an approach to publish spatial data on the web: the geolinked data use case
TRANSCRIPT
An Approach to Publish Spatial Data on the Web:
The GeoLinked Data Use Case
Luis M. Vilches-Blázquez, Boris Villazón-Terrazas, Alexander de LeónFreddy Priyatna, and Oscar Corcho
Facultad de Informática, Universidad Politécnica de MadridCampus de Montegancedo sn, 28660 Boadilla del Monte, Madrid
http://www.oeg-upm.netPhone: 34.91.3366605, Fax: 34.91.3524819
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
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).
A Process for Publishing GeoLinked Data
1. Identificationof the data sources
2. Ontologymodelling
3. Generationof the RDF data
4. Data publication and visualization
1. Identification of the data sources
IGNNational Geographic Institute of Spain
Oracle & MySQL
All these data sources contain multilingual information in the official languages of Spain (Castilian, Galician, Catalan, and Basque).
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 fromseveral cartographic agencies and other international resources.
• Regarding methodological issues, the approach adopted isMETHONTOLOGY, a widely-used ontology building methodology.
• Knowledge models (feature catalogues of the IGN, the WaterFramework European Directive, the Alexandria Digital Library, theUNESCO Thesaurus, Getty Thesaurus, GeoNames, FACC codes,etc.).
• It has 150 classes, 34 object properties, 66 data properties and 256axioms.
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.
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
SPARQL
Pubby
Linked DataHTML
Virtuoso 6.1.0
Pubby 0.3
Including ProvenanceSupport
4. Data publication and visualization
Metadata elements:- Dublin Core- voiD metadata
http://geo.linkeddata.es/
Provinces
Beaches
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
An Approach to Publish Spatial Data on the Web:
The GeoLinked Data Use Case
Luis M. Vilches-Blázquez, Boris Villazón-Terrazas, Alexander de LeónFreddy Priyatna, and Oscar Corcho
Facultad de Informática, Universidad Politécnica de MadridCampus de Montegancedo sn, 28660 Boadilla del Monte, Madrid
http://www.oeg-upm.netPhone: 34.91.3366605, Fax: 34.91.3524819