Journˇe Reasoning on Data (RoD – GDR IA et MaDICS)

Jeudi 4 octobre 2018,  Paris

 

Lieu : LIP6 (4 place Jussieu, tour 26) - salle Gˇrard Noguez (couloir 26--00 salle 101)

 

 

Tutoriel invitˇ : Representation, Querying and Visualisation of Linked Geospatial Data

 

par Konstantina Bereta et George Stamoulis (National and Kapodistrian University of Athens)

 

Aper¨u

 

The amount of linked geospatial data in the Web of data is increasing rapidly as data from various geospatial data sources is available as RDF and added to the linked data cloud (e.g., Geonames, Open Street Map, CORINE land cover etc.). Therefore, it is important to study how to represent geospatial data in RDF and how to query it using SPARQL. Researchers from the areas of Semantic Web and Linked Data have studied theses problems recently. The results of this research has been the development of geospatial extensions of RDF and SPARQL, and the implementation of geospatial RDF stores.

 

 Soon after the establishment of GeoSPARQL, a geospatial extension of the query language SPARQL which became an OGC standard, many geospatial triple stores emerged. Recent research efforts focused in extending the Ontology-based Data Access paradigm (OBDA) with geospatial support. Geospatial OBDA systems enable users to pose GeoSPARQL queries on top of existing geospatial databases without converting the data and materialising it as RDF triples. Given ontologies and mappings as input, OBDA systems translate GeoSPARQL queries into SQL queries which are evaluated by the underlying geospatial DBMS.

 

 Another important topic is the exploration and visualisation of linked geospatial data from different sources. In this tutorial, we present a comparative survey of current research in this area and point to directions for future work.

 

Bios

 

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Konstantina Bereta is a researcher at the Management of Data, Information and Knowledge group, in the Dept. of Informatics and Telecommunications, National and Kapodistrian University of Athens. She is a PhD candidate under the supervision of prof. Manolis Koubarakis and holds a B.Sc. and M.Sc. from the same department. Her research and development interests focus in the areas of spatiotemporal databases, Semantic Web and Cloud Computing. More specifically, she currently works in developing Ontology-based Data Access (OBDA) techniques for the semantic integration of data coming from different sources (files, databases, Rest APIs) creating virtual RDF graphs on top of them using ontologies and mappings, without materializing the data as RDF triples.

 

Description : Macintosh HD:Users:mugnier2:RoD:Rod-website:gs.jpg

 

George Stamoulis is a Researcher at the Management of Data, Information and Knowledge group, in the Dept. of Informatics and Telecommunications,  National and Kapodistrian University of Athens. Mr. Stamoulis is a PhD candidate under the supervision of Prof. Koubarakis and holds a B.Sc. and M.Sc. from the Department of Informatics and Telecommunications of the National and Kapodistrian University of Athens. His research and development activities focus in the areas of Semantic Web, Data Visualization

 and Integration and User Interfaces. More specifically, he develops techniques and software for the exploration and visualisation of linked geospatial data.

 

 

Programme et slides

 

9h15 : accueil cafˇ

 

9h30 – 12h30 : tutoriel Representation, Querying and Visualisation of Linked Geospatial Data

Konstantina Bereta et George Stamoulis  (NKUA)
slides

 

12h30-14h : Dˇjeuner

 

14h-17h : session Ē questions ouvertes et dˇmos Č

 

Spatio-Temporal Veracity Assessment
Joana Gonzales Malaverri (LRI)

slides

 

Ontology Mediated Query Rewriting challenged by aggregated queries in  OntoSIDES
Adam Sanchez / Fabrice Jouanot (LIG)

slides

 

Difficultˇs posˇes par les prˇdicats calculˇs en Ontology Mediated Query Answering
Jean-Fran¨ois Baget (Inria, LIRMM)

 

Besoins ontologiques dÕun syst¸me dÕirrigation intelligent : une comparaison entre SOSA/SSN et SAREF
Duy Nguyen (Irstea)

slides

 

Apprentissage par transfert pour la dˇtection des maladies dans les images de la culture du millet
Solemane Coulibaly / Bernard Kamsu Foguem (LGP-ENIT-INPT)

 

OntoRev : un moteur de rˇvision d'ontologies OWL
Chan Le Duc (LIASD)

 

An interface for Exploiting Spatio-temporal Heterogeneous Data (Environmental data, Ship Trajectory)

Alain Bouju (L3i)
slides