1 THETIS:A DATA MANAGEMENT AND DATA VISUALIZATION SYSTEM FOR SUPPORTING COASTAL ZONE MANAGEMENT OF THE MEDITERRANEAN SEA (F0069: Telematics on Research) Hariklia Tsalapata (ICS-FORTH)

2 A Data Management and Data Visualization System for supporting Coastal Zone Management of the Mediterranean Sea CONSORTIUM ERCIM ICS-FORTH IACM-FORTH INRIA HR-WALLINGFORD IMBC ALCATEL CNR RECORMED

3 Information Management & CZM Importance of Information Management in CZM –MAP, OECD, Info-Coast, MUSEC Heterogeneity –w.r.t. content, storage format, classification Scale and Data Availability –within a single organisation or group of collaborating institutions, data are kept in separate locations, but it is desirable to have a single point of access Remote Execution –information can often be computed using simulation models that run on (specialised) hardware installed at remote locations Open-ended Information Processing –data may go through several processing steps to create information products that are of interest to different user groups (scientists, authorities, citizens)

4 Objectives Vision: –Information management in CZM is promoted through an open, federated system that facilitates resource sharing while maintaining operational autonomy for its members Objective: design & implement a system that provides –On-line access using WWW technology –Straightforward plug-in / publishing capability both for models and data sets –Efficient search for data and models via appropriate metadata descriptions and a distributed search engine –Flexible data integration using mediation techniques –Dynamic invocation of models to produce data on demand –Interactive data visualisation using GIS technology

5 Design: Locating Data and Models Metadata set – The THETIS metadata relies on the FGDC standard Extensions and refinements – are considered during development, as data and models are added to the system Legacy sources –are incorporated using metadata descriptions for their data/models Data and models can be published –Publication of new data and models can occur anytime; system indices are updated incrementally and with no human intervention Metadata search requests –can be submitted to any server of the system from any location connected to the Internet

6 Design: Data Integration & Processing Wrappers –Data and models are plugged into the system using special software adapters called wrappers that export a relational view of data, independently of the actual underlying storage technology (e.g. files, DB). Model wrappers export an interface through which simulation programs can be invoked remotely Data views –are built interactively by combining data sources Computed data –are generated on demand by combining data sources and models Both views and computed data can be published in the system just like ordinary data in order to be made available to others

7 Architecture (Overview) data sets model wrapper Retrieval Engine Search Engine accesspublish metadata search WWW Interface SQL-like query results content Server Node Provider

8 get metadata description get model interface Interface (tentative) request data visualization find objects of interest compute & store new data

9 Demonstration Scenaria Waste Transport: –for the simulation of pollution point sources –Computation of general circulation data –Computation of the concentration of effluents based on general circulation data –Visualisation of the transport of pollutants Tracking of Sea Structures: –for the study of the dynamic of oceans –Extraction of oceanographic structures from satellite images through stepwise image processing Nearshore and Offshore Waves: –for coastal defences, coastal and offshore structures, flood prevention, etc. –Calculation of the wave climate based on historical wind and wave data –Estimation of directional (2D) spectra of surface waves based on heave-pitch- roll time series

10 Conclusions Architecture for the location, integration, and visualisation of scientific information –THETIS is tailored for CZM –The architecture can be applied to other environmental information management systems The system is currently under development

11 Dataflow Descriptions (example) Bathymetry (incl. Coastline) Velocity Field & Elevation 2-D Circulation Model WADIS Model - Pollution Source - Time Step Concentration of Pollutant in Time Data Sets Models User Input Condition - Wind Direction - Wind Velocity