GeoLinkedData
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GeoLinkedData

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Overview of the GeoLinkedData project.

Overview of the GeoLinkedData project.

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  • 1. Alexander De Leon, Boris Villazon-Terrazas, Luis M. Vilches, Victor Saquicela Ontology Engineering Group Universidad Politécnica de Madrid Madrid, Spainjueves 7 de abril de 2011
  • 2. Motivation • 80% information has a geospatial part. • GeoLinkedData is an open initiative whose aim is to enrich the Web of Data with Spanish geospatial data. http://geo.linkeddata.es 2jueves 7 de abril de 2011
  • 3. Motivation • It is publishing diverse information from the National Geographic Institute (IGN) and the National Statistics Institute (INE). http://geo.linkeddata.es 3jueves 7 de abril de 2011
  • 4. Linked Data Life Cycle Modeling Generation Publication Exploitation 4jueves 7 de abril de 2011
  • 5. Domain Modeling Modeling Generation Publication Exploitation 5jueves 7 de abril de 2011
  • 6. Domain Modeling • Designing the vocabularies/ontologies that model a view of the domain at hand. • Reuse existing vocabularies in full or partially. 6jueves 7 de abril de 2011
  • 7. Geometry Model • Simple Features Specification as base hyerarchy of geometry types. • Feature and Geometry are separate objects Requirements captured at GeoVoCamp Southampton 2011 7jueves 7 de abril de 2011
  • 8. Geometry Model • A feature can have multiple geometries, geometries are parameterized (e.g. reference system, dimension, resolution, temporal aspects) • Different geometry representations are resolvable via content negotiation. Requirements captured at GeoVoCamp Southampton 2011 8jueves 7 de abril de 2011
  • 9. Geometry Model • Topological relations (as per RCC8) can be inferred or made explicit between geometries. Requirements captured at GeoVoCamp Southampton 2011 9jueves 7 de abril de 2011
  • 10. Geometry Model Simple Feature Specification 2010 OGC. 10jueves 7 de abril de 2011
  • 11. Geometry Model • One importante issue: How to handle order of points in composite geometries? • Using an order data property. • rdf:seq • rdf:List • SPARQL 1.1 allows to query this. Requirements captured at GeoVoCamp Southampton 2011 11jueves 7 de abril de 2011
  • 12. Data Generation Modeling Generation Publication Exploitation 12jueves 7 de abril de 2011
  • 13. Data Generation • Adquiere data from heterogenous data sources and transforme it to RDF using the choose domain model; • Or generate new data directly as RDF. 13jueves 7 de abril de 2011
  • 14. Data Generation olb ox? ou r to •Domain independent tools: at’s in Wh • ODEMapster • NOR2O • Domain specific tools: • geometry2rdf 14jueves 7 de abril de 2011
  • 15. geometry2rdf Generation of RDF from geospatial relational databases. • Configurable data model • Support of geo datatypes in RDBMS (e.g. Oracle, GML, WKT) 15jueves 7 de abril de 2011
  • 16. geometry2rdf 16jueves 7 de abril de 2011
  • 17. geometry2rdf Oracle STO UTIL package SELECT TO_CHAR(SDO_UTIL.TO_GML311GEOMETRY(geometry)) AS Gml311Geometry FROM "BCN200"."BCN200_0301L_RIO" c WHERE c.Etiqueta=Arroyo 17jueves 7 de abril de 2011
  • 18. geometry2rdf 18jueves 7 de abril de 2011
  • 19. Data Publication Modeling Generation Publication Exploitation 19jueves 7 de abril de 2011
  • 20. Data Publication • Make data accessible on the Web according to the Linked Data Principles • Make your dataset visible • Dataset Repositories (e.g. CKAN) • Indexing Services (e.g. Sindice, sameas.org) 20jueves 7 de abril de 2011
  • 21. Data Publication olb ox? ou r to h at’s in • Virtuoso W • Apache Webserver + Pubby • Snorql 21jueves 7 de abril de 2011
  • 22. Exploitation Modeling Generation Publication Exploitation 22jueves 7 de abril de 2011
  • 23. Exploitation • Develop application that unlocks the value of the data to provide benefits to a specific community of end users. 23jueves 7 de abril de 2011
  • 24. Exploitation olb ox? ou r to at’s in Wh • map4rdf 24jueves 7 de abril de 2011
  • 25. map4rdf Map-based visualization of RDF Linked Data with Geospatial dimensions. • Faceted navigation. • Suport for complex geometries (Lines, Polygons, etc) • Extensible overlays (e.g. statical data) 25jueves 7 de abril de 2011
  • 26. map4rdf SPARQL map4rdf Endpoint Server Visualization in User’s Browser 26jueves 7 de abril de 2011
  • 27. map4rdf 27jueves 7 de abril de 2011
  • 28. map4rdf 28jueves 7 de abril de 2011
  • 29. 29jueves 7 de abril de 2011