An Approach to Publish Spatial Data
          on the Web:
  The GeoLinked Data Use Case




  Luis M. Vilches-Blázquez, Bo...
ToC



• Introduction

• A Process for Publishing GeoLinked Data
      •   Identification of the data sources
      •   On...
Introduction


• Open Data Movement and Web of Data.

• GeoLinkedData is an open initiative whose aim is to
  enrich the W...
A Process for Publishing GeoLinked Data


  1. Identification
of the data sources



    2. Ontology
     modelling



   ...
1. Identification of the data sources


             IGN
National Geographic Institute of Spain

         Oracle & MySQL

...
2. Ontology modelling


• hydrOntology is an OWL-DL ontology that follows a top-down
  development approach.
   • It attem...
3. Generation of the RDF Data
• R2O is an extensible, fully declarative language to describe
  mappings between relational...
3. Generation of the RDF Data

• Creation of the R2O Mappings
3. Generation of the RDF Data
3. Generation of the RDF Data



       Excerpt of the R2O document
4. Data publication and visualization




                HTML               Linked Data         SPARQL




Including Prov...
4. Data publication and visualization



                 Metadata elements:
                 - Dublin Core
              ...
http://geo.linkeddata.es/
Provinces
Beaches
Conclusions and Future Work


• Conclusions
  • An ongoing process aimed at publishing spatial data on the
    Web with a ...
An Approach to Publish Spatial Data
          on the Web:
  The GeoLinked Data Use Case




  Luis M. Vilches-Blázquez, Bo...
An Approach to Publish Spatial Data on the Web: The GeoLinked Data Use Case
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An Approach to Publish Spatial Data on the Web: The GeoLinked Data Use Case

  1. 1. An Approach to Publish Spatial Data on the Web: The GeoLinked Data Use Case Luis M. Vilches-Blázquez, Boris Villazón-Terrazas, Alexander de León Freddy Priyatna, and Oscar Corcho Facultad de Informática, Universidad Politécnica de Madrid Campus de Montegancedo sn, 28660 Boadilla del Monte, Madrid http://www.oeg-upm.net Phone: 34.91.3366605, Fax: 34.91.3524819
  2. 2. ToC • Introduction • A Process for Publishing GeoLinked Data • Identification of the data sources • Ontology modelling • Generation of the RDF data • Data publication and visualization • Conclusions and Future Work
  3. 3. Introduction • Open Data Movement and Web of Data. • GeoLinkedData is an open initiative whose aim is to enrich the Web of Data with Spanish geospatial data. • It has started off by publishing diverse information sources from the National Geographic Institute of Spain (IGN).
  4. 4. A Process for Publishing GeoLinked Data 1. Identification of the data sources 2. Ontology modelling 3. Generation of the RDF data 4. Data publication and visualization
  5. 5. 1. Identification of the data sources IGN National Geographic Institute of Spain Oracle & MySQL All these data sources contain multilingual information in the official languages of Spain (Castilian, Galician, Catalan, and Basque).
  6. 6. 2. Ontology modelling • hydrOntology is an OWL-DL ontology that follows a top-down development approach. • It attempts to cover most of the concepts of the hydrographical domain. • Harmonizing heterogeneous information sources coming from several cartographic agencies and other international resources. • Regarding methodological issues, the approach adopted is METHONTOLOGY, a widely-used ontology building methodology. • Knowledge models (feature catalogues of the IGN, the Water Framework European Directive, the Alexandria Digital Library, the UNESCO Thesaurus, Getty Thesaurus, GeoNames, FACC codes, etc.). • It has 150 classes, 34 object properties, 66 data properties and 256 axioms.
  7. 7. 3. Generation of the RDF Data • R2O is an extensible, fully declarative language to describe mappings between relational database schemas and ontologies. • The ODEMapster processor generates Semantic Web instances from relational instances based on the mapping description expressed in the R2O document.
  8. 8. 3. Generation of the RDF Data • Creation of the R2O Mappings
  9. 9. 3. Generation of the RDF Data
  10. 10. 3. Generation of the RDF Data Excerpt of the R2O document
  11. 11. 4. Data publication and visualization HTML Linked Data SPARQL Including Provenance Support Pubby Pubby 0.3 Virtuoso 6.1.0
  12. 12. 4. Data publication and visualization Metadata elements: - Dublin Core - voiD metadata
  13. 13. http://geo.linkeddata.es/
  14. 14. Provinces
  15. 15. Beaches
  16. 16. Conclusions and Future Work • Conclusions • An ongoing process aimed at publishing spatial data on the Web with a Spanish GeoLinked Data use case • The process followed and proposed methodological guidelines for the involved activities. • Future work • Data cleansing • Identifying and interlinking with DBpedia and Geonames • Include other domains • Improve faceted browser
  17. 17. An Approach to Publish Spatial Data on the Web: The GeoLinked Data Use Case Luis M. Vilches-Blázquez, Boris Villazón-Terrazas, Alexander de León Freddy Priyatna, and Oscar Corcho Facultad de Informática, Universidad Politécnica de Madrid Campus de Montegancedo sn, 28660 Boadilla del Monte, Madrid http://www.oeg-upm.net Phone: 34.91.3366605, Fax: 34.91.3524819
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