geometry2rdf is a tool that generates RDF from geometric information. It can extract geometry from GML or WKT formats and generate RDF according to a Geometry Model that represents geometric entities like points, polygons, and curves as RDF resources. The RDF generated can then be queried and visualized on a map. Future work includes generating RDF from additional data sources like shapefiles and other DBMS, improving the Geometry Model, and extracting GML from spatial databases.

1. geometry2rdfVictor Saquicela, Boris Villazón-Terrazas, Alexander de León, Luis M. Vilches, and Oscar CorchoFacultad de Informática, Universidad Politécnica de MadridCampus de Montegancedosn, 28660 Boadilla del Monte, Madridhttp://www.oeg-upm.netPhone: 34.91.3366605, Fax: 34.91.3524819

2. ToCMotivationBriefdescriptionHowitworksFutureWork2

3. MotivationHolidaystovisit Mora Municipality in Spain.Wanttoknow places topracticewater-relatedsportsclosetothearea3?

4. MotivationIn the geospatial context, the transformation and publication of the OpenStreetMapOrdnance SurveyGeoLinkedDatadata according to the Linked Data principles have added a new dimension to the Web of Data. In this way spatial data can be retrieved and interlinked.4

5. MotivationSo, let’sconvertthegeospatialinformationinto RDFBut, how?5geometry2rdfhttp://www.oeg-upm.net/index.php/en/downloads/151-geometry2rdfhttp://mccarthy.dia.fi.upm.es/geometry2rdf/

6. geometry2rdfToolforgenerating RDF fromgeometricalinformationThegeometrycouldbeavailable in GML or WKTThe RDF generatedfollowsourGeometryModelHowitworks?6

7. In a nutshell7

8. Extractingthe GML fromthe Oracle GeoSpatialDatabasesOracle STO UTIL package SELECT TO_CHAR(SDO_UTIL.TO_GML311GEOMETRY(geometry)) AS Gml311GeometryFROM "BCN200"."BCN200_0301L_RIO" cWHERE c.Etiqueta='Arroyo'8

9. Generation of the RDF resources9

10. Generation of the RDF resources10Java geoobjects

11. GeometryModel11geoes: http://geo.linkeddata.es/geo: http://www.w3.org/2003/01/geo/wgs84_pos#geoes:ontology/Geometríardfs:subClassOfrdfs:subClassOfrdfs:subClassOfgeoes:ontology/Polígonogeoes:ontology/Curvageo:PointformadoPorformadoPorCollection of 2 or more geo:Points3939geo:latgeo:longCollection of 3 or more geo:Points

12. RDF generatedaccordingtoourGeometryModel120012

13. Now, we can expressourqueryPREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> SELECT ?subject ?latitude2 ?longitude2 (bif:st_distance(bif:st_point(?longitude,?latitude),bif:st_point(?longitude2,?latitude2)) ) as ?distancia ?latitude ?longitudeWHERE {<http://geo.linkeddata.es/resource/Municipio/Mora> geo:geometry ?g . ?g geo:lat ?latitude. ?g geo:long ?longitude. ?subjectgeo:geometry ?g2. ?g2 geo:lat ?latitude2. ?g2 geo:long ?longitude2.} limit 2013

14. Visualizeitonthemap, and …14

15. FutureworkIncludethegeneration

16. fromshape files

17. fromother DBMS

18. ImproveourGeometryModel15

19. Thank you16

20. geometry2rdfVictor Saquicela, Boris Villazón-Terrazas, Alexander de León, Luis M. Vilches, and Oscar CorchoFacultad de Informática, Universidad Politécnica de MadridCampus de Montegancedosn, 28660 Boadilla del Monte, Madridhttp://www.oeg-upm.netPhone: 34.91.3366605, Fax: 34.91.3524819