2. Location Based Application
of the Linked data
DBpedia Mobile: A Location
Aware Semantic Web Client
KISHOJ BAJRACHARYA
Roll No : 111224
3. Linked Data
A set of best practices for publishing and connecting
structured data on the Web.
Principle of Linked data
Use URIs as names for things.
Use HTTP URIs so that people can look up those
names.
When someone looks up a URI, provide useful
information, using the standard formats.
Include links to other URIs for discovering more
things.
8. What is this paper all about?
Location based applications
Useful for tourists.
Exploration of the places while visiting new places.
Using Mobile phone as a guide.
Getting other relevant information of nearby places.
Based on the current GPS position, locates the
position of user.
10. What is this paper all about? (Contd.)
Use position of the user to build SPARQL query and run it
against different SPARQL endpoints, gather all relevant
data.
Data are retrieve from multiple linked data sources.
Renders a map indicating nearby locations with current
position & display background information.
Discover, search and publish Linked Data on the
Semantic Web using their mobile devices.
Publishing content is interlinked with a nearby DBpedia
resource.
11. Why this paper is useful?
Growing of linked open data cloud.
Easy accessibility of linked data using SPARQL
query.
A real location based application of linked data which
is very useful
Support in many smart phones web-browser and all
major desktop browsers. Example: Safari on iPhone
or Opera Mobile 8 on Windows Mobile, etc.
12. Why this paper is useful?
For desktop browsers, location estimated based on
his IP address location.
Performs "geo-tagging" to "resource-tagging" and
allows users to contribute to Geospatial Semantic
Web.
Discover, search and publish Linked Data on the
Semantic Web using their mobile devices
13. How
Mobile phone’s GPS receiver => Location w.r.t.
latitude & longitude.
From latitude & longitude => Original location
geo:lat
geo:long
SPARQL queries are run against different SPARQL
endpoints of different linked data sources.
14. How (Contd.)
Data sources used are:
GeoNames: For locations
Flickr TM wrapper: For images.
Factbook: Provides statistical information about location.
Revyu: Review about a location
Yago: Information for location (museums, monuments, train
stations)
FOAF profile by individual based on worked at, were born at
20. How (Contd.)
Retrieves interlinked data from the Web.
Caches retrieved data in a server-side RDF store.
Dereferences the resource URI.
Query the Sindice Semantic Web search engine for
related information, as well as Revyu for reviews.
26. Publishing Linked data to Web
User may publish his current location, photos &
reviews, interlinked with DBpedia resources.
27. Publishing Linked data to Web (Contd.)
Log in and opens the Content Creation Panel.
Select the type of information to publish (i.e. position,
photo or review)
Choose a DBpedia location to be used to tag the
publish.