Geolinkeddata 07042011 1
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The document outlines the life cycle of linked geospatial data, including modeling geospatial domains and ontologies, generating RDF data from heterogeneous sources, publishing the data online according to linked data principles, and developing applications to unlock the value of the published geospatial data. It provides examples of tools used for each stage, such as geometry2rdf for generating RDF, Virtuoso for publishing, and map4rdf for a map-based visualization application.
Geolinkeddata 07042011 1
- 1. Alexander De Leon, Boris Villazon-Terrazas, Luis M. Vilches, Victor Saquicela Ontology Engineering Group Universidad Politécnica de Madrid Madrid, Spain jueves 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 2 jueves 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 3 jueves 7 de abril de 2011
- 4. Linked Data Life Cycle Modeling Generation Publication Exploitation 4 jueves 7 de abril de 2011
- 5. Domain Modeling Modeling Generation Publication Exploitation 5 jueves 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. 6 jueves 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 7 jueves 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 8 jueves 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 9 jueves 7 de abril de 2011
- 10. Geometry Model Simple Feature Specification 2010 OGC. 10 jueves 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 11 jueves 7 de abril de 2011
- 12. Data Generation Modeling Generation Publication Exploitation 12 jueves 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. 13 jueves 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 14 jueves 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) 15 jueves 7 de abril de 2011
- 16. geometry2rdf 16 jueves 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' 17 jueves 7 de abril de 2011
- 18. geometry2rdf 18 jueves 7 de abril de 2011
- 19. Data Publication Modeling Generation Publication Exploitation 19 jueves 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) 20 jueves 7 de abril de 2011
- 21. Data Publication olb ox? ou r to h at’s in • Virtuoso W • Apache Webserver + Pubby • Snorql 21 jueves 7 de abril de 2011
- 22. Exploitation Modeling Generation Publication Exploitation 22 jueves 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. 23 jueves 7 de abril de 2011
- 24. Exploitation olb ox? ou r to at’s in Wh • map4rdf 24 jueves 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) 25 jueves 7 de abril de 2011
- 26. map4rdf SPARQL map4rdf Endpoint Server Visualization in User’s Browser 26 jueves 7 de abril de 2011
- 27. map4rdf 27 jueves 7 de abril de 2011
- 28. map4rdf 28 jueves 7 de abril de 2011
- 29. 29 jueves 7 de abril de 2011