This document describes Map4rdf, a faceted browser for exploring and visualizing RDF datasets with geospatial information. Map4rdf allows users to browse datasets through facets and view the data on interactive maps. The document outlines Map4rdf's architecture and functionality, and provides examples of its use with geospatial datasets from Spain including provinces, weather stations, and meteorological observations. Future work aims to improve facet visualization and add support for more semantic vocabularies.

1. Map4rdf - Faceted Browser for
Geospatial Datasets
Alexander de León, Filip Wisniewki, Boris Villazón-Terrazas, Oscar Corcho
Facultad de Informática, Universidad Politécnica de Madrid
Campus de Montegancedo sn, 28660 Boadilla del Monte, Madrid
http://www.oeg-upm.net
bvillazon@fi.upm.es
Phone: 34.91.3366605, Fax: 34.91.3524819
@boricles
Slides available at: http://www.slideshare.net/boricles/
Acknowledgements: Daniel Garijo, Victor Saquicela, Asunción
Gómez-Pérez, Luis M. Vilches, and all OEG members involved in
the Linked Data initiatives
WorkdistributedunderthelicenseCreativeCommonsAttribution-
Noncommercial-Share Alike 3.0

2. ToC
• Motivation
• Map4rdf overview
• Use cases
• Conclusions and future work
2

3. Motivation
Effective usage, develop applications that exploit these data
Streaming resources
3

4. Motivation
Linked Open Data Cloud
4

5. ToC
• Motivation
• Map4rdf overview
• Use cases
• Conclusions and future work
5

6. Overview
• Faceted browsing tool for exploring and visualizing
RDF datasets enhanced with geospatial information.
map4rdf SPARQL
Triplestore
http://oegdev.dia.fi.upm.es/projects/map4rdf/
http://github.com/pejot/linkeddata-visualization-tools/
6

7. Basic architecture
Web*Client* Faceted*Browsing**
Interface*
Event*Bus*
Invoker*
Command*A* Command*B* Command*C* Command*D* Command*E*
Web*Server* Dispatch*Servlet*
Command* Command* Command* Command* Command*
Handler*A* Handler*B* Handler*C* Handler*D* Handler*E*
Data*Access*Object*(DAO)*
SPARQL*Endpoint*
Triplestore*
7

8. Geospatial model
• Model used by DBPedia http://www.w3.org/2005/Incubator/geo/
40.41
geo:lat
dbpedia:Madrid
geo:long
-3.70
• GeoLinkedData Geometry Model, NeoGeo Vocab
http://geo.linkeddata.es/web/guest/modelos
http://geovocab.org/doc/neogeo/
geo:Point
geo:lat 40.41
rdf:type
geo:geometry
geoes:Madrid geoes:wgs84/40.41_-3.70
geo:long
-3.70
8

9. Geospatial model - more complex geometries
geoes:ontology/LineString
rdf:type
geo:geometry
geoes:Ebro geoes:resource/7979707
geoes:ontology/formedBy
geoes:ontology/formedBy
geoes:wsg84/0.67_45.3
… geoes:wsg84/0.45_45.4 geo:Point
geo:lat geo:long geo:lat geo:long
40.41 -3.70 40.41 -3.70
9

10. Google Maps
10

11. OpenStreetMap
11

12. Open Layers Map
12

13. Catalogue Service Web
• http://www.idee.es/csw-inspire-idee/srv/en/main.home
• http://www.idee.es/csw-inspire-idee/servicio
• Also we can include any other WMS service
13

14. Complex geometries
14

15. Suggestions of Editions / Data curation
• For example, let us assume that the resource that
represents the Murcia Airport has not the correct
information.
15

16. ToC
• Motivation
• Map4rdf overview
• Use cases
• Conclusions and future work
16

17. GeoLinkedData
• An open initiative whose aim is to enrich the Web of
Data with Spanish geospatial data
• It started off by publishing diverse information
sources, such as National Geographic Institute of
Spain (IGN) and Statistical Institue of Spain (INE).
• http://geo.linkeddata.es/
17

18. Provinces
18

19. Integrate data coming from the Statistical Institute
19

20. Provinces – Industry Production Index
Specific visualizations for datasets based on SCOVO and RDF Data Cube
http://vocab.deri.ie/scovo
http://www.w3.org/TR/vocab-data-cube/
20

21. Meteorological Linked Data - AEMET
• AEMET, Spanish Meteorological Office, data
• Meteorological data registered by its weather
stations, radars, lightning detectors and ozone
soundings.
• http://aemet.linkeddata.es/
21

22. Weather stations
11/02/11
22

23. Observations for each station
11/02/11
23

24. A particular observation
Specific visualizations for datasets based on SSN Ontology – ongoing work
http://www.w3.org/2005/Incubator/ssn/ssnx/ssn
11/02/11
24

25. ToC
• Motivation
• Map4rdf overview
• Use cases
• Conclusions and future work
25

26. Conclusions
• map4rdf for exploring and visualizing RDF datasets.
• Easy to configure, use and extend
• It is also used in El Viajero, an application for
exploiting, managing and organizing Linked Data in
the domain of news and blogs about traveling
http://webenemasuno.linkeddata.es/index_en.html
• Future work
• Improve facets visualization
• Include more visualizations for specific vocabularies
26

28. Map4rdf - Faceted Browser for
Geospatial Datasets
Alexander de León, Filip Wisniewki, Boris Villazón-Terrazas, Oscar Corcho
Facultad de Informática, Universidad Politécnica de Madrid
Campus de Montegancedo sn, 28660 Boadilla del Monte, Madrid
http://www.oeg-upm.net
bvillazon@fi.upm.es
Phone: 34.91.3366605, Fax: 34.91.3524819
@boricles
Slides available at: http://www.slideshare.net/boricles/
Acknowledgements: Daniel Garijo, Victor Saquicela, Asunción
Gómez-Pérez, Luis M. Vilches, and all OEG members involved in
the Linked Data initiatives
WorkdistributedunderthelicenseCreativeCommonsAttribution-
Noncommercial-Share Alike 3.0