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| 6 | Geographic Coordinates in DNB Data : Linking Geospatial Data | March 5, 20141
Enriching the German National Library’s Linked Data Service with Geographic Coordinates : Approach and Lessons Learned (so far)
Lars G. Svensson
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The DNB has started to publish geospatial data
| 6 | Geographic Coordinates in DNB Data : Linking Geospatial Data | March 5, 20142
Titles (27 mill.)
Maps & Charts
(20,000)
Authorities (10 mill.)
Geographic entities
(40,000 with coordinates)
Currently only Point
coordinates
Point coordinates
and bounding boxes
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The links between titles and places allows you to find publications dealing with a specific location
3
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For the RDF representation we had two major requirements
– 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
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Map
by O
pen
Str
eetM
ap
(C
C B
Y-S
A)
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We decided to use geosparql with simple features, but they are not easy for laymen to use correctly…<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" .5
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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:
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