The Linked Government Data Landscape Today data.gov and TWC LOGD Li Ding, Jim Hendler and Deborah L....
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The Linked Government Data Landscape Today data.gov and TWC LOGD Li Ding, Jim Hendler and Deborah L. McGuinness Tetherless World Constellation Rensselaer Polytechnic Institute Nov 8, 2010
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Transcript of The Linked Government Data Landscape Today data.gov and TWC LOGD Li Ding, Jim Hendler and Deborah L....
The Linked Government Data Landscape Today
data.gov and TWC LOGD
Li Ding, Jim Hendler and Deborah L. McGuinness
Tetherless World ConstellationRensselaer Polytechnic Institute
Nov 8, 2010
2Data.gov and World-Wide Open Government Data Activities
Jan
ua
ry 1
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“Openness will strengthen our democracy and promote efficiency and effectiveness in Government.”
--- President Obama
Putting Government Data online
Ma
y 2
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09
Jan
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ry 1
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data.gov.uk online
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y 2
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data.gov online data.gov relaunchwith semantic webfeatured
Jun
e3
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2009 2010 …
Many countries• US• UK• Australia• New Zealand …
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Semantic Web Featured at data.gov
http://www.data.gov/semantic/ • data.gov adopted Semantic Web Technolgoies• Web-based Mashups • Downloadable RDF data - 6.4 billions of triples
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Data-gov Wiki: Innovations at RPI
The Data-gov Wiki explores and educates the use of semantic web technologies, esp. linked data, in producing, processing and utilizing government data from data.gov.
The Data-gov Wiki is run by the Tetherless World Constellation at RPI, headed by Professors Jim Hendler and Deborah McGuinness and led by Li Ding. Other student team members include: Dominic DiFranzo, Sarah Magidson ,James Michaelis, Alvaro Graves, Adam Bell, Jin Guang Zheng, Xian Li, Tim Lebo, Gregory Todd Williams, Peter Coons, Zhenning Shangguan, Devin Gaffney, William Cooper, Brian Zaik, and Johanna Flores .
40+ Demos 400+ Datasets Tutorials & Videos
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The Data-gov Wiki - Architecture
Data Web
Linked Data
Linked Data
LGDin RDF
Enhancement
ConversionKn
ow
led
ge P
roven
an
ce
…
Consume
LGD: Linked government data
6Conversion: From Raw Tabular Data to RDF
7Enhancement: Linking Open Government Data
ID year PHSY_ST site-id cost
1998 10.0
1999 site123 11.3
2000 NY 8.3
2001 20
site-id Latitude longitude
site123 43.993 -70.326
Year claims
2000 382
PHSY_ST: state abbreviationID: unique id
cost: unit is million US dollarsyear: 1975-2008
Correlated dataset Complement dataset
Metadata (field definition) Metadata (value definition)
owl:sameAs
DS123:NY
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Exhibit Visualization API
Data.govData.gov
CASTNET Ozone(CSV)
epa.govepa.gov
CASTNET Site(CSV)
Convert raw dataset into linkable RDF
Data Mashup Web Application MashupVisualization Mashup
query multiple RDF dataset via SPARQL end point
surf to EPA applications
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drill down for details3
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Created by Dominic DiFranzo, PhD student at RPI, http://www.data.gov/semantic/Castnet/html/exhibit
Consumption: Mashing up LOGD Data
9Provenance: Tracking Create, Derive, Revision Events
Convert
derive derive
create
derive
revision
Access
Enhance
Version
SemDiff
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TWC LOGD Status: Website Statistics
• Page Rank=5• Site Traffic
– 378,128 page hits – 28,481 visits– 16,041 visitors– 4126 cities– 34 countries
• Ranked 6th in Google “data gov” Search
Note: the above statistics are about http://data-gov.tw.rpi.edu. Dataset access not counted.
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Conclusion and Future Work
• Now– 6.4 8.5 billions of triples – “data + visualization + mashup” – Low-cost solutions– Education
• New LOGD site is coming– More raw data, catalog, links, – More technologies, RDFa– More tools, services– More demos, tutorials, videos– More domain applications
• Future Research – Data integration, link, search– Social machine– Provenance, versions, trust– Usability and data quality– Scalability scalable
http://logd.tw.rpi.edu
