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