In this paper we explore the use of location aware mobile devices for searching and browsing a large number of general and cultural heritage information repositories. Based on GPS positioning we can determine a user's location and context, composed of physical nearby locations, historic events that have taken place there, artworks that were created at or inspired by those locations and artists that have lived or worked there. Based on a geolocation, the user has three levels of refinement: pointing to a specific heading and selection and facets and subfacets of cultural heritage objects. In our approach two types of knowledge are combined: general knowledge about geolocations and points of interest and specialized knowledge about a particular domain, i.e. cultural heritage. We use a number of Linked Open Data sources and a number of general sources from the cultural heritage domain (including Art and Architecture Thesaurus, Union List of Artist Names) as well as data from several Dutch cultural institutions. We show three concrete scenarios where a tourist accesses localized information on his iPhone about the current environment, events, artworks or persons, which are enriched by Linked Open Data sources. We show that Linked Open Data sources in isolation are currently too limited to provide interesting semantic information but combined with each other and with a number of other sources a really informative location-based service can be created.

2. Data: http://bit.ly/ekaw2010 Simulator: http://bit.ly/i-ams iOS: http://bit.ly/lodapp

3. Recovering of tourism market in Amsterdam not fast enough

21. <title>De Prinsengracht bij de Reesluis, 1663 - 1664</title> <keywords>schilderij, stadsgezicht, stadsgezicht Amsterdam, Prinsengracht, Reesluis, scheepvaart</keywords>

22. <title>Roemer EERSTE STEENLEGGING NIEUWE KERK, 1647</title> <keywords>drinkglas, roemer, kelkglas, heiplan toren Nieuwe Kerk, steenlegging, Nieuwe Kerk, Willem Backer, Cornelis Backer, Stichting Projecten De Nieuwe Kerk Amsterdam Glascollectie</keywords> <description>Op de kelk is in diamantgravering het heiplan voor de nooit voltooide toren van de Nieuwe Kerk aangebracht.<description>

23. <title>Anatomische les van Prof. Frederik Ruysch, 1670</title> <keywords>schilderij, portret, groepsportret, anatomische les, ambachten en beroepen, onderwijs, Chirurgijnsgilde, Leendert Fruyt, Aert van Swieten, Frederik Ruysch, Gillis Hondekoeter, Rogier de Coen, Joris van Loon Tilanus, Jacob Brandt</keywords> <description> Frederik Ruysch (1638-1731) was de opvolger van Jan Deijman als praelector van het chirurgijnsgilde.De jonge doctor demonstreert de ligging van de lymfevaten in de lies. De nadruk ligt nu niet op de levenloze staat van de dode, zoals bij Rembrandt. Het lichaam op de snijtafel lijkt eerder toe te behoren aan iemand die slaapt. Waarschijnlijk wilde Ruysch hiermee zijn specialiteit verbeelden: dankzij zijn preparatietechnieken leek het alsof de doden nog leefden. Het schilderij is na restauratie voor het eerst sinds lange tijd weer te zien. </description>

24. <title>De brand in het oude stadhuis (1652)</title> <keywords>prent, stadsgezicht, brand van het oude stadhuis op de Dam, Dam</keywords>

25. http://bit.ly/eculture

26. Cultural heritage data cloud http://e-culture.multimedian.nl/resources/datacloud/

27. http://dbpedia.org/resource/Amsterdam

30. DBPedia mobile: Google maps “ Louvre app”

36. From Geolocation to Real-world Annotation Task structure

37. 1

39. 2

41. 3

45. In practice

46. Spui square ( 52° 22′ 7″ N, 4° 53′ 22″ E )

50. “ Spui” Square and the “Lutherse Kerk”

52. “ Spui” Square and the “Lutherse Kerk”

54. “ Maagdenhuis” Building and the “Helios Building”

55. Technical details

57. light weight client with a heavy endpoint

59. Demo

60. Copyright issues with content… mobile DBPedia tabulator: http://bit.ly/lodapp

61. http://bit.ly/i-ams

63. Google maps & Panoramio

64. #URIs and #RDF statements for different schema’s of the location data for the Spui square Evaluation

66. Thank you Previews available on request: send your UUID [email_address] Checkout: http://bit.ly/lodapp http://bit.ly/i-ams http://bit.ly/ekaw2010 This work has been partially supported by: EU project NoTube (ICT-231761), Poseidon project (supported by the Dutch Ministry of Economic Affairs under the BSIK03021 program) and Agora project (funded by NWO in the CATCH programme, grant 640.004.801). Don’t forget to book a week-end in Amsterdam