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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