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“Exploiting the integration potential of Semantic Web and Linked Data technologies for geospatial
applications”
TELEIOS Workshop at the INSPIRE Conference, 23-27th June 2013, Florence
Presenters: Eva Klien (Fraunhofer IGD), Giorgios Garbis (NKUA), Kallirroi Dogani (NKUA)
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Workshop Outline
• Introduction to TELEIOS + Focus of the Workshop
• stSPARQL + STRABON: Semantic Web and Linked Data technologies exploited for geospatial applications + Demo (Giorgos Garbis, Kallirroi Dogani, NKUA)
• Visual Query Builder + Demo (Eva Klien, Fraunhofer IGD)
• Discussion and Brainstorming with the participants on how the shown technologies can be of use in their INSPIRE applications
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TELEIOS: Virtual Observatory Infrastructure for Earth Observation Data
• A STREP project funded under the 5th call of FP7/ICT under the Strategic Objective ICT 2009.4.3 “Intelligent Information Management”.
• Emphasis of this objective was on “scalability” and
“systematic empirical testing” of systems for “very large amounts of data” (i.e., big data).
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Consortium
1. National and Kapodistrian University of Athens
2. Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
3. Deutsches Zentrum für Luft- und Raumfahrt e.V.
4. Centrum Wiskunde & Informatica
5. National Observatory of Athens
6. Advanced Computer Systems
With support from
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Motivation
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Motivation (cont’d)
~20 PB
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Motivation (cont’d)
Damage Assessment Earthquake Haiti, 2010
Estimated directly affected inhabitants Japan, Honshu 2011
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Catalogue
Processing Chains
PDGS
Archive
State of the Art in EO Data Centers
Raw Data
Users
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Example
• Can I pose the following query using EOWEB?
Find images taken by the MSG2 satellite on August 25, 2007 which contain fire hotspots in areas which have been classified as forests according to CORINE land cover, and are located within 2km from an archaeological site in the Peloponnese.
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Example (cont’d)
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Example (cont’d)
• Well, only partially. Find images taken by the MSG2
satellite on August 25, 2007 which contain fire hotspots in areas which have been classified as forests according to CORINE land cover, and are located within 2km from an archaeological site in the Peloponnese.
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Example (cont’d)
• But why?
• All this information is available in the satellite images and other auxiliary data sources of EO data centers or on the Web.
• However, EO data centers today do not allow: • the mining of satellite image content
and • its integration with other relevant
data sources so the previous query can be answered.
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Linked Geospatial
Data Semantic
Annotations Ontologies Knowledge Discovery and Data Mining
Raw Data Ingestion Archiving
Cataloguing Processing
Content Extraction
GIS Data Derived Products Metadata
Web Portals
Rapid Mapping
Scie
ntifi
c D
atab
ase
and
Sem
antic
Web
Tec
hnol
ogie
s The TELEIOS Earth Observatory: Concept View
DATA
KNOWL- EDGE
Features
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TELEIOS Use Cases
• DLR Use Case: • A Virtual Observatory for
TerraSAR-X data
• NOA Use Case: • Real-time fire monitoring based
on continuous acquisitions of EO images and geospatial data.
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What will be shown in the Workshop?
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Technical Contributions
• Semantic annotations capturing the knowledge discovered: the model stRDF, the query language stSPARQL and their implementation in the system Strabon.
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Technical Contributions
• Helping users to formulate stSPARQL queries: a visual query builder.
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Workshop Goals
• Demonstrate the capabilities of Semantic Web and Linked Data technologies in geosptial applications
• Receive feedback on the applications developed in TELEIOS
• Discuss applicability and requirements from the INSPIRE Community
Please fill out the Questionnaires
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Hands-on exercise
• TELEIOS online system for FIRE Monitoring Application is accessible on:
http://teleios.space.noa.gr
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• Login, Script, User Guide and Questionnaire are provided during the Workshop
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