Location and linked data
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Transcript of Location and linked data
Location and Linked Data
Dr John Goodwin
Research Scientist
Ordnance Survey
The Problems with Place
Hampshire – A confusing place
Today:
• Hampshire = The (Administrative) County of Hampshire or
The (Vernacular) County(ies) of Hampshire.
• Wikipedia is confused!
Historically:
• Southamptonshire, Hamptonshire, County of Southampton
• with or without the Isle of Wight and Bournemouth
Opening UK Public Sector Information: Ordnance
Survey and Linked Data
• At the forefront of the geospatial linked data
web in Great Britain.
• Provide a well trusted source of location
data for the linked data web.
Ordnance Survey and Linked Data
Ordnance Survey Linked Data
http://data.ordn..co.uk/id/postcode/SO168BY
http://data.ordn...co.uk/id/7000000000037256
http://data.ordn...co.uk/id/7000000000041421
The City of Southampton
district
name
containedBy
South East England
name
http://education.data.gov.uk/id/school/1234
“Oasis Academy Lord's Hill”
name
type
edu:School
postcode
http://data.ord..co.uk/id/postcode/SO168BY
http://data.ordn...co.uk/id/7000000000037256
district
The City of Southampton
name
http://data.ordn...co.uk/id/7000000000041421
containedBy
Linked Data & Location In Action
Linked Data In Action: Mashups and Meshups
Traditional Mashup
Fast food vendors in the US
Linked data Meshup
Artists that were played on
specific BBC radio
programmes that come from a
specified place
osgb:700000000000018 db:Birminghamowl:sameAs
osgb:700000000000018 db:Birminghamowl:sameAs
db:Broadcast
db:homeTown
osgb:700000000000018 db:Birminghamowl:sameAs
db:Broadcast
db:homeTown
bbcmusic:aa..#artist
owl:sameAs
osgb:700000000000018 db:Birminghamowl:sameAs
db:Broadcast
db:homeTown
bbcmusic:aa..#artist
owl:sameAs
bbcprog:aap0..#track
foaf:maker
bbcprog:aap0..#segment
po:track
bbcprog:boo..#...
po:time
Key Message: Mashup versus Meshup
• URIs:
� Unambiguously identify a ‘thing’ – avoid name clashes
� Can be looked up to find data on said ‘thing’
� Through the web they provide a mechanism for linking to other
datasets via http
• Linked Data Format (RDF):
� A common, simple data model to be used on the web
� To the web of data what HTML is to the web of documents
Future Work
Linked Data API
• Developed by Jeni Tennison (TSO), Dave Reynolds
(Epimorphics) and Leigh Dodds (Talis)
• Not everyone wants to learn SPARQL
• Allows RESTful access to services built on top of linked
data resources, e.g.
http://os.services.tso.co.uk/geo/api/50k-gazetteer/city/Southampton
Data Enrichment
Spatial Predicates
At small – mid scale a lot can be done using qualitative spatial data, e.g.:
• equals
• touches
• disjoint
• contains
• containedBy
• partiallyOverlaps
Scaling Things Up
• integers
• dates
• strings
• etc…
• points
• lines
• polygons
• etc…
Future Work: Ordnance Survey
A More Vernacular Geography?
• “The General Populous are darned fools:
• They use geographical terms they can’t define.
• They mix up their attribute datasets.
• They can rarely put anything precisely on a map.”
Andy Evans (University of Leeds)
Examples
• The Highlands
• The Lake District
• Spaghetti Junction
• The City Centre, Downtown
• Southside (Glasgow)
• Southside (Edinburgh)
• Most Localities (e.g. Merchant City)
• The Stag Gates
• Foys Corner
© Copyright sylvia duckworth, Geograph
Creative Commons Attribution ShareAlike 3.0 © 2006 Blisco
Linking though place
Hampshire(Administrative)
Hampshire(Vernacular)
Hampshire(keeper of the concept)
Is a
representation of
Is a
representation ofIs historical
representation of
Is historical
representation of
Is historical
representation of
Evolves to
Evolves to
Evolves to
So why do we care?
• Need from emergency services and the like
• Web search needs to be improved
Conclusions
• Location is a key information hub on the linked data web
• Linked Data will open up new opportunities
Some URLs
• http://opendata.ordnancesurvey.co.uk/
• http://data.ordnancesurvey.co.uk/
• http://openspace.ordnancesurvey.co.uk/
• http://opentoids.ordnancesurvey.co.uk/