1 Univ. of Crete & ICS-FORTH NIT’98, Athens, Greece THETIS: A Data Management and Data Visualization system for supporting Coastal Zone Management (CZM)

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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 -

HellasComputer Science Dept. Univ. Of Crete

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THETIS: The Project

Objectives: Integrate heterogeneous scientific repositories for CZM into an

interoperable system for transparent access via the Web Index/Search and Querying of heterogeneous repositories

Files, images, documents, text, audio Scientific programs (simulation models, image/data processing

algorithms) Visualization via GIS and scientific tools User groups scientists and public authorities

Consortium: 9 Partners: university, research institutions , IT companies

Duration: 21/2 years, 1998-2001 First Prototype available online in four countries UK, FR, IT, GR

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THETIS: The Environment

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THETIS: Design Considerations

Index/Search: use of Dienst (DL search engine) Discover resources (keywords, geographic location, time, by name) Management of Metadata (FGDC standard, varying #of search fields) Distributed Indexing/Search (strings(multilingual),numbers)

Querying:use of Le Select (DB Integration engine) Mediation (data files, image database,documents,programs)

JDBC access Data Transformations, integration and manipulation

SQL queries Wrapping of repositories

Light Weight Workflow: Interactive (via index)

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THETIS: The Architecture

Web ClientWeb Client Web ServerWeb Server

Session ManagerSession ManagerAppletsAppletsAppletsApplets

Le SelectLe Select DienstDienstMetadataMetadata

Data Programs Documents

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Dienst: the index/search engine

Distributed Architecture Repository Service Index Service UI Service Meta Service

WWW Client Interface

HTTP both for client-server & server-server communication

UI serverRepository

server

HTTP

clientsclients

Index server

Dienst Server

DS

DS

DS

other Dienst servers

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Dienst: the index/search engine (cont.)

Monitoring tools flow monitor performance monitor monitoring other dienst servers

Metadata (FGDC, content, geographical location, time) parameterized input

determination of collection objects determination of search, browse, index fields workflow information (interactive, rule based) pricing mechanism (repository service, QoS, system congestion)

User Interface web access GIS access (thematic maps, animation)

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Search Form

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Data Search Form

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Program Search Form

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Result Form

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Object Overview Form

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THETIS: Demonstration Scenarios

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THETIS: Demonstration Scenarios

Waste circulation management in the coastal area north of Heraklion

Wave data and fisheries management in coastal areas north of Heraklion

Extraction of coastal data from satellite images