1. Boris Villazón-Terrazas, Ghislain Atemezing FI, UPM, bvillazon@fi.upm.es EURECOM, auguste.atemezing@eurecom.fr Introduction to Linked Data

2. Agenda  Linked Data  Geospatial LD Datasets  INSPIRE and LD  INSPIRE  INSPIRE and LD  Some Initiatives 24/06/2012- 2Tutorial “Lift your data”, Istanbul 2012

3. Agenda  Linked Data  Geospatial LD Datasets  INSPIRE and LD  INSPIRE  INSPIRE and LD  Some Initiatives 24/06/2012- 3Tutorial “Lift your data”, Istanbul 2012

4. Current Web - 4 Weather stations (Spain) Statistical Database (Spain) Data exposed to the Web via HTML, pdf, etc. © Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig Tutorial “Lift your data”, Istanbul 2012

5. 24/06/2012 -- 5 Information from single pages can be found via search engines © Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig Tutorial “Lift your data”, Istanbul 2012

6. 24/06/2012- - 6 © Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig Complex queries over multiple pages/data sources? Tutorial “Lift your data”, Istanbul 2012

7. What do we actually want?  Use the Web like a single global database  web of documents -> web of data 7 Statistical Database (Spain) Weather stations (Spain) © Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig

8. Linked Data enables such Web of Data - 8 Statistical Database (Spain) Weather stations (Spain) Global Identifier: URI (Uniform Resource Identifier), which is a string of characters used to identify a name or a resource on the Internet. http://../WStationM http://data.../Madrid Data Model: RDF (Resource Description Framework), which is a standard model for data interchange on the Web http://.../hasObservation http://.../name 8 “Unemployment in Madrid” Access Mechanism: HTTP Connection: Typed Links http://.../hasWeatherStation © Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig Tutorial “Lift your data”, Istanbul 2012

9. The four principles (Tim Berners Lee, 2006) 24/06/2012-- 9 1.Use URIs as names for things 2.Use HTTP URIs so that people can look up those names. 3.When someone looks up a URI, provide useful information, using the standards (RDF*, SPARQL) 4.Include links to other URIs, so that they can discover more things.  http://www.w3.org/DesignIssues/LinkedData. html  http://www.ted.com/talks/tim_berners_lee_on _the_next_web.html Tutorial “Lift your data”, Istanbul 2012

10. 24/06/2012-- 10 RDF is a basic KR language based on semantic networks Useful to represent metadata and describe any type of information in a machine-accesible way. Subject Object property Statement ignes:Madrid ignes:Spai n ignes:Murcia 1.027.914 geoes:isPartOf dbpedia:population “Madrid” rdfs:label geoes:isPartOf Tutorial “Lift your data”, Istanbul 2012

11. Evolution of the Linked Open Data 11  2007  2008  2009  2010 Tutorial “Lift your data”, Istanbul 2012

12. Linked Open Data 12 Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/ 2011 31 datasets 19.43% triples http://lod-cloud.net/state

13. Agenda  Linked Data  Geospatial LD datasets  INSPIRE and LD  INSPIRE  INSPIRE and LD  Some Initiatives 24/06/2012- 13Tutorial “Lift your data”, Istanbul 2012

14. GeoData is becoming increasingly relevant  Datasets in the geospatial domain contribute more than one fifth of the RDF triples in the Web of Data.  Well-know Geo LD datasets  Ordnance Survey  GeoLinkedData  LinkedGeoData  GeoNames  DBPedia  GDAM-RDF 24/06/2012 -- 14Tutorial “Lift your data”, Istanbul 2012

15. Ordnance Survey http://data.ordnancesurvey.co.uk  Topic: Administrative units  Datasets: The administrative gazeeter for Great Britain.  URI pattern: http://data.ordnancesurvey.co.uk/id/+  Vocabulary: Spatial Relations Ontology, Administrative Geography Ontology, WGS84, FOAF, and Gazeeter Ontology 25/10/2011 -Linked Data-a-thon - ISWC'2011, Bonn, Germany- 15

16. GeoLinkedData http://geo.linkeddata.es/  Topic: Hydrography, Administrative units, statistical information, meteorological features  Datasets: Statistical, geospatial, and meteorological data.  URI pattern:  http://geo.linkeddata.es/ontology/{concept|property}  http://geo.linkeddata.es/resource/{type}/{name}  Vocabulary: SCOVO, FAO Geopolitical, hydrOntology, WSG84, GeoLinkedData Geometry Model, and Time Ontology. 25/10/2011 -Linked Data-a-thon - ISWC'2011, Bonn, Germany- 16

17. LinkedGeoData http://linkedgeodata.org/  Topic: Points of interest  Datasets: OpenStreetMap database  URI pattern: http://linkedgeodata.org/triplify/+  Vocabulary: LGD Ontology, WGS84 25/10/2011 -Linked Data-a-thon - ISWC'2011, Bonn, Germany- 17

18. GeoNames http://www.geonames.org/  Topic: Toponyms  Datasets: Datasets used by geonames  URI pattern: http://sws.geonames.org/id/  Vocabulary: GeoNames Ontology, WGS84 25/10/2011 -Linked Data-a-thon - ISWC'2011, Bonn, Germany- 18

19. DBPedia http://dbpedia.org/  Topic: General knowledge  Datasets: Wikipedia  URI pattern: http://dbpedia.org/resource/+  Vocabulary: DBPedia ontology, WGS84 25/10/2011 -Linked Data-a-thon - ISWC'2011, Bonn, Germany- 19

20. GADM-RDF http://gadm.geovocab.org/  Topic: Global administrative areas  Datasets: countries and lower level subdivisions.  URI pattern: http://gadm.geovocab.org/id/+  Vocabulary: gadm ontology, NeoGeo Ontology, DBPedia ontology, WGS84 25/10/2011 -Linked Data-a-thon - ISWC'2011, Bonn, Germany- 20

21. Agenda  Linked Data  Geospatial LD Datasets  INSPIRE and LD  INSPIRE  INSPIRE and LD  Some Initiatives 24/06/2012- 21Tutorial “Lift your data”, Istanbul 2012

22. INSPIRE vs LD  SIMILARITIES  Free access to (Geo)-Data  Publish data in a standardised format  GML (OGC ) vs RDF (W3C)  Generate TRANSPARENCY, INNOVATION  Good for re-use  BUT…  RDF is good for 4+5 stars data  INSPIRE data are 2+3 stars in LD stars scale  Need to link to geo features from other entities on the web.. 24/06/2012- 22Tutorial “Lift your data”, Istanbul 2012

23. Towards INSPIRE (semantic)- Catalogue? 24/06/2012- 23 * INSPIRE GeoPortal (to find datasets) http://inspire-geoportal.ec.europa.eu/discovery/ Tutorial “Lift your data”, Istanbul 2012 *SKOS Glossary for Spatial Data Infrastructure: http://semanticlab.jrc.ec.europa.eu/

24. 24/06/2012- 24Tutorial “Lift your data”, Istanbul 2012 http://www.flickr.com/photos/wwworks/4759535950 /

25. Boris Villazón-Terrazas, Ghislain Atemezing FI, UPM, bvillazon@fi.upm.es EURECOM, auguste.atemezing@eurecom.fr Introduction to Linked Data