THETIS: A Data Management and Data Visualization system for supporting Coastal Zone Management CZM o

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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
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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)
• Queryinguse of Le Select (DB Integration
  engine)
• Mediation (data files, image database,documents,pr
  ograms)
• 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 Client
Web Server
Session Manager
Applets
Applets
Le Select
Dienst
Metadata
Programs
Documents
Data
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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

clients
DS
HTTP
DS
UI server
Repository server
DS
Index server
Dienst Server
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