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Alexander De Leon, Boris Villazon-Terrazas, Luis M. Vilches, Victor                                                  Saqui...
Motivation           • 80% information has a geospatial part.           • GeoLinkedData is an open initiative whose       ...
Motivation           • It is publishing diverse information from the               National Geographic Institute (IGN) and...
Linked Data Life                                 Cycle             Modeling          Generation   Publication   Exploitati...
Domain Modeling             Modeling       Generation   Publication   Exploitation                                        ...
Domain Modeling           • Designing the vocabularies/ontologies that               model a view of the domain at hand.  ...
Geometry Model           • Simple Features Specification as base               hyerarchy of geometry types.           • Fea...
Geometry Model           • A feature can have multiple geometries,               geometries are parameterized (e.g. refere...
Geometry Model           • Topological relations (as per RCC8) can be               inferred or made explicit between geom...
Geometry Model                                  Simple Feature Specification 2010 OGC.   10jueves 7 de abril de 2011
Geometry Model           • One importante issue: How to handle order               of points in composite geometries?     ...
Data Generation             Modeling          Generation   Publication   Exploitation                                     ...
Data Generation           • Adquiere data from heterogenous data sources               and transforme it to RDF using the ...
Data Generation                                      olb ox?                               ou r to          •Domain indepe...
geometry2rdf              Generation of RDF from geospatial relational            databases.           • Configurable data ...
geometry2rdf                                           16jueves 7 de abril de 2011
geometry2rdf                                  Oracle STO UTIL package                                  SELECT TO_CHAR(SDO_...
geometry2rdf                                           18jueves 7 de abril de 2011
Data Publication             Modeling          Generation   Publication   Exploitation                                    ...
Data Publication           • Make data accessible on the Web according to               the Linked Data Principles        ...
Data Publication                                      olb ox?                               ou r to           h at’s      ...
Exploitation             Modeling        Generation   Publication   Exploitation                                          ...
Exploitation                • Develop application that unlocks the value                    of the data to provide benefits...
Exploitation                                      olb ox?                               ou r to             at’s          ...
map4rdf              Map-based visualization of RDF Linked Data            with Geospatial dimensions.           • Faceted...
map4rdf                      SPARQL       map4rdf                      Endpoint     Server    Visualization in            ...
map4rdf                                      27jueves 7 de abril de 2011
map4rdf                                      28jueves 7 de abril de 2011
29jueves 7 de abril de 2011
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GeoLinkedData

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Overview of the GeoLinkedData project.

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Transcript of "GeoLinkedData"

  1. 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. 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. 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. 4. Linked Data Life Cycle Modeling Generation Publication Exploitation 4jueves 7 de abril de 2011
  5. 5. Domain Modeling Modeling Generation Publication Exploitation 5jueves 7 de abril de 2011
  6. 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. 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. 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. 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. 10. Geometry Model Simple Feature Specification 2010 OGC. 10jueves 7 de abril de 2011
  11. 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. 12. Data Generation Modeling Generation Publication Exploitation 12jueves 7 de abril de 2011
  13. 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. 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. 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. 16. geometry2rdf 16jueves 7 de abril de 2011
  17. 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. 18. geometry2rdf 18jueves 7 de abril de 2011
  19. 19. Data Publication Modeling Generation Publication Exploitation 19jueves 7 de abril de 2011
  20. 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. 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. 22. Exploitation Modeling Generation Publication Exploitation 22jueves 7 de abril de 2011
  23. 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. 24. Exploitation olb ox? ou r to at’s in Wh • map4rdf 24jueves 7 de abril de 2011
  25. 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. 26. map4rdf SPARQL map4rdf Endpoint Server Visualization in User’s Browser 26jueves 7 de abril de 2011
  27. 27. map4rdf 27jueves 7 de abril de 2011
  28. 28. map4rdf 28jueves 7 de abril de 2011
  29. 29. 29jueves 7 de abril de 2011
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