

21. OGC Catalog Service 1.1 (draft) GSDI-6 Budapest

22. Commercial products coming... GSDI-6 Budapest

23. User services • Was previously termed “web mapping” • But services are now much more diverse • Feature service • Coverage service • Terrain Server • Sensor collection service • Just a few examples emerging from OWS-1 GSDI-6 Budapest

24. Common Architecture Clients Perspective Client (Web Mapping) Web-based Imagery Exploitation Client Sensor Web Enablement Client Decision Support Client OGC Services Model Web/Portal Services OGC Encodings -GML -LOF -XIMA 1st Tier Applications Web Mapping (Server-side) Web-based Imagery Exploitation (Server-side) Sensor Web Enablement (Server-side) Decision Support (Server-side) -SensorML -ModelingML -Situation Objects Application Services Web Registry Services Change Detection Triangu-lation Ortho Produc-tion Image Catalog Image Archive Image Section Retrival Image Mosaic Image Coord Trans Sensor Registry Sensor Collection Sensor Tasking Sensor Geolocation Collection Access Gen. Post Collection Predictor Tracking Security Event Registries Work-flow Mgr Model Builder-Editor Symbol Manage-ment SLD XSLT Transla-tors Coord Trans Sensor Web Enablement Web-based Imagery Exploitation Data Services Web Mapping Web Map Server Web Feature Server Web Coverage Server Decision Support GSDI-6 Budapest Decision Support

25. The Future • Huge constellation of Web Services, creating the (geo)Semantic Web • Much to do in semantic interoperability: web services need to communicate seamlessly to create service chains • But let’s not get ahead of ourselves • First we need to provide users with basic access to Geographic Reference Data • Standards, technologies and experiences exist • INSPIRE provides the background political push GSDI-6 Budapest

26. Thanks for your attention. Contact: gould@uji.es GSDI-6 Budapest