Ecuadorian Geospatial Linked Data
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This document describes KDrive, a project to publish Ecuadorian geospatial data as linked data. It discusses the motivation, architecture, and life cycle for generating and linking geospatial linked data. Key aspects include selecting geospatial data sources from Ecuadorian government agencies, defining URIs and vocabularies for geospatial resources, using tools like GeoKettle to generate RDF from geospatial file formats, linking the data, and making it available for querying via SPARQL and visualization on a map. The goal is to publish and exploit linked geospatial data about things like rivers and provinces in Ecuador.
Ecuadorian Geospatial Linked Data
- 1. KDrive Ecuadorian Geospatial Linked Data Victor Saquicela1, Mauricio Espinoza1, Nelson Piedra2, and Boris Villazón-Terrazas3 Universidad de Cuenca, Ecuador {victor.saquicela,mauricio.espinoza}@ucuenca.edu.ec 2 Universidad Técnica Particular de Loja, Ecuador nopiedra@utpl.edu.ec 3 Intelligent Software Components, iSOCO bvillazon@isoco.com @boricles http://www.slideshare.net/boricles 1
- 2. ToC » Motivation » Architecture » Geospatial Linked Data Life Cycle 2
- 3. Motivation http://datosenlazados.org/cms/ http://linkeddata.ec/ 3
- 5. Geospatial Linked Data Life Cycle Taking into account geospatial component • Selection of geospatial data sources • URIs for geospatial resources • Geospatial Vocabularies • RDF generation for the geospatial data • Linking of geospatial data Boris Villazon-Terrazas, Luis Vilches, Asunción Gómez-Pérez, and Oscar Corcho Methodological Guidelines for Publishing Linked Data. http://link.springer.com/chapter/10.1007/978-1-4614-1767-5_2 5
- 6. Selection of the data sources • Identify and select geospatial resources from Ecuadorian Government Agencies. • Geo-databases • Shapefiles • Spreadsheets • KML 6
- 7. URIs for Geospatial Resources • General guidelines - - - - - • BP for publishing LD http://www.w3.org/TR/ld-bp/ URIs for UK Public sector https://www.gov.uk/government/publications/designing-uri-sets-for-the-uk-public-sector Study of persistent URIs http://philarcher.org/diary/2013/uripersistence/ Guidelines for Naming and Labeling Ontologies http://dcevents.dublincore.org/IntConf/dc-2011/paper/download/47/15 …. Geospatial specific guidelines - - - - - RFC5870 URI for geospatial locations http://tools.ietf.org/search/rfc5870 INSPIRE http://inspire.jrc.ec.europa.eu/events/conferences/inspire_2012/presentations/ds1/ Clements%20Portele.pdf https://www.deri.ie/content/applying-design-patterns-uri-strategies-naming-linked-geospatialdata-infrastructure http://inspire-forum.jrc.ec.europa.eu/pg/forum/topic/29922/cool-uris-for-linked-geospatialdata/ … 7
- 8. Geospatial Vocabularies • NeoGeo http://geovocab.org/doc/neogeo/ • GeoSPARQL http://www.opengeospatial.org/standards/geosparql • ISA Programme Location Core Vocabulary • schema.org http://schema.org/ - - - http://schema.org/Place http://schema.org/GeoShape http://schema.org/GeoCoordinates • Place GeoShape GeoCoordinates http://www.w3.org/ns/locn ISO-19115 Ontology https://www.seegrid.csiro.au/subversion/xmml/metadata/ISO19115/iso-19115.owl … 8
- 9. Geospatial Vocabularies • Some discussions - Geometry separated from the feature - Represent geometry as RDF Literal - Represent CRS as a property. - URIs for the CRSs, e.g., http://geovocab.org/crs/EPSG4979 - Multilinguality 9
- 10. RDF Generation for the Geospatial Data • GeoKettle - - Spatially-enabled version of the generic ETL tool, Kettle (Pentaho Data Integration) Powerful, metadata-driven spatial ETL tool dedicates to the integration of different geospatial data resources Transform Extract Load RDF Generator Plugins Image taken from http://www.spatialytics.org/projects/geokettle/ 10
- 11. RDF Generation for the Geospatial Data Reading shape files SRS Transformation RDF Generation 11
- 12. Linking of Geospatial Data http://wifo5-03.informatik.uni-mannheim.de/bizer/silk/ 12
- 13. Publication and Exploitation Rivers of the province of Guayas PREFIX geo: <http://www.opengis.net/ont/geosparql#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX geof: <http://www.opengis.net/def/function/geosparql/> PREFIX sf: <http://www.opengis.net/ont/sf#> PREFIX units: <http://www.opengis.net/def/uom/OGC/1.0/> SELECT distinct ?r ?label ?Figure ?r2 ?Figure2 WHERE { ?r rdf:type <http://geo.linkeddata.ec/ontology/riosdobles_promsa>. ?r rdfs:label ?label. ?r geo:hasGeometry ?geo. ?geo rdf:type ?geoType . ?geo geo:asWKT ?Figure. http://purl.org/Ecuador/geo/sparql SPARQL ?r2 rdf:type <http://geo.linkeddata.ec/ontology/provincias_promsa>. ?r2 rdfs:label "GUAYAS"@es. ?r2 geo:hasGeometry ?geo2. ?geo2 rdf:type ?geoType2 . ?geo2 geo:asWKT ?Figure2. FILTER (geof:sfIntersects(?Figure2, ?Figure)). } Parliament 13
- 14. Publication and Exploitation Rivers of the province of Guayas PREFIX geo: <http://www.opengis.net/ont/geosparql#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX geof: <http://www.opengis.net/def/function/geosparql/> PREFIX sf: <http://www.opengis.net/ont/sf#> PREFIX units: <http://www.opengis.net/def/uom/OGC/1.0/> SELECT distinct ?r ?label ?Figure ?r2 ?Figure2 WHERE { ?r a <http://geo.linkeddata.ec/ontology/riosdobles_promsa>. ?r rdfs:label ?label. ?r geo:hasGeometry ?geo. ?geo rdf:type ?geoType . ?geo geo:asWKT ?Figure. ?r2 a <http://geo.linkeddata.ec/ontology/provincias_promsa>. ?r2 rdfs:label "GUAYAS"@es. ?r2 geo:hasGeometry ?geo2. ?geo2 rdf:type ?geoType2 . ?geo2 geo:asWKT ?Figure2. FILTER (geof:sfIntersects(?Figure2, ?Figure)). } SPARQL http://200.0.31.28:8081/map4rdf-0.0.4-OL-SNAPSHOT/#dashboard Parliament 14
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- 16. KDrive Ecuadorian Geospatial Linked Data Victor Saquicela1, Mauricio Espinoza1, Nelson Piedra2, and Boris Villazón-Terrazas3 Universidad de Cuenca, Ecuador {victor.saquicela,mauricio.espinoza}@ucuenca.edu.ec 2 Universidad Técnica Particular de Loja, Ecuador nopiedra@utpl.edu.ec 3 Intelligent Software Components, iSOCO bvillazon@isoco.com @boricles http://www.slideshare.net/boricles 1