Open Location Data and Linked Open Data

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    19-Jan-2015

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Timo WestkmperMysema Oy

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1. Open Location Data and Linked Open Data Timo WestkmperMysema OyEmail : timo.westkamper@mysema.com 2. semantic.hri.fiCapital region data Faceted search interface SPARQL form and interface Map visualization (GoogleMaps based) 3. semantic.hri.fiMaterial Aluesarjat data in RDF Town part borders as KML-files DBpedia town part descriptions 4. Semantic Web challengesScaling too generic model, difficult to index optimization of RDF storage difficult, nostandards SPARQL is a generic interface, difficult tooptimize 5. Linked Open Data challenges Poor quality of data foundation, e.g. GeoNames Heterogenic ontologies and resourceidentification Crowd-sourcing material as foundation 6. Linking in practice Geonames material has lots of duplicates DBpedia has mostly description, not muchsemantics Linking easiest via owl:sameAs predicate 7. Areastats demoMaterial semantic.hri.fi material Java service uses KML files for point-in-polygoncheck http://en.wikipedia.org/wiki/Point_in_polygon 8. HTML5 GeoLocation APIgeo-location-javascript wrapper API for various GEO APIimplementationsif (geo_position_js.init()) {geo_position_js.getCurrentPosition(geo_success, geo_error);}function geo_success(p) {alert("Found you at latitude "+ p.coords.latitude + ", longitude "+ p.coords.longitude);} 9. Questions?