1. 1 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: A Data Management and Data Visualization system for supporting Coastal Zone Management (CZM) of the Mediterranean Sea Catherine Houstis Institute of Computer Science Foundation for Research and Technology - Hellas Computer Science Dept. Univ. Of Crete

2. 2 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: The Project l Objectives: u Integrate heterogeneous scientific repositories for CZM into an interoperable system for transparent access via the Web u Index/Search and Querying of heterogeneous repositories  Files, images, documents, text, audio  Scientific programs (simulation models, image/data processing algorithms) u Visualization via GIS and scientific tools u User groups scientists and public authorities l Consortium: u 9 Partners: university, research institutions, IT companies l Duration: 2 1/2 years, 1998-2001 u First Prototype available online in four countries UK, FR, IT, GR

3. 3 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: The Environment

4. 4 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: Design Considerations l Index/Search: use of Dienst (DL search engine) u Discover resources (keywords, geographic location, time, by name) u Management of Metadata (FGDC standard, varying #of search fields) u Distributed Indexing/Search ( strings(multilingual),numbers ) l Querying:use of Le Select (DB Integration engine) u Mediation (data files, image database,documents,programs)  JDBC access  Data Transformations, integration and manipulation u SQL queries u Wrapping of repositories l Light Weight Workflow: Interactive (via index)

5. 5 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: The Architecture Web Client Web Server Session Manager Applets Le Select Dienst Metadata Data Programs Documents

6. 6 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece Dienst: the index/search engine l Distributed Architecture u Repository Service u Index Service u UI Service u Meta Service l WWW Client Interface l HTTP both for client- server & server-server communication UI server Repository server HTTP clients Index server Dienst Server DS other Dienst servers

7. 7 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece Dienst: the index/search engine (cont.) l Monitoring tools u flow monitor u performance monitor u monitoring other dienst servers l Metadata ( FGDC, content, geographical location, time) l parameterized input u determination of collection objects u determination of search, browse, index fields u workflow information (interactive, rule based) u pricing mechanism (repository service, QoS, system congestion) l User Interface u web access u GIS access (thematic maps, animation)

8. 8 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece Search Form

9. 9 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece Data Search Form

10. 10 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece Program Search Form

11. 11 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece Result Form

12. 12 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece Object Overview Form

13. 13 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: Demonstration Scenarios

14. 14 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: Demonstration Scenarios l Waste circulation management in the coastal area north of Heraklion l Wave data and fisheries management in coastal areas north of Heraklion l Extraction of coastal data from satellite images