Enriching the German National Library's LinkedData Service with Geographic Coordinates

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A presentation about the approach chosen to represent geographic coordinates for maps and geographic entities in the data from the Deutsche Nationalbibliothek (German National Library, DNB). The presentation is part of the programme of the W3C workshop on Linking Geospatial Data (http://www.w3.org/2014/03/lgd/).

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Enriching the German National Library's LinkedData Service with Geographic Coordinates

  1. 1. Lars G. Svensson Enriching the German National Library’s Linked Data Service with Geographic Coordinates : Approach and Lessons Learned (so far) 1 |6 | Geographic Coordinates in DNB Data : Linking Geospatial Data | March 5, 2014
  2. 2. The DNB has started to publish geospatial data Point coordinates and bounding boxes Titles (27 mill.) Maps & Charts (20,000) 2 |6 Authorities (10 mill.) Geographic entities (40,000 with coordinates) Currently only Point coordinates | Geographic Coordinates in DNB Data : Linking Geospatial Data | March 5, 2014
  3. 3. The links between titles and places allows you to find publications dealing with a specific location 3
  4. 4. – We wanted to use the same vocabulary for all entity types (maps and places) and for all coordinate types (points and polygons) – The vocabulary should be widely deployed and allow the customers to do interesting stuff with the data 4 |6 | Geographic Coordinates in DNB Data : Linking Geospatial Data | March 5, 2014 Map by OpenStreetMap (CC BY-SA) For the RDF representation we had two major requirements
  5. 5. We decided to use geosparql with simple features, but they are not easy for laymen to use correctly… 5 <http://d-nb.info/1037321472> a bibo:Map , bibo:Document ; bibo:isbn13 "9783869874982" ; dcterms:isPartOf <http://d-nb.info/551113464> ; isbd:P1053 "1 Kt." ; dcterms:spatial [ a sf:Polygon ; geo:asWKT "Polygon (( +009.766666 +054.866666, +009.766666 +054.183333, +011.433333 +054.183333, +011.433333 +054.866666, +009.766666 +054.866666 ))"^^geo:wktLiteral . ]; dcterms:subject <http://d-nb.info/gnd/4030486-3> , <http://d-nb.info/gnd/4179589-1> ; dcterms:issued "2013" ; dc:title "[Deutsche Seekarte]" ; rda:otherTitleInformation "30. INT 1353. Ostsee. Deutsche und dänische Küste. Kieler Bucht" .
  6. 6. It‘s easy to find out more: General information about the DNB linked data service: http://www.dnb.de/EN/lds Or just send us a question: j.hauser@dnb.de datendienste@dnb.de 6 |6 | Geographic Coordinates in DNB Data : Linking Geospatial Data | March 5, 2014

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