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. geometry2rdf Victor Saquicela, Boris Villazón-Terrazas, Alexander de León, Luis M. Vilches, and Oscar Corcho Facultad de Informática, Universidad Politécnica de Madrid Campus de Montegancedosn, 28660 Boadilla del Monte, Madrid http://www.oeg-upm.net Phone: 34.91.3366605, Fax: 34.91.3524819

2. ToC Motivation Briefdescription Howitworks FutureWork 2

3. Motivation Holidaystovisit Mora Municipality in Spain. Wanttoknow places topracticewater-relatedsportsclosetothearea 3 ?

4. Motivation In the geospatial context, the transformation and publication of the OpenStreetMap Ordnance Survey GeoLinkedData data 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. Motivation So, let’sconvertthegeospatialinformationinto RDF But, how? 5 geometry2rdf http://www.oeg-upm.net/index.php/en/downloads/151-geometry2rdf http://mccarthy.dia.fi.upm.es/geometry2rdf/

6. geometry2rdf Toolforgenerating RDF fromgeometricalinformation Thegeometrycouldbeavailable in GML or WKT The RDF generatedfollowsourGeometryModel Howitworks? 6

7. In a nutshell 7

8. Extractingthe GML fromthe Oracle GeoSpatialDatabases Oracle STO UTIL package SELECT TO_CHAR(SDO_UTIL.TO_GML311GEOMETRY(geometry)) AS Gml311Geometry FROM "BCN200"."BCN200_0301L_RIO" c WHERE c.Etiqueta='Arroyo' 8

9. Generation of the RDF resources 9

10. Generation of the RDF resources 10 Java geoobjects

11. GeometryModel 11 geoes: http://geo.linkeddata.es/ geo: http://www.w3.org/2003/01/geo/wgs84_pos# geoes:ontology/Geometría rdfs:subClassOf rdfs:subClassOf rdfs:subClassOf geoes:ontology/Polígono geoes:ontology/Curva geo:Point formadoPor formadoPor Collection of 2 or more geo:Points 39 39 geo:lat geo:long Collection of 3 or more geo:Points

12. RDF generatedaccordingtoourGeometryModel 1 2 0 0 12

13. Now, we can expressourquery PREFIX 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 ?longitude WHERE { <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 20 13

14. Visualizeitonthemap, and … 14

16. fromshape files

17. fromother DBMS

18. ImproveourGeometryModel15

19. Thank you 16

20. geometry2rdf Victor Saquicela, Boris Villazón-Terrazas, Alexander de León, Luis M. Vilches, and Oscar Corcho Facultad de Informática, Universidad Politécnica de Madrid Campus de Montegancedosn, 28660 Boadilla del Monte, Madrid http://www.oeg-upm.net Phone: 34.91.3366605, Fax: 34.91.3524819